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DTSTART;TZID=America/Los_Angeles:20240228T160000
DTEND;TZID=America/Los_Angeles:20240228T170000
DTSTAMP:20240130T215326Z
CREATED:20240105T214032Z
LAST-MODIFIED:20240130T215326Z
UID:31952-1709136000-1709139600@www.chemistry.ucla.edu
SUMMARY:Jeffrey I. Zink Inorganic Chemistry Seminar Series - Prof. Chong Liu
DESCRIPTION:Flyer: Prof. Chong Liu Flyer \nTitle: Materials Design for Critical Element Separation \nAbstract: The development of renewable energy technologies and next-generation quantum and optoelectronic devices relies on the secured supply of critical elements. Traditional mining and separation methods are disruptive to the environment\, consume large quantities of harsh chemicals\, and are unable to access dilute resources due to low elemental selectivity. Therefore\, the invention of new separation methods and the fundamental understanding of the separation processes are crucial to realizing sustainable mining while broadening minable resources. In this talk\, I will first introduce a platform method\, electrochemical intercalation\, for selective ion separation. I will present several strategies to promote the separation of lithium and lanthanides based on the understanding of complex host behavior upon co-intercalation of competing ions. In the second part\, I will introduce our efforts in developing methods to construct (sub)nanometer solid ionic channels and probe the water and ion transport behavior in confinement.
URL:https://www.chemistry.ucla.edu/events/jeffrey-i-zink-inorganic-chemistry-seminar-series-prof-chong-liu/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Inorganic
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240221T140000
DTEND;TZID=America/Los_Angeles:20240221T150000
DTSTAMP:20240205T232116Z
CREATED:20240205T232116Z
LAST-MODIFIED:20240205T232116Z
UID:32309-1708524000-1708527600@www.chemistry.ucla.edu
SUMMARY:Special Chemistry Seminar - Rigoberto Hernandez
DESCRIPTION:Hernandez Seminar Flyer \n\n\n\n   3D-Networked Nanoparticles for Autonomous Computing\n\n\n\n\n\n\nAbstract:  Over the last decade\, it has become clear that conventional VLSI is reaching key scaling limits. Moreover\, the energy efficiency of human-engineered electronic devices is many orders of magnitude lower as compared to biological computational structures. Such inefficiencies\, for example\, severely limit our ability to move from 2D to 3D architectures in materials systems as is needed to achieve high performance and span the complexity required for applications using big data or artificial intelligence. We therefore need a new class of materials that can enable computing\, but which are not bound by the rules of conventional VLSI\, and we are inspired by the fact that the brain is an existence proof for such low-energy high-computing materials that do not rely on a von Neumann architecture. We have pursued the use of polymer-networked nanoparticles as a possible alternative. We will summarize our progress on characterizing these materials and report the primitive structures that we have created computationally thus far.
URL:https://www.chemistry.ucla.edu/events/special-chemistry-seminar-rigoberto-hernandez/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Special Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240216T153000
DTEND;TZID=America/Los_Angeles:20240216T163000
DTSTAMP:20240105T190841Z
CREATED:20240105T190841Z
LAST-MODIFIED:20240105T190841Z
UID:31929-1708097400-1708101000@www.chemistry.ucla.edu
SUMMARY:Dickerson Biochemistry Seminar - Ben Montpetit
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/events/dickerson-biochemistry-seminar-ben-montpetit/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Biochemistry
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240214T160000
DTEND;TZID=America/Los_Angeles:20240214T170000
DTSTAMP:20240119T192900Z
CREATED:20240105T213638Z
LAST-MODIFIED:20240119T192900Z
UID:31947-1707926400-1707930000@www.chemistry.ucla.edu
SUMMARY:Jeffrey I. Zink Inorganic Chemistry Seminar Series - Prof. Wenliang Huang
DESCRIPTION:Flyer: Prof. Wenliang Huang Flyer \nTitle: F-Block Metal–Arene Interaction: Dual Reactivity of Metal and Arene \nAbstract: The unique metal–arene interactions motivated the advancement of chemical bond theory\, and enabled a wide range of applications in synthesis and catalysis. In addition\, ligand designs incorporating metal–arene interaction led to breakthroughs in stabilizing unusual oxidation states\, and empowering small molecule activation and catalysis. Our group focuses on utilizing f-block metal-arene interactions in synthesis and catalysis. We have synthesized a series of inverse-sandwich f-block metal arene complexes and explored their reactivity. In addition\, we have incorporated metal-arene interaction in ligand design and developed tripodal tris(amino)arene ligands capable of supporting multiple oxidation states of f-elements. Our results unveiled that the f-block metal-arene interaction not only enables redox chemistry at the metal site\, but also leads to unprecedented functionalization of the arenes.
URL:https://www.chemistry.ucla.edu/events/jeffrey-i-zink-inorganic-chemistry-seminar-series-prof-wenliang-huang/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Inorganic
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240209T153000
DTEND;TZID=America/Los_Angeles:20240209T163000
DTSTAMP:20240105T190705Z
CREATED:20240105T190705Z
LAST-MODIFIED:20240105T190705Z
UID:31927-1707492600-1707496200@www.chemistry.ucla.edu
SUMMARY:Dickerson Biochemistry Seminar - Derrick Morton
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/events/dickerson-biochemistry-seminar-derrick-morton/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Biochemistry
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240202T150000
DTEND;TZID=America/Los_Angeles:20240202T163000
DTSTAMP:20240105T190352Z
CREATED:20240105T190352Z
LAST-MODIFIED:20240105T190352Z
UID:31925-1706886000-1706891400@www.chemistry.ucla.edu
SUMMARY:Dickerson Biochemistry Seminar - Yinsheng Wang
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/events/dickerson-biochemistry-seminar-yinsheng-wang/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Biochemistry
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240126T153000
DTEND;TZID=America/Los_Angeles:20240126T163000
DTSTAMP:20240105T190245Z
CREATED:20240105T190245Z
LAST-MODIFIED:20240105T190245Z
UID:31923-1706283000-1706286600@www.chemistry.ucla.edu
SUMMARY:Dickerson Biochemistry Seminar - Lalit Deshmukh
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/events/dickerson-biochemistry-seminar-lalit-deshmukh/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Biochemistry
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240125T160000
DTEND;TZID=America/Los_Angeles:20240125T170000
DTSTAMP:20240108T182936Z
CREATED:20230728T200846Z
LAST-MODIFIED:20240108T182936Z
UID:30693-1706198400-1706202000@www.chemistry.ucla.edu
SUMMARY:Distinguished Lecture Series - David A. Leigh
DESCRIPTION:Title: Giving Chemistry Direction \nAbstract: In recent years examples of synthetic molecular machines and motors have been developed\, all be they primitive by biological standards. Such molecules are best designed to work through statistical mechanisms. In a manner reminiscent of Maxwell’s Demon\, random thermal motion can be rectified through ratchet mechanisms\, giving chemistry direction. \nIt is increasingly being recognized that similar concepts can be applied to other chemical exchange processes. Ratchet mechanisms—effectively chemical engines in which catalysis of ‘fuel’ to ‘waste’ is used to drive another chemical process—can cause directional impetus in what are otherwise stochastic systems\, including reversible chemical reactions. This is ushering in a new era of non-equilibrium chemistry\, providing fundamental advances in functional molecule design and the first examples of molecular robotics\, overturning existing dogma and offering fresh insights into biology and molecular nanotechnology. \nDavid Leigh DLS Flyer
URL:https://www.chemistry.ucla.edu/events/distinguished-lecture-series-david-a-leigh/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Distinguished Lecture Series
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240112T153000
DTEND;TZID=America/Los_Angeles:20240112T163000
DTSTAMP:20240105T190118Z
CREATED:20240105T190100Z
LAST-MODIFIED:20240105T190118Z
UID:31921-1705073400-1705077000@www.chemistry.ucla.edu
SUMMARY:Dickerson Biochemistry Seminar - Karin Reinisch
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/events/dickerson-biochemistry-seminar-karin-reinisch/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20240110T160000
DTEND;TZID=America/Los_Angeles:20240110T170000
DTSTAMP:20240108T175506Z
CREATED:20240108T175429Z
LAST-MODIFIED:20240108T175506Z
UID:31984-1704902400-1704906000@www.chemistry.ucla.edu
SUMMARY:Inorganic Chemistry Student Exit Talk: Aamir Shah
DESCRIPTION:Flyer: Aamir Shah Flyer \nTitle: Fundamental Understanding of Electrode-Electrolyte Interface in Hydrogen Evolution Reaction (HER) Kinetics \nAbstract: Abstract: The hydrogen evolution reaction (HER) is one of the most fundamental and critical reactions in renewable energy conversion. The recent advancement in various platinum (Pt) nanocatalyst designs has led to greatly improved HER activity. Identification of the exact active sites and understanding the structure-activity relationship are critical for rational catalyst design but remain elusive due to the lack of methods robustly resolving the role of different surface sites. Moreover\, it is well recognized that the HER kinetics is drastically slower in alkaline media compared to acidic media\, but the descriptors of the HER kinetics are still elusive. Specifically\, in the presence of alkali metal cations and hydroxyl anions\, the electrode–electrolyte (platinum–water) interface in an alkaline electrolyte is far more complex than that in an acidic electrolyte. The effects of different alkali metal cations (AM+) and pH on these reactions are poorly understood due to a lack of suitable experimental methods. We are combining surface-sensitive electrical transport spectroscopy (ETS) with other electrochemistry techniques and computational studies to probe and understand the fundamental role of different AM+ and pH on the reaction kinetics of HER. Our study provides fundamental insights into how and why AM+ and pH influence the HER in alkaline media. We expect that this research will provide the molecular-level understanding that will shed new insights into electrolyte engineering as an alternative pathway to control electrochemical reaction kinetics.
URL:https://www.chemistry.ucla.edu/events/inorganic-chemistry-student-exit-talk-aamir-shah/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Inorganic Chemistry
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231201T153000
DTEND;TZID=America/Los_Angeles:20231201T163000
DTSTAMP:20240105T185950Z
CREATED:20230925T162414Z
LAST-MODIFIED:20240105T185950Z
UID:31087-1701444600-1701448200@www.chemistry.ucla.edu
SUMMARY:Dickerson Biochemistry Seminar – Carla Koehler and Hannah Shafaat
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/events/dickerson-biochemistry-seminar-carla-koehler-and-hannah-shafaat/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Biochemistry
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231130T160000
DTEND;TZID=America/Los_Angeles:20231130T170000
DTSTAMP:20230816T001018Z
CREATED:20230816T001018Z
LAST-MODIFIED:20230816T001018Z
UID:30812-1701360000-1701363600@www.chemistry.ucla.edu
SUMMARY:Bristol-Myers Squibb Lecture - Prof. Christina White and Dr. William Gallagher
DESCRIPTION:Seminar Information TBD
URL:https://www.chemistry.ucla.edu/events/bristol-myers-squibb-lecture-prof-christina-white-and-dr-william-gallagher/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:BMS
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231130T120000
DTEND;TZID=America/Los_Angeles:20231130T130000
DTSTAMP:20230828T184803Z
CREATED:20230828T184803Z
LAST-MODIFIED:20230828T184803Z
UID:30888-1701345600-1701349200@www.chemistry.ucla.edu
SUMMARY:Chem 218 Student Exit Seminar: Nadine Bradbury
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/events/chem-218-student-exit-seminar-nadine-bradbury/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Chem 218 Student Exit Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231127T160000
DTEND;TZID=America/Los_Angeles:20231127T170000
DTSTAMP:20230921T203145Z
CREATED:20230816T020328Z
LAST-MODIFIED:20230921T203145Z
UID:30839-1701100800-1701104400@www.chemistry.ucla.edu
SUMMARY:Physical Chemistry Seminar 228: Robert Baker
DESCRIPTION:Baker Flyer \nTitle: Observing Ultrafast Electron Motion in Catalytic Systems: New Ways to Visualize Charge and Spin Dynamics at Interfaces \nAbstract: Understanding and controlling electron dynamics at interfaces is at the heart of numerous applications ranging from heterogenous catalysis to information processing. To directly observe these dynamics\, we have developed ultrafast XUV reflection spectroscopy as a surface sensitive analog of time-resolved x-ray absorption. In these measurements\, high harmonic generation of attosecond to femtosecond XUV pulses enables real-time observation of charge and spin dynamics with element specificity\, ultrafast time resolution\, and near atomic layer surface sensitivity. This talk will highlight recent studies of surface electron dynamics in materials ranging from photocatalysts to magnetic semiconductors to systems displaying chiral-induced spin selectivity (CISS). In addition to ultrafast electron transfer\, we also study the interfacial solvation structure in electrocatalytic systems using in-situ sum frequency generation vibrational spectroscopy. This complimentary tool enables direct measurement of solvent-mediated electric fields at catalytic interfaces\, which are found to significantly influence the kinetics of electrochemical CO2 activation and reduction. Last\, I will briefly describe the National eXtreme Ultrafast Science (NeXUS) facility. This $10M infrastructure project provides attosecond and femtosecond pulses of XUV light with tailored bandwidth to a suite of experimental end-stations enabling molecular and material characterization with unprecedented temporal and spatial resolution. This facility\, which is supported by the National Science Foundation\, will soon become an international open-access user facility serving the entire chemical\, physics\, and materials communities.
URL:https://www.chemistry.ucla.edu/events/physical-chemistry-seminar-228-robert-baker/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Physical Chemistry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231120T160000
DTEND;TZID=America/Los_Angeles:20231120T170000
DTSTAMP:20230921T203056Z
CREATED:20230816T015920Z
LAST-MODIFIED:20230921T203056Z
UID:30837-1700496000-1700499600@www.chemistry.ucla.edu
SUMMARY:Physical Chemistry Seminar 228: Lu Wei
DESCRIPTION:Wei Flyer \nTitle: Functional Bond-Selective Microscopy for Subcellular Bioanalysis \nAbstract: Innovations in optical spectroscopy and microscopy have revolutionized our understanding in live biological systems at the sub-cellular levels. In this talk\, I will present our recent advances in developing and applying functional bond-selective spectro-microscopy for investigating subcellular biological activities with rich chemical information. In the first part of my talk\, I will present the novel coupling of the stimulated Raman scattering (SRS) imaging\, a nonlinear Raman imaging modality\, with the newly developed chemical strategies for Raman-guided intracellular metabolic mapping; quantitative subcellular analysis of cytoplasmic aggregates; photo-activatable and photo-switchable SRS spectral-imaging; intracellular sensing through alkyne-HDX; and toward super-resolution chemical imaging. In the second part of my talk\, I will present a new mid-infrared near-infrared two-photon imaging technique for bond-selective fluorescence imaging with single-molecule sensitivity.
URL:https://www.chemistry.ucla.edu/events/physical-chemistry-seminar-228-lu-wei/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Physical Chemistry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231117T153000
DTEND;TZID=America/Los_Angeles:20231117T163000
DTSTAMP:20230925T162258Z
CREATED:20230925T162258Z
LAST-MODIFIED:20230925T162258Z
UID:31085-1700235000-1700238600@www.chemistry.ucla.edu
SUMMARY:Dickerson Biochemistry Seminar – Stuart Conway and Soumitra Athavale
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/events/dickerson-biochemistry-seminar-stuart-conway-and-soumitra-athavale/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Biochemistry
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231116T160000
DTEND;TZID=America/Los_Angeles:20231116T170000
DTSTAMP:20230815T235036Z
CREATED:20230815T234122Z
LAST-MODIFIED:20230815T235036Z
UID:30807-1700150400-1700154000@www.chemistry.ucla.edu
SUMMARY:Distinguished Lecture Series: Prof. David Christianson
DESCRIPTION:Title: Directing Biosynthesis with Modular Architecture in Terpene Cyclases \nAbstract: Terpene cyclases catalyze the most complex chemical reactions in biology\, in that more than half of the carbon atoms in an isoprenoid substrate undergo changes in bonding or hybridization during a multi-step cyclization cascade that proceeds through multiple carbocation intermediates. Although the substrate pool for these enzymes is limited to only a handful of linear isoprenoids\, more than 100\,000 terpenoid natural products have been identified to date. Crystal structures of terpene cyclases reveal common\, modular protein folds that direct unique catalytic strategies underlying this exquisite chemodiversity. Most recently\, structural studies of bifunctional assembly-line terpene synthases using cryo-EM and other biophysical techniques show how the first two steps of terpene biosynthesis are combined in nanoscale oligomeric assemblies. Cluster channeling within the oligomer ensures efficient carbon management in wild-type and mutant enzymes.
URL:https://www.chemistry.ucla.edu/events/distinguished-lecture-series-prof-david-christianson/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Distinguished Lecture Series
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231113T160000
DTEND;TZID=America/Los_Angeles:20231113T170000
DTSTAMP:20230921T202927Z
CREATED:20230816T015728Z
LAST-MODIFIED:20230921T202927Z
UID:30835-1699891200-1699894800@www.chemistry.ucla.edu
SUMMARY:Physical Chemistry Seminar 228: Lisa Fredin
DESCRIPTION:Fredin Flyer \nTitle: Modeling Photoactive Organic Materials \nAbstract: Chemical intuition is well developed for single molecules but the extent to which disorder in solid state molecular materials contributes to their properties is poorly understood. In particular\, molecular materials move charges in some directions much more efficiently than others due to the packing of the molecules. Noncovalent interactions between the molecular components mean that dynamic disorder in these materials can have a large impact on the electronic properties of these materials at room temperature. This work explores how packing and vibrations in organic crystals affect charge transport in light driven devices. In particular\, the size of dynamic disorder due to phonons or electronic excitation of molecules in the crystal is predicted for well-ordered high-mobility single crystals.
URL:https://www.chemistry.ucla.edu/events/physical-chemistry-seminar-228-lisa-fredin/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Physical Chemistry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231109T160000
DTEND;TZID=America/Los_Angeles:20231109T170000
DTSTAMP:20230815T231306Z
CREATED:20230815T231306Z
LAST-MODIFIED:20230815T231306Z
UID:30801-1699545600-1699549200@www.chemistry.ucla.edu
SUMMARY:Houk-Jung Organic Colloquium 247: Prof. Abby Knight
DESCRIPTION:Knight Flyer \nTitle: Biomimetic Hierarchical Structure in Synthetic Macromolecules \nAbstract: The remarkable functions of proteins\, from refined binding profiles to efficient catalysis\, are currently unrivaled by synthetic macromolecules due to complex hierarchical structure in natural systems. Inspired by this grand challenge\, the Knight group is at the interface of chemical biology and polymer science\, developing synthetic strategies to control hierarchical structure and high-throughput platforms to understand fundamental design principles underlying macromolecule conformation. These research efforts are motivated by the need for innovative strategies to address global health and environmental challenges\, where our foundational work informs the de novo design and development of functional polymeric materials.
URL:https://www.chemistry.ucla.edu/events/houk-jung-organic-colloquium-247-prof-abby-knight/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Organic Colloquium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231108T160000
DTEND;TZID=America/Los_Angeles:20231108T173000
DTSTAMP:20231017T171317Z
CREATED:20230816T170828Z
LAST-MODIFIED:20231017T171317Z
UID:30843-1699459200-1699464600@www.chemistry.ucla.edu
SUMMARY:Jeffrey I. Zink Inorganic Chemistry Seminar Series: Elizabeth Young
DESCRIPTION:Flyer: Prof. Elizabeth Young Flyer \nTitle: From Photodynamic Therapy to Photovoltaics: Photophysics of Pd(II)biladiene and Charge Carrier Dynamics in Thin Films of Light Harvesting Sb2S3 \nAbstract: Solar light harvesting and interconversion of solar energy into either electricity or driving force for small molecule activation reactions are critical to the production of energy and other processes that our society requires to function. In this talk\, I will discuss two project united by photochemistry\, each with their own application. In the first vignette\, I will discuss a porphyrinoid complex\, called a Pd(II)biladiene\, This Pd(II)biladiene moiety was designed for use as a photosensitizer drug for photodynamic therapy. Up until this point\, the excited-state dynamics of such biladiene complexes have been virtually unexplored. During our work on this moiety\, we discovered that while excitation into the lowest-energy absorption feature of the Pd(II)biladiene complexes produces expected photophysics\, interestingly\, excitation into higher-lying excited states resulted in an additional\, unexpected lifetime. I will discuss our work to propose the cause of this unexpected behavior. In the second vignette\, I will discuss our recent work on stibnite (Sb2S3)\, which can be employed as the photoactive layer in next generation thin-film solar cells. Sb2S3 is of particular interest due to the suitable band gap of 1.7 eV and high absorption coefficient (1.8 × 105 cm–1 at 450 nm). I will present our work using transient absorption spectroscopy to directly observe carrier diffusion\, electron transfer\, hole transfer and charge recombination through uniform ultra-thin (< 3 nm) layers of insulating or transport materials deposited by atomic layer deposition (ALD) that are coupled to photo-active materials. Our results will be used to correlate the structure and function of material thickness and transport type to develop a fundamental\, detailed\, quantitative understanding of photo-induced ET dynamics through thin films of materials.
URL:https://www.chemistry.ucla.edu/seminars/jeffrey-i-zink-inorganic-chemistry-seminar-series-elizabeth-young/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Inorganic,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231106T160000
DTEND;TZID=America/Los_Angeles:20231106T170000
DTSTAMP:20230921T202812Z
CREATED:20230816T015405Z
LAST-MODIFIED:20230921T202812Z
UID:30833-1699286400-1699290000@www.chemistry.ucla.edu
SUMMARY:Physical Chemistry Seminar 228: Franz Geiger
DESCRIPTION:Geiger Flyer \nTitle: Photonic Electrochemistry \nAbstract: Water’s oxygen is the electron source in the industrially important oxygen evolution reaction\, but how water interacts with an electrode remains enigmatic. While much microscopic insight into the Stern layer comes from atomistic simulations or joint theory-experiment approaches\, water’s strong absorber problem has clouded our view of how water aligns in response to applied potentials. Here\, we employ nonlinear optics with a non-resonant pulse triplet at Ni:NiOx electrodes during cyclic voltammetry at pH 13 to quantify 𝒩water↓\, the Stern layer water molecules pointing their oxygen atoms towards the electrode\, and Ftot\, the total interfacial potential. 𝒩water↓ varies sigmoidally with applied potential\, U\, but linearly with Ftot. While there is no net alignment at U=0.4 V\, 3/4 of a water monolayer align at U=0.6 V and Eflip\, the energy associated with water flipping\, matches liquid water’s cohesive energy. At U=0.8 V\, all Stern layer water molecules (1 x 10^15 cm^-2) align and Eflip matches the cohesive energy of ice. The current density is exponentially sensitive to 𝒩water↓ and Eflip. Our experiments provide new benchmarks for electrical double layer models and a diagnostic tool for molecular electrochemistry.
URL:https://www.chemistry.ucla.edu/events/physical-chemistry-seminar-228-franz-geiger/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Physical Chemistry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231103T153000
DTEND;TZID=America/Los_Angeles:20231103T163000
DTSTAMP:20230925T162137Z
CREATED:20230925T162137Z
LAST-MODIFIED:20230925T162137Z
UID:31083-1699025400-1699029000@www.chemistry.ucla.edu
SUMMARY:Dickerson Biochemistry Seminar – Jorge Torres and Roy Wollman
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/events/dickerson-biochemistry-seminar-jorge-torres-and-roy-wollman/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Biochemistry
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231102T160000
DTEND;TZID=America/Los_Angeles:20231102T170000
DTSTAMP:20230815T230936Z
CREATED:20230815T230936Z
LAST-MODIFIED:20230815T230936Z
UID:30798-1698940800-1698944400@www.chemistry.ucla.edu
SUMMARY:Houk-Jung Organic Colloquium 247: Prof. Joel Smith
DESCRIPTION:Smith Flyer \nTitle: Dearomative Alkaloid Synthesis \nAbstract: Biologically active alkaloids continue to serve as a means of biomedical discovery in addition to serving as forcing functions for the invention of new chemical transformations. Structurally\, many of these natural products and rationally designed drugs also contain one or more piperidine rings\, making it the most common nitrogenous heterocycle amongst approved small-molecule therapeutics. Thus\, the concise redox-economic construction of these heterocycles in the context of target-oriented synthesis has become a recent research focus in our lab. In particular\, leveraging controlled and selective dearomatization reactions has enabled the concise synthesis of several natural products and approved pharmaceuticals from simple feedstock pyridines. Our lab’s recent synthetic efforts related to alkaloids from the lupin\, ergoline\, aspidosperma\, morphinan and manzamine families of alkaloids will be discussed\, articulating the breadth of targets that can be accessed by this strategic approach. In addition\, both fundamental and translational opportunities afforded by our work in this area will be highlighted.
URL:https://www.chemistry.ucla.edu/events/houk-jung-organic-colloquium-247-prof-joel-smith/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Organic Colloquium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231030T160000
DTEND;TZID=America/Los_Angeles:20231030T170000
DTSTAMP:20230921T202437Z
CREATED:20230816T015138Z
LAST-MODIFIED:20230921T202437Z
UID:30831-1698681600-1698685200@www.chemistry.ucla.edu
SUMMARY:Physical Chemistry Seminar 228: Hannah Shafaat
DESCRIPTION:Shafaat Flyer \nTitle: Model Metalloenzymes to Catalyze the Reactions of Early Life \nAbstract: Metalloenzymes catalyze the challenging chemical reactions that lie at the core of vital life processes\, from carbon and nitrogen fixation to photosynthesis and respiration. Native metalloenzymes use only earth-abundant transition metals and operate under mild conditions\, accessing reactivity that remains largely out of reach for synthetic systems. Given the importance of these fundamental processes in the context of energy\, environment\, sustainability\, and human health\, gaining molecular-level understanding into how metalloenzymes work is of the utmost importance. To this end\, we are developing protein-based models as structural\, functional\, and mechanistic mimics of naturally occurring metalloenzymes. Targets to be discussed in this presentation include hydrogenase\, carbon monoxide dehydrogenase (CODH)\, and acetyl coenzyme A synthase (ACS). These nickel-containing enzymes are implicated in chemoautotrophic origins of life and play key roles in the metabolisms of ancient bacteria and archaea. However\, while these enzymes are highly functional within their cellular environment\, most are costly to isolate\, sensitive to external conditions\, and generally poorly suited for large-scale application. Additionally\, the multimetallic active sites and auxiliary cofactors obscure distinguishing spectroscopic features and render detailed analyses challenging. As a result\, the molecular mechanisms of catalysis remain relatively poorly understood\, thwarting efforts to build biomimetic synthetic systems that act with the efficacy of native enzymes. By combining functional studies of our model proteins with diverse spectroscopic techniques and computational investigations\, we can obtain a comprehensive understanding of how the electronic and geometric structures dictate reactivity in each system. Reconstructing functional metalloenzymes “from the ground up” offers direct insight into the fundamental chemical principles driving the natural systems. Looking forward\, we hope to apply these principles towards engineering effective systems for energy conversion reactions while learning about fundamental chemical transformations that may underlie the evolution of prebiotic processes into early life.
URL:https://www.chemistry.ucla.edu/events/physical-chemistry-seminar-228-hannah-shafaat/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Physical Chemistry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231027T153000
DTEND;TZID=America/Los_Angeles:20231027T163000
DTSTAMP:20230925T162027Z
CREATED:20230925T162027Z
LAST-MODIFIED:20230925T162027Z
UID:31081-1698420600-1698424200@www.chemistry.ucla.edu
SUMMARY:Dickerson Biochemistry Seminar – Ellen Sletten and Danielle Schmitt
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/events/dickerson-biochemistry-seminar-ellen-sletten-and-danielle-schmitt/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Biochemistry
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231026T160000
DTEND;TZID=America/Los_Angeles:20231026T170000
DTSTAMP:20230815T230606Z
CREATED:20230815T230606Z
LAST-MODIFIED:20230815T230606Z
UID:30794-1698336000-1698339600@www.chemistry.ucla.edu
SUMMARY:Houk-Jung Organic Colloquium 247: Dr. Liela Romero
DESCRIPTION:Romero Flyer \nTitle: Highly Selective Catalytic Platforms for Reduction and Interhalogenation Chemistry: Our Early Explorations in ZrH and Lewis Base Catalysis \nAbstract: Research in the Romero group is centered on the development and mechanistic study of novel catalytic reactions\, with applications in natural product synthesis and drug discovery. To this end\, we are exploring new avenues for the catalytic halo- and hydrofunctionalization of simple π-systems. The first research program regards our efforts to develop a unified strategy for the interhalogenation of alkenes and alkynes via Lewis base activation of sulfinyl halides. This approach furnishes vicinal dihalides with pronounced chemo-\, regio-\, and stereocontrol. Notably\, when 1–3 mol% of a chiral Lewis basic catalyst is employed\, a novel enantioselective bromochlorination of chalcones is realized. The second part of this seminar will focus on the development of a general platform for zirconocene hydride catalysis utilizing hydrosilanes as mild reductants. This catalytic system enables a variety of chemoselective and redox-economic functional group interconversions\, including the catalytic semi-reductive diversification of amides and esters\, as well as the hydrofunctionalization of alkynes.
URL:https://www.chemistry.ucla.edu/events/houk-jung-organic-colloquium-247-dr-liela-romero/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Organic Colloquium
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231026T120000
DTEND;TZID=America/Los_Angeles:20231026T130000
DTSTAMP:20230815T225220Z
CREATED:20230815T225220Z
LAST-MODIFIED:20230815T225220Z
UID:30785-1698321600-1698325200@www.chemistry.ucla.edu
SUMMARY:Chem 218 Student Exit Seminar: Benqian Wei
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/events/chem-218-student-exit-seminar-benqian-wei/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Chem 218 Student Exit Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231023T160000
DTEND;TZID=America/Los_Angeles:20231023T170000
DTSTAMP:20230921T201835Z
CREATED:20230816T015008Z
LAST-MODIFIED:20230921T201835Z
UID:30829-1698076800-1698080400@www.chemistry.ucla.edu
SUMMARY:Physical Chemistry Seminar 228: II-Doo Kim
DESCRIPTION:Kim Flyer \nTitle: Innovation in Nanomaterials Synthesis: from Lab to Commercialization \nAbstract: Nanoengineering plays a pivotal role in optimizing nanomaterials to achieve enhanced performance and impressive mechanical stability\, especially in challenging environments. Recent research has been dedicated to the creation of various novel composite materials\, encompassing high entropy and multi-elemental nanoparticles\, as well as the integration of stable single-atom catalysts onto robust supporting nanomaterials to ensure highly efficient catalytic performance. Effective catalyst design is essential not only for the advancement of chemical sensors but also for energy devices like lithium-air batteries\, water-splitting\, and CO2 conversion\, and more. These active nanomaterials\, including catalysts\, must resist agglomeration\, maintain high thermal stability during repetitive reactions\, and necessitate minimal catalyst content for maximal performance. This presentation delves into diverse applications employing electrospun polymer fibers\, metal oxide fibers\, and carbon fibers. The presentation also outlines an expedited and optimal process for catalyst attachment onto electrospun nanofiber backbone structures. Lastly\, a case study traversing the journey from laboratory research to commercialization spotlights the utilization of custom-made electrospinning equipment\, roll-to-roll machines with nozzle arrays spanning 35 cm and 1.2 m widths. As electrospinning relies on solution-based processing\, we can create a range of fiber types\, including colorimetric\, thermochromic\, and antivirus fibers. Finally\, I will conclude by offering insightful perspectives on innovative material synthesis using electrospinning and highlighting interesting case studies of device application
URL:https://www.chemistry.ucla.edu/events/physical-chemistry-seminar-228-ii-doo-kim/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Physical Chemistry Seminar
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231020T153000
DTEND;TZID=America/Los_Angeles:20231020T163000
DTSTAMP:20230925T161920Z
CREATED:20230925T161920Z
LAST-MODIFIED:20230925T161920Z
UID:31078-1697815800-1697819400@www.chemistry.ucla.edu
SUMMARY:Dickerson Biochemistry Seminar – Joe Loo and Michael Lawson
DESCRIPTION:
URL:https://www.chemistry.ucla.edu/events/dickerson-biochemistry-seminar-joe-loo-and-michael-lawson/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Biochemistry
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20231016T160000
DTEND;TZID=America/Los_Angeles:20231016T170000
DTSTAMP:20231012T212307Z
CREATED:20230816T014829Z
LAST-MODIFIED:20231012T212307Z
UID:30827-1697472000-1697475600@www.chemistry.ucla.edu
SUMMARY:Physical Chemistry Seminar 228: Rodrigo Noriega
DESCRIPTION:Noriega Flyer \nTitle: Study and Regulation of Biomolecular Interactions at Electrified Interfaces \nAbstract: We seek to understand the role of electrostatic interactions in molecular recognition mechanisms that are sensitive to structure but not sequence. An interesting model system for these multifaceted interactions is Loquacious-PD (Loqs-PD)\, a co-factor protein with two RNA binding motifs that recognize double-stranded RNA (dsRNA) regardless of their terminus structure. Loqs-PD regulates the terminus-dependent binding of the endonuclease enzyme Dicer-2 and is crucial to the efficient processing of sub-optimal dsRNA targets with a 3’ overhang terminus for gene silencing in Drosophila melanogaster. \nTo identify the effects of electrostatics and local dynamics on the formation and stability of dsRNA:Loqs-PD complexes\, we study their binding and dynamics at electrified interfaces with a combination of mid-infrared surface plasmonics\, time-resolved ultrafast fluorescence\, and in situ electrochemical experiments at the surface of a degenerately doped wide-gap metal oxide. In this way\, we distinguish distinct stages in the binding event between an RNA-binding protein and its target and follow dynamic events over multiple time scales. Time-resolved fluorescence measurements show a high affinity interaction that is strongly affected by electric fields\, while mid-infrared surface plasmon observations detect a lower affinity interaction with a reduced (but still substantial) sensitivity to electric fields. In both cases\, fluctuations are dependent on protein binding and the presence of electric fields. \nMulti-stage binding process that arise from non-specific interactions are common between nucleic acids and proteins\, and studies that employ complementary observations under controlled perturbations are a powerful tool to interrogate the link between molecular recognition and biochemical function. \n 
URL:https://www.chemistry.ucla.edu/events/physical-chemistry-seminar-228-rodrigo-noriega/
LOCATION:Mani L. Bhaumik Centennial Collaboratory\, 607 Charles E. Young Dr.\, East\, Los Angeles\, CA\, 90095\, United States
CATEGORIES:Physical Chemistry Seminar
END:VEVENT
END:VCALENDAR