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X-ORIGINAL-URL:https://www.chemistry.ucla.edu
X-WR-CALDESC:Events for UCLA
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BEGIN:VTIMEZONE
TZID:America/Los_Angeles
BEGIN:DAYLIGHT
TZOFFSETFROM:-0800
TZOFFSETTO:-0700
TZNAME:PDT
DTSTART:20210314T100000
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TZOFFSETFROM:-0700
TZOFFSETTO:-0800
TZNAME:PST
DTSTART:20211107T090000
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BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210301T160000
DTEND;TZID=America/Los_Angeles:20210301T160000
DTSTAMP:20260618T143459
CREATED:20210120T182417Z
LAST-MODIFIED:20210120T182417Z
UID:13434-1614614400-1614614400@www.chemistry.ucla.edu
SUMMARY:Chem 228: Ben Zhong Tang
DESCRIPTION:“Aggregology: Science beyond Molecules”
URL:https://www.chemistry.ucla.edu/seminars/chem-228-ben-zhong-tang/
CATEGORIES:Physical Chemistry Seminar,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210302T120000
DTEND;TZID=America/Los_Angeles:20210302T120000
DTSTAMP:20260618T143459
CREATED:20210225T000105Z
LAST-MODIFIED:20210225T000105Z
UID:13444-1614686400-1614686400@www.chemistry.ucla.edu
SUMMARY:Proximity-enabled Reactivity for Biological Studies
DESCRIPTION:Abstract: To genetically introduce new chemical reactivity into live systems\, we engineered the genetic code to encode a new class of unnatural amino acids (Uaas)\, the latent bioreactive Uaas. These Uaas\, after being incorporated into proteins\, specifically react with target natural amino acid residues via proximity-enabled reactivity\, enabling the selective formation of new covalent linkages within and between proteins both in vitro and in live systems. These diverse reactivities\, inaccessible to natural proteins\, open doors to novel protein engineering\, biological research\, and therapeutic applications. I will present specific examples of using the proximity-enabled reactivity to probe ligand-receptor binding\, to identify elusive protein-protein interactions\, and to develop covalent protein drugs for cancer immunotherapy.
URL:https://www.chemistry.ucla.edu/seminars/proximity-enabled-reactivity-biological-studies/
CATEGORIES:Organic Colloquium,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210303T123000
DTEND;TZID=America/Los_Angeles:20210303T123000
DTSTAMP:20260618T143459
CREATED:20210301T205743Z
LAST-MODIFIED:20210301T205743Z
UID:13446-1614774600-1614774600@www.chemistry.ucla.edu
SUMMARY:Dissertation Seminar: Cliff Boldridge
DESCRIPTION:“Specificity in Protein-Protein Interactions: High-Throughput Characterization of Rationally Designed and Naturally Evolved Coiled-Coil Networks”
URL:https://www.chemistry.ucla.edu/seminars/dissertation-seminar-cliff-boldridge/
CATEGORIES:Other,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210303T160000
DTEND;TZID=America/Los_Angeles:20210303T160000
DTSTAMP:20260618T143459
CREATED:20210120T171640Z
LAST-MODIFIED:20210120T171640Z
UID:13424-1614787200-1614787200@www.chemistry.ucla.edu
SUMMARY:Chem 278: Prof. Sheng Xu
DESCRIPTION:Controlled epitaxial growth and fabrication of hybrid halide perovskites \nAbstract: Organic–inorganic hybrid halide perovskites have demonstrated tremendous potential for next-generation electronic and optoelectronic devices due to their remarkable carrier dynamics. Current studies are mostly focused on polycrystals\, since controlled growth of high-quality single crystals is challenging. In this presentation\, I will discuss strategies that enabled the first chemical epitaxial growth of single-crystal hybrid halide perovskites. Using advanced microfabrication\, homo-/hetero-epitaxy\, and a low-temperature solution method\, single crystals can be grown with controlled locations\, morphologies\, orientations\, and strain levels. By a lifting off approach\, single-crystal thin films can be transferred from the epitaxial substrate to a general flexible substrate. This approach opens up broad opportunities for hybrid halide perovskite materials based high-performance electronic and optoelectronic devices.
URL:https://www.chemistry.ucla.edu/seminars/chem-278-prof-sheng-xu/
CATEGORIES:Inorganic Chemistry,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210304T120000
DTEND;TZID=America/Los_Angeles:20210304T120000
DTSTAMP:20260618T143459
CREATED:20210120T172927Z
LAST-MODIFIED:20210120T172927Z
UID:13429-1614859200-1614859200@www.chemistry.ucla.edu
SUMMARY:Chem 218 Student Exit Seminar: Sophia King
DESCRIPTION:Controlling the Architecture of Nanoporous Materials to Regulate their Thermal Conductivity and Optical Transparency for Energy Efficient Windows \n Transparent\, low thermal conductivity coatings can be applied to windows to increase the energy efficiency of buildings. Amorphous material such as silica make good thermal insulators due to their local atomic disorder that impedes heat conduction. Moreover\, pores can be added to the material to further reduce heat conduction by decreasing the material density while adding interfaces can additionally scatter heat carriers. This concept is often used in highly porous silica aerogels\, which are valued for their ultra-low thermal conductivities. However\, these aerogels significantly scatter light\, and therefore cannot be used for applications that require high optical transparency. This talk focuses on our ongoing efforts to design silica-based coating that are insulating as well as optically transparent. First\, I will describe our efforts using mesoporous thin films to expand on our fundamental understanding of heat transport in nanoporous\, silica-based materials. Next\, I will discuss how the knowledge gained from these thin film studies influenced our design of novel precursors and a scalable synthetic method to produce monoliths that can be used in thermal insulation applications. Finally\, I will describe our efforts to use small angle X-ray scattering (SAXS) to follow structural changes in porous materials with the goal of understanding how surface chemistry and drying dynamics influence pore structure to produce materials with desired thermal conductivity and optical quality.
URL:https://www.chemistry.ucla.edu/seminars/chem-218-student-exit-seminar-sophia-king/
CATEGORIES:Other,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210304T160000
DTEND;TZID=America/Los_Angeles:20210304T160000
DTSTAMP:20260618T143459
CREATED:20210120T235559Z
LAST-MODIFIED:20210120T235559Z
UID:13438-1614873600-1614873600@www.chemistry.ucla.edu
SUMMARY:Break-it-to-Make-it Strategies for Chemical Synthesis Inspired by Complex Natural Products”
DESCRIPTION:Abstract: Natural products continue to inspire and serve as the basis of new medicines. They also provide intricate problems that expose limitations in the strategies and methods employed in chemical synthesis. Several strategies and methods that have been developed in our laboratory and applied to the syntheses of architecturally complex diterpenoid alkaloids\, indole alkaloids\, and several Lycopodium alkaloids\, will be discussed. In addition\, new ways to employ C–C bond cleavage in synthesis will be presented (i.e.\, break-it-to-make-it strategies).
URL:https://www.chemistry.ucla.edu/seminars/break-it-make-it-strategies-chemical-synthesis-inspired-complex-natural-products/
CATEGORIES:Organic Colloquium,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210305T133000
DTEND;TZID=America/Los_Angeles:20210305T133000
DTSTAMP:20260618T143459
CREATED:20210104T172651Z
LAST-MODIFIED:20210104T172651Z
UID:13403-1614951000-1614951000@www.chemistry.ucla.edu
SUMMARY:Chem 268: Prof. Benjamin Falcon
DESCRIPTION:“Amyloid conformers in neurodegenerative disease”
URL:https://www.chemistry.ucla.edu/seminars/chem-268-prof-benjamin-falcon/
CATEGORIES:Biochemistry,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210308T160000
DTEND;TZID=America/Los_Angeles:20210308T160000
DTSTAMP:20260618T143459
CREATED:20210120T182725Z
LAST-MODIFIED:20210120T182725Z
UID:13435-1615219200-1615219200@www.chemistry.ucla.edu
SUMMARY:Chem 228: Peter Dahlberg\, Ph.D.
DESCRIPTION:“Combining cryogenic single-molecule fluorescence measurements and CryoEM: New methods with applications from biology to physical chemistry”
URL:https://www.chemistry.ucla.edu/seminars/chem-228-peter-dahlberg-phd/
CATEGORIES:Physical Chemistry Seminar,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210310T120000
DTEND;TZID=America/Los_Angeles:20210310T120000
DTSTAMP:20260618T143459
CREATED:20210304T164531Z
LAST-MODIFIED:20210304T164531Z
UID:13448-1615377600-1615377600@www.chemistry.ucla.edu
SUMMARY:Chem 218 Student Exit Seminar: Wenfei Li
DESCRIPTION:Developing Highly Efficient Electronic Structure Theory Methods for Large Scale Simulations \n Electronic structure simulations are now becoming an indispensable tool in chemistry research. The overall goal is to develop methods that give accurate results without sacrificing efficiency. In our group\, we incorporate various computational techniques to drastically reduce the cost of simulations. This allows us to run large scale simulations that were not previously possible. Our major innovation is stochastic quantum chemistry\, where we replaced the summation over thousands of deterministic orbitals to an average over much smaller number of stochastic orbitals\, and sometimes only a few suffices. This leads to significant increase in efficiency. In this seminar\, I will talk about my two projects under the stochastic quantum chemistry framework. The first project involved developing an embedding stochastic framework\, where a sub-system of interest is treated using deterministic orbitals\, while the rest of the system is treated using stochastic orbitals. This way\, we can selectively reduce the stochastic errors associated with that sub-system. The second project involved finding an optimal DFT starting point for our stochasticGW code. Apart from that\, I will also introduce our orthogonal projector augmented wave package. Compared with the norm-conserving pseudopotential approach\, the PAW method will allow a lower kinetic energy cutoff\, hence greatly enhances the efficiency of electronic structure theory simulations.
URL:https://www.chemistry.ucla.edu/seminars/chem-218-student-exit-seminar-wenfei-li/
CATEGORIES:Other,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210310T160000
DTEND;TZID=America/Los_Angeles:20210310T160000
DTSTAMP:20260618T143459
CREATED:20210120T172051Z
LAST-MODIFIED:20210120T172051Z
UID:13425-1615392000-1615392000@www.chemistry.ucla.edu
SUMMARY:Chem 278: Prof. Long Luo
DESCRIPTION:Electrifying Inorganic and Organic Synthesis \nAbstract: Electrochemical synthesis is a powerful tool for formulating functional materials and moleculesbecause it offers an additional level of control over the synthesis relative to its chemical counterpart by fine-tuning mass transfer\, potential\, or current. Electrochemical synthesis also allows the convenient analysis of chemical reaction thermodynamics and kinetics using the current signal generated during the electrochemical synthesis. In this talk\, two recent advancements in electrochemical synthesis will be presented: (1) Electrochemical gelation of nanoparticles and (2) Alternating current electrolysis for organic synthesis. 
URL:https://www.chemistry.ucla.edu/seminars/chem-278-prof-long-luo/
CATEGORIES:Inorganic Chemistry,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210311T120000
DTEND;TZID=America/Los_Angeles:20210311T120000
DTSTAMP:20260618T143459
CREATED:20210120T173102Z
LAST-MODIFIED:20210120T173102Z
UID:13430-1615464000-1615464000@www.chemistry.ucla.edu
SUMMARY:Chem 218 Student Exit Seminar: David Reilley
DESCRIPTION:Chemical Change in Protein Molecular Dynamics: Developing Computational Tools for Metal Binding and pH Sensitivity \n Molecular dynamics (MD) is a powerful tool to study atomic scale changes in proteins underpinning biological pathways. However\, simulations traditionally sample a fixed chemical state and struggle to achieve quantitatively accurate energies\, making comparisons of different chemical ensembles challenging. Hybrid quantum mechanical-classical approaches (QM/MM) can provide accurate energies for small regions of interest\, such as the active site\, but cannot readily capture all chemical transformations relevant to protein function. This talk will focus on developments and applications of hybrid methods to study the metal binding preferences and pH sensitivity of proteins. We will first discuss how we used QM/DMD combined with a competitive metal affinity method\, a semi-empirical thermodynamic cycle\, to obtain relative binding affinities for a wide range of metals to human serum transferrin (hTF)\, an iron transport protein. Our results clarified a mechanism for promiscuous metal binding in hTF and the role the protein may play in transport of non-physiological and potentially cytotoxic metals. We will then discuss the development of a titration feature for constant pH simulations with DMD (titr-DMD). Our method features stochastic protonation and deprotonation of amino acids while treating solvent implicitly\, which makes it computationally efficient compared to other techniques. We successfully benchmarked titr-DMD on experimentally verified pH-dependent conformational changes. Our work demonstrates the utility of molecular dynamics\, and QM/DMD in particular\, to study chemical changes in proteins with good accuracy and speed.
URL:https://www.chemistry.ucla.edu/seminars/chem-218-student-exit-seminar-david-reilley/
CATEGORIES:Other,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210311T130000
DTEND;TZID=America/Los_Angeles:20210311T130000
DTSTAMP:20260618T143459
CREATED:20210304T164257Z
LAST-MODIFIED:20210304T164257Z
UID:13447-1615467600-1615467600@www.chemistry.ucla.edu
SUMMARY:CIC Careers in Green Chemistry Seminar Series
DESCRIPTION:The Center for Integrated Catalysis is hosting a new seminar series called the “Careers in Green Chemistry.” With these webinars\, we aim to bring speakers from a wide variety of careers\, linked through green chemistry\, to come talk about their current job as well as the career path that led them to that position. We are pleased to invite all students\, postdocs\, and faculty.
URL:https://www.chemistry.ucla.edu/seminars/cic-careers-green-chemistry-seminar-series/
CATEGORIES:Other,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210312T153000
DTEND;TZID=America/Los_Angeles:20210312T153000
DTSTAMP:20260618T143459
CREATED:20210104T172741Z
LAST-MODIFIED:20210104T172741Z
UID:13405-1615563000-1615563000@www.chemistry.ucla.edu
SUMMARY:CANCELLED - Chem 268: Prof. Hernan Garcia
DESCRIPTION:“Dissecting Transcriptional Dynamics in Development One Burst at a Time”
URL:https://www.chemistry.ucla.edu/seminars/cancelled-chem-268-prof-hernan-garcia/
CATEGORIES:Biochemistry,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210318T120000
DTEND;TZID=America/Los_Angeles:20210318T120000
DTSTAMP:20260618T143459
CREATED:20210225T175009Z
LAST-MODIFIED:20210225T175009Z
UID:13445-1616068800-1616068800@www.chemistry.ucla.edu
SUMMARY:Chem 218 Student Exit Seminar: Arundhati Deshmukh
DESCRIPTION:“Tuning the Excitonic Properties of 2-Dimensional Molecular Aggregates across the Visible and Shortwave Infrared” \n Molecular aggregates are non-covalent self-assemblies of chromophores wherein transition dipole moments of individual molecules couple coherently over long distances\, forming delocalized excitons. This imparts exciting photophysical properties such as extreme blue or red shifts (seen in H- or J-aggregates respectively)\, narrow linewidths and high molar absorptivities. We modulate the transition dipole couplings within an aggregate via molecular packing\, topology\, and disorder in order to tune and explore new photophysical behaviors. In this talk\, I will discuss the unusual situation that arises from 2D transition dipole coupling in sheet-like aggregates. In addition to traditional H- and J-aggregation\, we find a new case of ‘I-aggregation’ which shows intermediate characteristics of H- and J-aggregates. I will also describe how we use thermodynamics of self-assembly to control the aggregate packing and thereby\, tune excitonic properties. Using a three-component equilibrium model\, I will lay down general principles for selectively stabilizing H- or J-aggregates\, allowing us to construct a library of 2D J-aggregates with absorptions spanning the visible and shortwave infrared (SWIR) regions. Finally\, I will show how subtle differences in chromophore structures within this library modulate the aggregate packing and eventually lead to distinct excitonic band pictures\, that can be experimentally probed using temperature dependent spectroscopy. Overall\, this work establishes molecular aggregation as a tunable avenue for accessing unusual photophysical properties and thus\, opens up organic chromophores to new functionalities including SWIR imaging\, plexitonics\, and telecommunications.
URL:https://www.chemistry.ucla.edu/seminars/chem-218-student-exit-seminar-arundhati-deshmukh/
CATEGORIES:Other,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210319T130000
DTEND;TZID=America/Los_Angeles:20210319T130000
DTSTAMP:20260618T143459
CREATED:20210308T180314Z
LAST-MODIFIED:20210308T180314Z
UID:13449-1616158800-1616158800@www.chemistry.ucla.edu
SUMMARY:NSF Center for Integrated Catalysis Webinar Series
DESCRIPTION:“Invention of Catalysts for Synthesis of New Plastics” \n Abstract: This presentation will begin with a brief discussion of the properties of polyethylene and the synthesis of various forms of polyethylene via early metal catalysts and via free radical processes. Following this short discussion\, I will discuss our thought processes in developing late metal olefin polymerization catalysts and focus particularly on the chemistry of Ni(II) and Pd(II) diimine-derived catalysts. The talk will finish with a discussion of issues surrounding copolymerization of ethylene and polar vinyl monomers and a mechanistic dissection of the copolymerization of ethylene with vinyl trialkoxysilanes using both Pd(II) and Ni(II) diimine catalysts.
URL:https://www.chemistry.ucla.edu/seminars/nsf-center-integrated-catalysis-webinar-series-6/
CATEGORIES:Other,Seminars
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=America/Los_Angeles:20210331T160000
DTEND;TZID=America/Los_Angeles:20210331T160000
DTSTAMP:20260618T143459
CREATED:20210323T213721Z
LAST-MODIFIED:20210323T213721Z
UID:13458-1617206400-1617206400@www.chemistry.ucla.edu
SUMMARY:Chem 278: Prof. Wenliang Huang
DESCRIPTION:“f-Block metal-arene interactions: from inverse sandwiches to redox chemistry” \nAbstract: Recent years have witnessed the breakthrough of identifying unusual oxidation states of f-block elements in molecular compounds such as divalent rare earth metals and actinides\, as well as tetravalent terbium and praseodymium. By taking advantage of the symmetry and energy match between the f/d orbitals of low-valent f-block ions and π* orbitals of arenes\, we synthesized a series of metal arene complexes featuring an inverse-sandwich structure. We found that δ bonds are responsible for the unusual stability of the tetranionic arene anions in such compounds. Moreover\, f-block ions show a significant covalent character\, and the extent of covalent interaction increases according to the order: rare earth metals < thorium < uranium. Inspired by these metal-arene δ bonding interactions\, as well as the traditional π-donor character of arene ligands\, we designed a tripodal-type tris(amide) ligand system featuring an arene anchor. We anticipated that the amphiphilic nature of the arene backbone may support both low and high valent f-block metal centers. This strategy allowed us to stabilize multiple oxidation states of f-block metals with a single ligand and opened up new avenues in the redox chemistry of these ions.
URL:https://www.chemistry.ucla.edu/seminars/chem-278-prof-wenliang-huang/
CATEGORIES:Inorganic Chemistry,Seminars
END:VEVENT
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