If you will be at the Midwest Theoretical Chemistry Conference this coming weekend in Ann Arbor, make sure that you see Scott’s talk on Saturday morning on his work developing GPU accelerated CASCI methods for studying non-radiative processes in nanoscale systems. Also check out Garrett and Wei-Tao’s posters.
Levine Group at ACS Denver
Please come check out the symposium titled “Modeling Excited States of Complex Systems,” organized by Ben and Prof. Sergey Varganov of University of Nevada at Reno. It will run all week, with a total of 32 invited speakers. Many thanks to the PHYS division for their support! Ben will not be in attendance for personal reasons, but he hopes everyone will have a great time!
Also, two Levine group members will be presenting talks: Scott will present his work on the GPU acceleration of Full/CAS CI in the above mentioned symposium, while Garrett will present his work on the norm-preserving interpolation (NPI) approach to computing time-derivative couplings in the dynamics symposium (also in PHYS). Make sure you check them out!
Evolutionary Optimization of Fluorophores for OLEDs
Check out Yinan’s newest paper in J. Chem. Phys, which describes our evolutionary approach to the design of fluorophores for light emitting diodes. We identify several classes of molecules which are predicted to have a high propensity for thermally activated delayed fluorescence, and also demonstrate our genetic algorithm approach to provide an efficient sampling of chemical space.
Conical Intersections on the Oxidized Silicon Surface in JPC C
Yinan’s newest paper on conical intersections which arise upon oxidation of the silicon surface is in J. Phys. Chem. C.! We show that several different silicon epoxide defects exhibit low-lying intersections, and suggest routes to experimental confirmation of these predictions. Check it out!
Welcome to David!
David Bianchi, an MSU junior, will be joining our evolutionary molecular design effort. Welcome, David!
Configuration Interaction Singles Natural Orbital (CISNO) CASCI in JCP
What better way to ring in the new year than to read about electronic structure theory! Check out Yinan’s new paper in JCP on a novel multireference electronic structure approach for excited states: the CISNO-CASCI method. CISNO-CASCI is more computationally efficient than traditional state averaged (SA-) CASSCF, and unlike SA-CASSCF it provides size intensive vertical excitation energies, making it well suited for nanoscale systems composed of multiple excitable subsystems. Enjoy!
Welcome to Wei-Tao and Brandon!
The Levine group has two new members: Wei-Tao Peng and Brandon Child, who are both first year graduate students. Brandon will be working on the ultrafast dynamics of excited transition metal complexes and automated molecular design. Wei-Tao will work on non-radiative processes in semiconductors and electron dynamics in strong fields. Welcome, Brandon and Wei-Tao!
Updated: We’re on the cover! JPC Feature Article: Polyatomic Molecules in Strong Laser Fields are not Bags of Atoms
Update: We’re on the cover!
Yinan and I recently collaborated with the group of Marcos Dantus and Ned Jackson to study the ionization of polyatomic molecules in strong laser fields. Together, we find that seemingly similar organic molecules (ortho/meta/para isomers of methyl acetophenone, for example) can behave very differently under strong laser fields, and that these differences in behavior can be explained if we hypothesize that, even under strong field conditions, ionization leaves behind a relatively cold ion in its electronic ground state. In fact, small energetic differences attributable to positional isomerism are still at work even at >10^13 W / cm^2! Check it out.
Welcome Ben!
MSU undergraduate Ben Thompson has joined our group to study the optical properties of hexanuclear metal complexes for application in luminescent solar concentrators and LEDs. Welcome Ben!
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