Hi everyone,
Tomorrow Joey will be giving us group meeting. Please see below for the
title and abstract of his talk.
Cheers,
Jennifer
-----------------------------------
What are the signatures of ultrafast energy transfer through a conical
intersection, in a 2D electronic spectrum?
Many incredibly interesting chemical systems exhibit a rapid energy
transfer from an exited electronic state to their ground electronic state, due
to a phenomenon known as a conical intersection. This phenomenon is
actually what allows all creatures on this planet to see and also not
constantly get cancer from the sun; both retinal and all the DNA bases
exhibit this kind of "intersection". It is called so, because it occurs
when two different electronic energy states have [diabatic] nuclear
potential energies which intersect. When this happens, two different
electronic states have the same total potential energy at one (or more than
one) point. Around this intersection point, the Born-Oppenheimer
approximation break down and under certain conditions, a rapid transfer to
the electronic ground state happens. Approximate simulation of this
phenomenon takes up a great deal of scientific effort in the chemical
physics community. Oddly enough, however, no one has yet to use exact
nuclear dynamics to simulate a two-dimensional electronic spectrum in a
system with a conical intersection--which is a shame, because 2D
spectroscopy is how one studies electronic energy transfer. Because of my
established codebase which does exact nuclear dynamics and calculates
spectra, and because of advances in computing power, we are uniquely
positioned to make an interesting, new contribution to this field and look
for fingerprint of conical intersections in 2D spectra for experimentalists
to look for.
*This talk will be a very rough draft for my thesis committee meeting in
mid-May.
**It is my sincere hope that the entirety of my presentation will be
follow-able by every member of the group from new undergrad to Alan.
Please let me know if it is not!
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