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SUMMARY:Nonadiabatic chemistry in the pi-sigma*-mediated predissociation d
 ynamics of polyatomic molecules
DTSTART:20200109T170000
DTEND:20200109T180000
DTSTAMP:20260506T002449Z
UID:09e8dab750c5e8732844eef11883c49073fb652bce5784e41e2e2ee2
CATEGORIES:Conferences - Seminars
DESCRIPTION:Sang Kyu Kim\nProfessor\, Department of Chemistry\nKorea Advan
 ced Institute of Science & Technology (KAIST)\nDeajeon (305-701)\, Korea\n
  \nSang Kyu Kim\nDepartment of Chemistry\, KAIST\, Daejeon (34141)\, Kore
 a.\nsangkyukim@kaist.ac.kr\n\nNonadiabatic dynamics are ubiquitous in natu
 re. We are going to introduce some unique examples where we could investig
 ate nonadiabatic transition processes at the molecular level in both spati
 al and temporal domains. Photo-induced processes including predissociation
 \, tunneling\, nonradiative transitions of internal conversion and intersy
 stem crossing\, or photo-detachment are often associated with nonadiabatic
  transitions facilitated in the vicinity of conical intersections. As the 
 conical intersection is multi-dimensional in nature\, it is usually not st
 raightforward to figure out the strong coupling region in terms of structu
 re and energetics. We are here demonstrates that it is quite possible to p
 repare the reactive flux in the proximity of the conical intersection volu
 me to unravel the detailed nonadiabatic bifurcation dynamics mechanism in 
 molecular details. Various experimental tools such as resonant-enhanced io
 nization\, Stark-deflection\, hole-burning\, IR+UV double resonances\, (sl
 ow) velocity-map ion/electron imaging\, or pump-probe based photofragment 
 action spectroscopy have been employed to get hints about the microscopic 
 mechanism of the excited-state chemistry of neutrals and anionic species a
 t very low temperatures. Spectroscopic technique has pros and cons in term
 s of structural identification. Here\, we are going to show how we could p
 ossibly characterize structures of the conical intersections or transition
  states where the molecule stays only briefly in the (3N-6) normal mode sp
 ace where N is the number of atoms in polyatomic systems.\n\nReferences \n
 [1] J. S. Lim\, H. S. You\, S. Y. Kim\, S. K. Kim\, Chem. Sci.\, 10 2404 (
 2019).\n[2] K. C. Woo\, S. K. Kim\, J. Phys. Chem. A\, 123 1529 (2019).\n[
 3] H. S. You et. al.\, J. Phys. Chem. A\, 122 1197 (2018).\n[4] K.-C. Woo\
 , D. H. Kang\, S. K. Kim\, J. Am. Chem. Soc.\, 139 17152 (2017).\n[5] H. S
 . You et. al. Int. Rev. Phys. Chem.\, 34 429 (2015).\n[6] H. S. You et. al
 .\, J. Phys. Chem. Lett.\, 6 3202 (2015).\n[7] J. Lim\, S. K. Kim\, Nat. C
 hem.\, 2 627 (2010).\n[8] K.-C. Woo\, S. K. Kim\, J. Phys. Chem. Lett.\, 1
 1 161 (2020).\n[9] J. S. Lim et. al.\, J. Chem. Phys.\, 151 244305 (2019).
 \n 
LOCATION:CH G1 495 https://plan.epfl.ch/?room==CH%20G1%20495
STATUS:CONFIRMED
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