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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Liu, Jianyong Zhou, Panwang Zhao, Li |
| Description | Author Affiliation: Zhao L ( State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China.); Liu J ( University of the Chinese Academy of Sciences , Beijing 100049, China.); Zhou P ( State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences , Dalian 116023, China.) |
| Abstract | The deactivation process of salicylidene methylamine in the gas phase has been explored using static calculations (CASSCF, CASPT2, and CC2) and on-the-fly surface hopping dynamics simulations (CASSCF). Five minimum energy conical intersections (MECIs) were located upon the geometry optimization calculations. One corresponds to the excited state intramolecular proton transfer (ESIPT) process, and the remaining four arise from CN bond rotational motion. Our calculation results found that the molecule prefers to decay to the ground state through the four rotational motion related MECIs rather than the ESIPT related one. This mechanistic scenario is verified by the energy profiles connecting the Franck-Condon point and the MECIs at CASSCF, CASPT2, and CC2 levels. Our proposed new decay mechanism can explain the previous experimental findings of femtosecond pump-probe photoionization spectroscopy and can provide additional guidance to the rational design of photochemically switchable molecules. |
| ISSN | 10895639 |
| Issue Number | 38 |
| Journal | The Journal of Physical Chemistry A |
| Volume Number | 120 |
| e-ISSN | 15205215 |
| Language | English |
| Publisher | American Chemical Society (United States) |
| Publisher Date | 2016-09-29 |
| Publisher Place | United States |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Physical chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Physical and Theoretical Chemistry |
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