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|
| Type |
Poster Presentation |
| Area |
Physical Chemistry |
| Room No. |
Event Hall |
| Time |
4월 20일 (금요일) 11:00~12:30 |
| Code |
PHYS.P-108 |
| Subject |
Excited state dynamics in high-lying electronic states of difluoroboron pyrromethenes using ultrafast fluorescence up-conversion technique |
| Authors |
Kiho Seo, Pyoungsik Shin, Munnyon Kim, Taiha Joo*
Department of Chemistry, Pohang University of Science and Technology, Korea
|
| Abstract |
In photochemical reactions, high-lying excited states are produced by impulsive laser pulse which has energy accordance with higher absorption band in molecules. After pulsed photoexcitation into the higher excited states, S2 or S3 (at energies of 24096 ~ 26315 cm-1 above the S0 state), the molecules are deactivated to a lower excited state via non-radiative process kinetically competitive with fluorescence, but most of cases, internal conversion is superior to fluorescence because it takes to tens femtoseconds time scale. Thus we have applied time-resolved fluorescence (TRF) spectroscopy with ultrafast time resolution to molecular dynamics undergoing internal conversion, vibronic relaxation, and other nonradiative transitions. We have also compared the internal conversion rates from two differential electronic states. |
| E-mail |
seokh@postech.ac.kr |
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121st General Meeting of the KCS