Real-time spectroscopy of the excited-state excitons in porphyrin J-aggregates

被引：14

作者：

Kano, H ^{[1
]}

Kobayashi, T ^{[1
]}

机构：

[1] Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 2002年 / 75卷 / 05期

关键词：

D O I：

10.1246/bcsj.75.1071

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The excited exciton (S-2-exciton originating from the second-excited state of the molecules) was studied by real-time spectroscopy with 30-fs pulses. The ultrafast dynamics due to the S-2-S-1 internal conversion process were clearly observed in the pump-probe signal. The signal was modulated by the coherent molecular vibrations with 241 +/- 4 cm(-1) and 319 +/- 4 cm(-1) frequencies. The phase of the oscillation indicates that not only the ground state but also the excited state contribute to the oscillatory signal. The excited-state wave-packet motion was explained by dynamic intensity borrowing mechanism from the S-2 reversible arrow S-0-transitions to the S-1 reversible arrow S-0-transitions.

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页码：1071 / 1074

页数：4

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