Mechanism for ultrafast internal conversion of adenine

被引：144

作者：

Kang, H ^{[1
]}

Jung, B ^{[1
]}

Kim, SK ^{[1
]}

机构：

[1] Seoul Natl Univ, Sch Chem, Seoul 151747, South Korea

来源：

JOURNAL OF CHEMICAL PHYSICS | 2003年 / 118卷 / 15期

关键词：

D O I：

10.1063/1.1566438

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The mechanism for the internal conversion of adenine was investigated by femtosecond pump-probe transient ionization time-of-flight mass spectrometry. In particular, we tried to determine which of the npi* and pisigma* states was responsible for the ultrafast decay of adenine by comparing the dynamics of adenine and its several derivatives with methyl or deuterium substitution. Adenine and all its derivatives studied here had more or less the same decay time of similar to1 ps at the excitation energy of 37 500 cm(-1). These results provide compelling evidence that the npi* state, rather than the pisigma* state, plays the role of a doorway state for internal conversion via a conical intersection to the ground state. (C) 2003 American Institute of Physics.

引用

页码：6717 / 6719

页数：3

共 22 条

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