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黄芩素激发态分子内质子转移耦合电荷转移反应的实验和理论研究

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Indexed by:期刊论文

Date of Publication:2014-01-01

Journal:化学物理学报

Included Journals:CSCD

Volume:27

Issue:1

Page Number:52-56

ISSN No.:1674-0068

Key Words:激发态分子内质子转移; 分子内电荷转移; 含时密度泛函; 暗态; 黄芩素

Abstract:通过稳态光谱实验和量子化学计算相结合,研究了黄芩素激发态质子转移耦合电荷转移的反应.实验和计算中S_1态吸收峰的缺失表明S_l态是暗态.S_1暗
   态导致在实验中观察不到黄芩素在乙醇溶液中的荧光峰,且固体的荧光峰很弱.黄芩素分子的前线分子轨道和电荷差异密度表明S_1态是电荷转移态,然而S_2
   态是局域激发态.计算的黄芩素分子的势能曲线在激发态只有一个稳定点,这表明了黄芩素激发态分子内质子转移的过程是一个无能垒的过程.

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