Localization of a charge transfer excited state in molecular crystals: A direct confirmation by femtosecond diffuse reflectance spectroscopy

被引：38

作者：

Asahi, T

Matsuo, Y

Masuhara, H

机构：

[1] Department of Applied Physics, Osaka University, Suita

来源：

CHEMICAL PHYSICS LETTERS | 1996年 / 256卷 / 4-5期

关键词：

D O I：

10.1016/0009-2614(96)00441-1

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：

Transient absorption spectra of the durene-pyromellitic dianhydride (PMDA) charge transfer (CT) crystal, PMDA-doped durene crystal and its molten state were measured by femtosecond diffuse reflectance spectroscopy, and electronic structure and dynamics of the excited state in the CT crystal are discussed. It is directly confirmed that the excited CT singlet state is almost localized (self-trapped) in one donor(D)-acceptor(A) unit within a few picoseconds after excitation. The electronic structure of the excited state is quite polar but it is not an electron transfer state from D to A.

引用

页码：525 / 530

页数：6

共 30 条

[1] FEMTOSECOND PICOSECOND LASER PHOTOLYSIS STUDIES ON THE DYNAMICS OF EXCITED CHARGE-TRANSFER COMPLEXES - AROMATIC HYDROCARBON-ACID ANHYDRIDE, HYDROCARBON-TETRACYANOETHYLENE, AND HYDROCARBON-TETRACYANOQUINODIMETHANE SYSTEMS IN ACETONITRILE SOLUTIONS [J].