Ultrafast excited-state proton transfer dynamics of 1,8-dihydroxyanthraquinone (chrysazin) studied by femtosecond time-resolved fluorescence spectroscopy

被引：53

作者：

Arzhantsev, SY ^{[1
]}

Takeuchi, S ^{[1
]}

Tahara, T ^{[1
]}

机构：

[1] Inst Mol Sci, Okazaki, Aichi 4448585, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2000年 / 330卷 / 1-2期

基金：

日本学术振兴会;

关键词：

D O I：

10.1016/S0009-2614(00)01087-3

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：

Femtosecond time-resolved fluorescence intensities of 1,8-dihydroxyanthraquinone (chrysazin) in hexane have been measured at room temperature for a wide visible wavelength region (470-670 nm) by using the up-conversion method. Time-resolved fluorescence spectra were reconstructed after deconvolution taking account of the finite instrumental response. It was found that both the 'normal-form type' fluorescence and the 'tautomeric-form type' fluorescence appear almost instantaneously, which indicates that a barrierless excited-state proton transfer occurs within 50 fs reflecting delocalization of the excited-state wave function. A fluorescence spectral change was also observed in a few picosecond time scale, which was assigned to an additional proton translocation induced by the intramolecular vibrational relaxation. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：83 / 90

页数：8