Photoinduced proton transfer in the excited singlet state of 3,7-dihydroxynaphthoic acid and solvent effect

被引：8

作者：

Banerjee, D ^{[1
]}

Mandal, A ^{[1
]}

Mukherjee, S ^{[1
]}

机构：

[1] Indian Assoc Cultivat Sci, Dept Phys Chem, Kolkata 700032, W Bengal, India

来源：

CHEMICAL PHYSICS LETTERS | 2002年 / 357卷 / 5-6期

关键词：

D O I：

10.1016/S0009-2614(02)00532-8

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 photophysics of 3,7-dihydroxynaphthoic acid (DHNA) has been studied in different aprotic and protic solvents by steady-state and nanosecond transient emission spectroscopy Both the monomer and the dimer of DHNA have been detected in the ground as well as in excited state in dilute Solution (similar to10(-5) mol dm(-3)), A large Stokes shifted emission (similar to6500 cm(-1)) indicates that DHNA undergoes thermodynamically favourable proton transfer in the excited state. It is proposed that the added base promotes the proton transfer only in polar protic solvents. The mechanism of the static processes has been investigated by making steady-state fluorescence quenching measurements and that of the dynamic processes by nanosecond fluorescence lifetime techniques. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：450 / 456

页数：7

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