Photophysical processes of merocyanine 540 in solutions and in organized media

被引：52

作者：

Mandal, D ^{[1
]}

Pal, SK ^{[1
]}

Sukul, D ^{[1
]}

Bhattacharyya, K ^{[1
]}

机构：

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

来源：

JOURNAL OF PHYSICAL CHEMISTRY A | 1999年 / 103卷 / 41期

关键词：

D O I：

10.1021/jp991506a

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：

Photophysical processes of merocyanine 540 (MC540) are studied using picosecond time-resolved emission spectroscopy. The nonradiative rate of MC540 increases from 0.32 x 10(9) s(-1) in dioxane to 8.73 x 10(9) s(-1) in water, i.e., nearly 27 times. This is attributed to the decrease in the barrier of: photoisomerization with increase in polarity and the consequent increase in the rate of pl lotoisomerization for MC540. The polarity-dependent isomerization is also shown to be the cause for the observed increase in emission intensity and lifetime of MC540 in aerosol-OT microemulsions and aqueous bovine serum albumin solutions.

引用

页码：8156 / 8159

页数：4

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