Fluorescence lifetime properties of near-infrared cyanine dyes in relation to their structures

被引：66

作者：

Lee, Hyeran ^{[1
]}

Berezin, Mikhail Y. ^{[1
]}

Henary, Maged ^{[2
]}

Strekowski, Lucjan ^{[2
]}

Achilefu, Samuel ^{[1
,3
]}

机构：

[1] Washington Univ, Dept Radiol, St Louis, MO 63110 USA

[2] Georgia State Univ, Dept Chem, Atlanta, GA 30302 USA

[3] Washington Univ, Dept Biochem & Mol Biophys, St Louis, MO 63110 USA

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2008年 / 200卷 / 2-3期

基金：

美国国家卫生研究院;

关键词：

Cyanine dyes; Fluorescence lifetime;

D O I：

10.1016/j.jphotochem.2008.09.008

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：

Structurally diverse near-infrared (NIR) absorbing polymethine dyes were prepared and their fluorescence lifetimes (FLT) were evaluated in relation to their structural features. Comparative FLT analysis based on the modification of methine chain length and heterocyclic system showed that indolium or benzo[e]indolium heptamethine dyes exhibited longer FIT than the benzo[c,d]indolium trimethine dye. Modification of heterocyclic system alone with an intact chain length showed that indolium-based heptamethine dyes showed approximately 30% longer FLT than the benzo[e]indolium-based dyes. In general, the FIT of polymethine dyes increased from polar to non-polar solvents. In addition, correlation study between the theoretical and the experimental FLT for indocyanine green (ICC) suggests that the lack of structural rigidity for these cyanine dyes is primarily responsible for the loss of the excited state energy via non-radiative pathway. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：438 / 444

页数：7

共 30 条

[1] Novel receptor-targeted fluorescent contrast agents for in vivo tumor imaging [J].