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首页> 外文期刊>Biophysical Chemistry: An International Journal Devoted to the Physical Chemistry of Biological Phenomena >Influence of spectral heterogeneity of prodan and laurdan solutions on the transfer of electronic energy to octadecyl rhodamine B
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Influence of spectral heterogeneity of prodan and laurdan solutions on the transfer of electronic energy to octadecyl rhodamine B

机译：prodan和laurdan溶液的光谱异质性对电子向十八烷基若丹明B转移的影响

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摘要

Fluorescence quenching and resonance energy transfer have been studied by steady-state fluorescence spectroscopy. The experimental and theoretical values for the rate constants of the electronic energy transfer (k(ET)) and critical radius (R-0) were determined for prodan and laurdan as donors and octadecyl rhodamine B as acceptor. The spectroscopic data show, that prodan and laurdan in solution create an inhomogeneous spectroscopic medium in which multi-channel luminescence phenomena take place. This finding indicated that the modified form of the Stern-Volmer relation should be used for analyzing fluorescence quenching data. Results of performed studies point out, that dipole-dipole interaction is responsible for the resonance energy transfer from prodan and laurdan to octadecyl rhodamine B. The relative quenching efficiencies of both dyes depend on polarity of the medium and are higher for more polar solvent (AcN). (c) 2005 Elsevier B.V. All rights reserved.
机译：通过稳态荧光光谱研究了荧光猝灭和共振能量转移。对于prodan和laurdan作为供体，十八烷基若丹明B作为受体，确定了电子能量转移速率常数（k（ET））和临界半径（R-0）的实验和理论值。光谱数据表明，溶液中的prodan和laurdan产生了不均匀的光谱介质，在该介质中发生了多通道发光现象。这一发现表明，应将斯特恩-沃尔默关系的修改形式用于分析荧光猝灭数据。进行的研究结果指出，偶极-偶极相互作用是导致共振能量从三聚氰胺和十二烷基转移到十八烷基若丹明B的原因。两种染料的相对猝灭效率取决于介质的极性，对于极性更大的溶剂（AcN ）。 （c）2005 Elsevier B.V.保留所有权利。

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