Conformational Effects on the Dynamics of Internal Conversion in Boron Dipyrromethene Dyes in Solution

被引：36

作者：

Hedley, Gordon J. ^{[1
]}

Ruseckas, Arvydas ^{[1
]}

Harriman, Anthony ^{[2
]}

Samuel, Ifor D. W. ^{[1
]}

机构：

[1] Univ St Andrews, Sch Phys & Astron, SUPA, Organ Semicond Ctr, St Andrews KY16 9SS, Fife, Scotland

[2] Newcastle Univ, Sch Chem, Mol Photon Lab, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION | 2011年 / 50卷 / 29期

基金：

英国工程与自然科学研究理事会;

关键词：

emission spectroscopy; kinetics; laser chemistry; photophysics; time-resolved spectroscopy; ELECTRONIC-ENERGY TRANSFER; S-2; STATE; FLUORESCENCE; COMPLEXES; DEPENDENCE; PHOTOLYASE; MOLECULES; VISCOSITY;

D O I：

10.1002/anie.201101219

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Twisting the light away: Internal conversion between the S2 and S1 excited singlet states is rapid in the target dyes (see picture) but shows a clear sensitivity to rotational flexibility of the meso-phenyl ring. Steric crowding by methyl groups at the 4,7-positions leads to a curved S 2 potential-energy surface punctured with nonlocal pinholes coupled to the S1 surface. Removal of these groups flattens the potential-energy surface, promoting barrierless crossing to the S1 surface. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

引用

页码：6634 / 6637

页数：4

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