REVERSIBLE TRIPLET TRIPLET ENERGY-TRANSFER WITHIN A COVALENTLY LINKED BICHROMOPHORIC MOLECULE

被引：204
作者：
FORD, WE
RODGERS, MAJ
机构：
[1] Center for Photochemical Sciences, Department of Chemistry, Bowling Green State University, Bowling Green
来源：
JOURNAL OF PHYSICAL CHEMISTRY | 1992年 / 96卷 / 07期
关键词：
D O I：
10.1021/j100186a026
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 localized photoexcitation of a Ru(II) polypyridine complex covalently attached by a flexible link to pyrene results in a rapid intramolecular transfer of triplet energy with a forward rate constant of (1.3 +/- 0.3) x 10(8) s-1 in deaerated methanol solution. On account of the energetic proximity of the states, reverse transfer occurs with a rate constant lower by a factor of 18 +/- 3. This equilibration is rapid compared with the relaxation processes that are deactivating the system, which have a common lifetime of 11.2 +/- 0.4-mu-s. These results may be the first direct observation of an equilibrium being reached in an intramolecular triplet energy transfer reaction.
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收藏
页码：2917 / 2920
页数：4
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