TRIPLET ENERGY-TRANSFER OF THE INTRAMOLECULAR SYSTEM HAVING BENZOPHENONE AND DIBENZ[B,F]AZEPINE AT THE CHAIN ENDS - CHAIN-LENGTH DEPENDENCE

被引：20

作者：

KATAYAMA, H ^{[1
]}

MARUYAMA, S ^{[1
]}

ITO, S ^{[1
]}

TSUJII, Y ^{[1
]}

TSUCHIDA, A ^{[1
]}

YAMAMOTO, M ^{[1
]}

机构：

[1] KYOTO UNIV,FAC ENGN,DEPT POLYMER CHEM,SAKYO KU,KYOTO 606,JAPAN

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 09期

关键词：

D O I：

10.1021/j100162a009

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：

Intramolecular triplet-triplet energy transfer in a series of polymethylene chains having a benzophenone (BP) group as an energy donor and a dibenz[b,f]azepine (DBA) group as an energy acceptor (BP-O(CH2)nCO-DBA) has been studied by phosphorescence measurement and nanosecond laser photolysis. In a rigid solution and PMMA matrix, the quantum yield of triplet-triplet energy transfer is close to unity for the chain lengths shorter than n = 5. On the basis of the through-space mechanism of energy transfer, phosphorescence decay curves were analyzed by Dexter's equation in which the distribution of donor-acceptor distance was calculated by the conformational energy analysis. The results of the simulation were in fairly good agreement with the experimentally observed decay curves. The rate constant of triplet-triplet energy transfer is strongly dependent on the chain length, i.e., about one-tenth decrease per every methylene unit, and the rate is much smaller than that of singlet-singlet energy transfer.

引用

页码：3480 / 3486

页数：7

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