ELECTRON AND SINGLET ENERGY-TRANSFER IN RIGID SUPRAMOLECULAR SYSTEMS

被引:24
作者
CLAYTON, AHA
GHIGGINO, KP
LAWSON, JM
PADDONROW, MN
机构
[1] UNIV MELBOURNE,SCH CHEM,PHOTOPHYS LAB,PARKVILLE,VIC 3052,AUSTRALIA
[2] UNIV NEW S WALES,SCH CHEM,KENSINGTON,NSW 2033,AUSTRALIA
基金
澳大利亚研究理事会;
关键词
D O I
10.1016/1010-6030(94)01044-7
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
Fluorescence spectroscopic measurements are reported on the N,N-dimethylaniline-{polynorbornyl (4, sigma-bonds)}-dimethoxynaphthalene (DMA[4]DMN[2]) dyad and the H-isomer of the trichromophore N,N-dimethylaniline-{polynorbornyl (4, sigma-bonds)}-dimethoxynaphthalene-{polynorbornyl (8, sigma-bonds)}-dicyanovinyl (DMA[4]DMN[8]-DCV) to probe electron transfer (ET) and singlet energy transfer (EnT) in these novel systems. In acetonitrile, the DMA[4]DMN[2] dyad is shown to undergo rapid and complete photoinduced ET following excitation of DMA and DMN chromophores. In n-hexane, very little ET is apparent for DMA[4]DMN[2] and this allows the observation of a very efficient singlet EnT process from locally excited DMA to the lowest DMN singlet excited state. A mode of vectorial excitation EnT from locally excited DMA to DMN followed by ET from DMN to DCV is observed for DMA[4]DMN[8]DCV in n-hexane.
引用
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页码:323 / 331
页数:9
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