TWISTED INTERNAL CHARGE-TRANSFER IN (AMINOPHENYL)PYRIDINIUM

被引:79
作者
FROMHERZ, P
HEILEMANN, A
机构
[1] Abteilung Biophysik, Universität Ulm
关键词
D O I
10.1021/j100196a004
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 electron donor dimethylaniline and the electron acceptor methylpyridinium are coupled with a twistable bond as [(dimethylamino)phenyl]methylpyridinium and in the rigid frame of fluorene as (dimethylamino)methylazafluorenium. The fluorescence of both chromophores is studied. The quantum yield of the rigid dye is around 50%. The quantum yield of the twistable homolog is low. It drops to about 0.05% in solvents of high polarity and fluidity. The difference is assigned to the formation of a TICT state (twisted internal charge transfer) with efficient radiationless deactivation.
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页码:6864 / 6866
页数:3
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