Energy transfer in condensed systems - The effect of phase organization

被引:17
作者
Bacchiocchi, C
Zannoni, C
机构
[1] Dipto. di Chim. Fisica ed Inorganica, Università, 40136 Bologna, Viale Risorgimento
关键词
D O I
10.1016/S0009-2614(97)00215-7
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
We investigate the effects that a phase transformation, from isotropic to orientationally (nematic) and positionally (smectic) ordered mesophases, has on the energy transfer process between solute molecules. We combine Metropolis Monte Carlo simulations and a master equation approach to study radiationless energy transfer processes in three-dimensional ordered systems of identical uniaxial particles interacting via the Gay-Berne potential. The time-dependent excitation probability and the fluorescence anisotropy decay curves show an enhanced energy transfer in systems with a higher degree of order. We also find a non-isotropic evolution of the time-dependent excitation probability in systems with positional as well as orientational order, with a faster energy transfer in the smectic planes. (C) 1997 Elsevier Science B.V.
引用
收藏
页码:541 / 548
页数:8
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