Role of diffusion in excitation energy transfer and migration

被引:22
作者
Misra, V. [1 ]
Mishra, H. [1 ]
机构
[1] Kumaon Univ, Dept Phys, Photophys Lab, Naini Tal 263001, India
关键词
D O I
10.1063/1.2762211
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
Effect of diffusion on excitation energy transfer and migration in a dye pair sodium fluorescein (donor) and Rhodamine-6G (acceptor) has been studied for different viscosities by both steady state and time domain fluorescence spectroscopic measurements. The donor-donor interaction appears to be weaker as compared to donor-acceptor interaction and thus favors direct Forster-type energy transfer. Interestingly, at low viscosity (water in this case) transfer appears to be controlled by material diffusion/energy migration. Further, acceptor dynamics reveals the fact that direct Forster transfer dominates in viscous media.
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页数:10
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