Diffusion-modulated energy transfer

✍ Scribed by K.K. Pandey; T.C. Pant

• Book ID: 103028153
• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 649 KB
• Volume: 170
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(90)87123-9

✦ Synopsis

The effect of diffusion on excitation energy transfer in a dye pair (acriflavine to rhodamine 6G) in methanol has been investigated by donor-decay-curve analysis. From 300 to 200 K, for low acceptor concentration the donor fluorescence decay is exponential. The rapid energy transfer has been attributed to fast donor-donor transport due to translational diffusion of donor molecules. At higher acceptor concentrations, direct donor-acceptor transfer through the Fiirster mechanism takes place. At 80 K, the donor decay data follow a Fiirster function at all acceptor concentrations.