Application of the Kramers equation to the formation of an intramolecular excimer state

✍ Scribed by Kimihiko Hara; Seiji Akimoto; Hideo Suzuki

• Publisher: Elsevier Science
• Year: 1990
• Tongue: English
• Weight: 492 KB
• Volume: 175
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(90)85570-3

✦ Synopsis

The viscosity dependence of the formation rate of the intramolecular excimer state in 1,3di( 1-pyrenyl)propane (DPP) is determined by measurements of fluorescence lifetimes. The data are represented by one universal curve, irrespective of solvents, which can be fitted quite well by a full Kramers equation over the viscosity range higher than circa 3.0 cP. The results demonstrate strong support for our previous discussion. On the basis of the hydrodynamic parameters derived from this fitting and the activation parameters thus obtained, the utility of the Kramers theory is discussed.