Citation: Ji Liang SHI, Yuan Chao ZHANG, Jia Liang GU, Fang Lin LI, Xi Kui JIANG, Nai Guang WANG, Jun De CHEN. LASER FLASH SPECTROSCOPY STUDIES OF PYRENE EXCIMER IN ACETONITRILE[J]. Chinese Chemical Letters, ;1992, 3(5): 379-382. shu

LASER FLASH SPECTROSCOPY STUDIES OF PYRENE EXCIMER IN ACETONITRILE

a Shanghai Institute of Organic Chemistry Academia Sinica 345 Ling Ling Lu Shanghai 200032;
b Laboratory of Laser Spectroscopy Anhui Institute of Optics and Fine Mechanics Academia Sinica Hefei 230031

Received Date: 15 July 1991

Formation and decay processes of pyrene excimer in acetonitrilehave been measured by laser flash spectroscopy at 475nm, and thedependence of λ₁+λ₂ on the pyrene concentration has also been measured at290^°K.On the basis of these measurements, six rate parameters whichdescribe the behaviour of pyrene excimer system in acetonitrile solutionhave been evaluated.At 355 nm laser light irradiation, the ΔG of thepyrene excimer formation in acetonitrile is evaluated to be-30.18kJ/mol.This value is quite different from the corresponding ΔG in cyclohexane(-16.72kJ/mol)
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