[The medium effects on fluorescence of coumarin-1 complexes].
The fluorescence spectra of 4-methyl-7-diethylaminocoumarin (coumarin-1) in cyclohexane-alcohol, 1, 4-dioxane-water binary mixed solvents and cyclodextrin, surfactant aqueous solutions were studied in detail. The reasons that fluorescence spectrum of coumarin-1 is very sensitive to environmental polar change were discussed based on solvent-solute molecule hydrogen bond and its effects on formation of nonradiative twisted intramolecular charge transfer (TICT) state for the fluorescence probe. In the meanwhile, it' s inclusion constant with CD and bonding constant with surfactan micella were determined.
Chen
Y
Y
Department of Chemistry, Tsinghua University, 100084 Beijing.
Li
L
L
Tong
A
A
D003374:Coumarins / Q000737:chemistry*; D003510:Cyclohexanes / Q000737:chemistry; D004146:Dioxanes / Q000737:chemistry; D008823:Micelles; D012997:Solvents / Q000737:chemistry; D013050:Spectrometry, Fluorescence / Q000379:methods*; D014867:Water / Q000737:chemistry; D047392:beta-Cyclodextrins / Q000737:chemistry
D003374:Coumarins; D003510:Cyclohexanes; D004146:Dioxanes; D008823:Micelles; D012997:Solvents; D047392:beta-Cyclodextrins; D014867:Water