ANNIHILATION DELAYED FLUORESCENCE OF INDOLE AND ITS DERIVATIVES IN AQUEOUS SOLUTION
Abstract
Spectral-kinetic characteristics of annihilation delayed fluorescence (ADF) of indole and its derivatives (5-methylindole, N-methylindole) in aqueous solution at room temperature were measured. ADF spectra of indole and 5-methylindole consist of two bands with wavelength maximum at 350 and 425 nm for indole and 350 and 390 nm for 5-methylindole. The shortwave band is due to the ADF of monomers and coincides with the spectrum of the fast fluorescence. The longwave band is attributed to ADF of excimers, excited singlet states of which are populated due to annihilation of triplet excimers. Triplet states of excimers are formed due to collisions of molecules in the triplet and ground states. ADF spectrum of 5-methylindole consists of only shortwave band of ADF of monomers with the wavelength maximum at 350 nm. Triplet state lifetimes of monomers and excimers were estimated from the ADF kinetics.
About the Author
A. A. Sukhodola
B. I. Stepanov Institute of Physics, National Academy of Sciences of Belarus
Russian Federation
Russian Federation
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Review
For citations:
Sukhodola A.A. ANNIHILATION DELAYED FLUORESCENCE OF INDOLE AND ITS DERIVATIVES IN AQUEOUS SOLUTION. Zhurnal Prikladnoii Spektroskopii. 2017;84(6):870-876. (In Russ.)
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