Features of absorption and fluorescence spectra of prodan.

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Features of absorption and fluorescence spectra of prodan. Abstract Text:

Viktor Ya Artukhov,Oksana M Zharkova,Julia P Morozova,Viktor Ya Artukhov,Oksana M Zharkova,Julia P Morozova,

Some important and essential features of absorption and fluorescence spectra of prodan in homogeneous and binary mixes are studied. According to results obtained from experimental and quantum-chemical researches we show that the absorption spectrum of prodan in nonpolar solvent within 25,000-50,000 cm(-1) is formed by eight electronic transitions. Quantum-chemical calculations are performed in the geometry of both the ground and exited states of prodan. The rate constants of photoprocesses and the quantum yield of fluorescence are determined for the prodan and its complexes with water. A dramatic shift of the fluorescence band at changing from nonpolar solvent to isopropyl alcohol and water is explained. The roles of general solvent effects and specific interactions are separated. According to values of molecular electrostatic potential and charges on atoms the centers of possible interaction of prodan with a solvent are obtained. Possible models of prodan complexes in water are offered. The results of quantum-chemical calculation for offered complexes of prodan in water are compared with those for the free prodan molecule. The presence of the second band (about 24,000 cm(-1)) in fluorescence spectra of prodan in isopropyl (ethyl) alcohol-water solvents is explained.

Features of absorption and fluorescence spectra of prodan. Publishing Authors By Initials

VY Artukhov,OM Zharkova,JP Morozova,VY Artukhov,OM Zharkova,JP Morozova,

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Features of absorption and fluorescence spectra of prodan. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Spectrochimica acta. Part A, Molecular and biomole

VOLUME: 68

Page Numbers: 36-42

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ISSN: 1386-1425

DAY: 6

MONTH: 11

YEAR: 2006

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LANGUAGE: eng

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AFFILIATION: Tomsk State University, Russia, Tomsk-50, Lenina 36, Russian Federation.

Country: England

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MEDLINETA: Spectrochim Acta A Mol Biomol

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