Study of Fluorescence Quenching on Novel Coumarin Derivatives by Aniline in Different Solvents

The steady-state fluorescence quenching of novel coumarin derivatives; 4-(2, 6-dibromo-4-methyl-phenoxymethyl)-benzo[h]chromen-2-one [DMB] and 6-methoxy-4- p -tolyoxymethyl-chromen-2-one [TMC] has been studied in toluene, benzene, dioxane, acetonitrile and tetrahydrofuran [THF] using aniline as a qu...

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Bibliographic Details
Published in:Journal of solution chemistry 2017-06, Vol.46 (6), p.1328-1336
Main Authors: Sidarai, Ashok H., Desai, Vani R., Hunagund, Shirajahammad M., Basanagouda, Mahantesha, Kadadevarmath, Jagadish S.
Format: Article
Language:English
Subjects:
Acetonitrile
Activation energy
Aniline
Benzene
Chemistry
Chemistry and Materials Science
Condensed Matter Physics
Coumarin
Derivatives
Diffusion rate
Energy consumption
Fluorescence
Geochemistry
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Mathematical analysis
Oceanography
Physical Chemistry
Quenching
Solvents
Sorption
Tetrahydrofuran
Toluene
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Summary:The steady-state fluorescence quenching of novel coumarin derivatives; 4-(2, 6-dibromo-4-methyl-phenoxymethyl)-benzo[h]chromen-2-one [DMB] and 6-methoxy-4- p -tolyoxymethyl-chromen-2-one [TMC] has been studied in toluene, benzene, dioxane, acetonitrile and tetrahydrofuran [THF] using aniline as a quencher at room temperature with a view to understanding the role of diffusion in the quenching mechanism. The probability of quenching per encounter ( p ) is calculated in all the solvents. Further, an activation energy for quenching ( E a ) was estimated using the values of p and the literature values of activation energy for diffusion ( E d ). The magnitudes of these parameters indicate that the fluorescence quenching of these molecules by aniline is not solely due to the material diffusion but there is also a contribution of an activation energy.
ISSN:0095-9782
1572-8927
DOI:10.1007/s10953-017-0645-4