Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5404297 | Journal of Luminescence | 2006 | 8 Pages |
Abstract
Solvatochromic effects on the fluorescence behavior of 7-hydroxy-4-methyl-8-(4â²-methyl-piperazine-1â² yl)methylcoumarin (HMMC) was studied in different solvents. The fluorescence of HMMC was found to be highly sensitive to both the polarity and the protic character of the solvent. Exploiting the polarity-sensitive fluorescence property of HMMC, its excited-state dipole moment has been determined. Fluorescence (Förster) resonance energy transfer (FRET) process from HMMC to a potent bioactive molecule 3-acetyl-4-oxo-6,7-dihydro-12Â H indolo-[2,3-a] quinolizine (AODIQ) was studied. From the determined KSV and R0 values, it is argued that a long-range dipole-dipole interaction is operating for the energy transfer mechanism. The energy transfer efficiency (E) and the distance between the acceptor and the donor (r0) have been determined.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Arabinda Mallick, Basudeb Haldar, Saumitra Sengupta, Nitin Chattopadhyay,