Free volume dependent Fluorescence property of PMMA composite: Positron Annihilation Studies

Ravindrachary, V and Praveena, S D and Bhajantri, Rajashekhar F and Ismayil, . and Crasta, Vincent (2011) Free volume dependent Fluorescence property of PMMA composite: Positron Annihilation Studies. AIP Conference Proceedings, 1512 (1). pp. 126-127.

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Abstract

The free volume related fluorescence properties of chalcone chromophore [1-(4-methylphenyl)-3-(4- N, N, dimethylaminophenyl)-2-propen-1-one doped Poly(methyl methacrylate) have been studied using fluorescence spectroscopy and Positron Annihilation lifetime spectroscopy techniques. The fluorescence spectra show that the fluorescence behavior depends on the free volume dependent polymer microstructure and varies with dopant concentration with in the composite. The origin and variation of fluorescence is understood by twisted internal charge transfer state as well as free volume. The Positron annihilation study shows that the free volume related microstructure of the composite is vary with doping level.

Item Type: Article
Uncontrolled Keywords: Fluorescence, free volume, Positron annihilation, Chromophore
Subjects: Engineering > MIT Manipal > Physics
Depositing User: MIT Library
Date Deposited: 27 Apr 2013 11:37
Last Modified: 27 Apr 2013 11:37
URI: http://eprints.manipal.edu/id/eprint/79900

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