Studies on fluorescent PVA + PVP + MPDMAPP composite films

R. F. Bhajantri, V. Ravindrachary, Boja Poojary, Ismayil, A. Harisha, Vincent Crasta

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Polymer blends along with 1-(4-methylphenyl)-3-(4-A/,A/, dimethyl amino phenyl)-2-propen-1-one (MPDMAPp) NLO-chromophore-doped composite films were prepared by solvent casting method using DMF. The optical properties were studied using UV-visible, refractive index, steady state fluorescence, and fluorescence microscopic imaging techniques. The UV-vis absorption spectra showed three absorption bands and were assigned to localized n -π&z.ast;, n - π&z.ast; inter band, and π - π&z.ast; transition of charge transfer groups. The observed changes in the absorption peak, edges, and intensity with dopant concentration are understood based on charge transfer complex (CTC) formation. The refractive indices of the composite films varied from 1.4937-1.5398 for red and 1.5165-1.5516 for green light respectively. The steady state fluorescence data showed both emission peak wavelengths and intensity changes with MPDMAPP doping level in blend. The fluorescence anisotropy (r) variations in the composite films indicate the suppressed molecular motion of MPDMAPP in the solid composite film. The fluorescence microscopic image of these composite films showed that the films are photochromatic in nature. These modified properties are thought to be due to the charge transfer upon excitation from the donor to the acceptor connected through benzene ring and CTC formation.

Original languageEnglish
Pages (from-to)903-909
Number of pages7
JournalPolymer Engineering and Science
Volume49
Issue number5
DOIs
Publication statusPublished - 01-05-2009

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Composite films
Fluorescence
Charge transfer
Absorption spectra
Refractive index
Doping (additives)
Methyl Green
Polymer blends
Chromophores
Benzene
Casting
Anisotropy
Optical properties
Imaging techniques
Wavelength

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry
  • Polymers and Plastics

Cite this

Bhajantri, R. F., Ravindrachary, V., Poojary, B., Ismayil, Harisha, A., & Crasta, V. (2009). Studies on fluorescent PVA + PVP + MPDMAPP composite films. Polymer Engineering and Science, 49(5), 903-909. https://doi.org/10.1002/pen.21341
Bhajantri, R. F. ; Ravindrachary, V. ; Poojary, Boja ; Ismayil ; Harisha, A. ; Crasta, Vincent. / Studies on fluorescent PVA + PVP + MPDMAPP composite films. In: Polymer Engineering and Science. 2009 ; Vol. 49, No. 5. pp. 903-909.
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Bhajantri, RF, Ravindrachary, V, Poojary, B, Ismayil, Harisha, A & Crasta, V 2009, 'Studies on fluorescent PVA + PVP + MPDMAPP composite films', Polymer Engineering and Science, vol. 49, no. 5, pp. 903-909. https://doi.org/10.1002/pen.21341

Studies on fluorescent PVA + PVP + MPDMAPP composite films. / Bhajantri, R. F.; Ravindrachary, V.; Poojary, Boja; Ismayil; Harisha, A.; Crasta, Vincent.

In: Polymer Engineering and Science, Vol. 49, No. 5, 01.05.2009, p. 903-909.

Research output: Contribution to journalArticle

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Bhajantri RF, Ravindrachary V, Poojary B, Ismayil, Harisha A, Crasta V. Studies on fluorescent PVA + PVP + MPDMAPP composite films. Polymer Engineering and Science. 2009 May 1;49(5):903-909. https://doi.org/10.1002/pen.21341