Free volume related fluorescent behavior in electron beam irradiated chalcone doped PVA

V. Ravindrachary, Ismayil, Suresh P. Nayak, Dhanadeep Dutta, P. K. Pujari

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Effect of electron irradiation on the free volume related microstructural and optical properties of chalcone doped Poly(vinyl alcohol) composite films have been studied using FTIR, UV-Visible, XRD and Positron Annihilation techniques. The FTIR spectral study shows that the irradiation induces the crosslinking within the composite. Using UV-Visible absorption spectra the optical energy band gap and activation energies were estimated and the variation of these parameters suggests the existence of defects and molecular ordering within the irradiated composite. XRD diffractograms reveal that the crosslinking enhances the crystallinity of the sample. In this cross-linked polymer composite the fluorescence enhancement has been observed in the fluorescence spectral study. The Positron annihilation result suggests that the irradiation affects the free volume properties and crosslinking hinders the chalcone chromophore molecular rotation. Under this restricted condition the chromophore molecules likely to emit enhanced fluorescence and its mobility is directly related to the free volume around it.

Original languageEnglish
Pages (from-to)1676-1686
Number of pages11
JournalPolymer Degradation and Stability
Volume96
Issue number9
DOIs
Publication statusPublished - 01-09-2011

Fingerprint

Chalcone
Free volume
Crosslinking
Electron beams
crosslinking
Positron annihilation
Fluorescence
electron beams
Chromophores
composite materials
Composite materials
positron annihilation
Irradiation
fluorescence
chromophores
Electron irradiation
Composite films
Band structure
molecular rotation
irradiation

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Polymers and Plastics
  • Materials Chemistry

Cite this

Ravindrachary, V. ; Ismayil ; Nayak, Suresh P. ; Dutta, Dhanadeep ; Pujari, P. K. / Free volume related fluorescent behavior in electron beam irradiated chalcone doped PVA. In: Polymer Degradation and Stability. 2011 ; Vol. 96, No. 9. pp. 1676-1686.
@article{b3946dfa81134e849bc215adda41e59e,
title = "Free volume related fluorescent behavior in electron beam irradiated chalcone doped PVA",
abstract = "Effect of electron irradiation on the free volume related microstructural and optical properties of chalcone doped Poly(vinyl alcohol) composite films have been studied using FTIR, UV-Visible, XRD and Positron Annihilation techniques. The FTIR spectral study shows that the irradiation induces the crosslinking within the composite. Using UV-Visible absorption spectra the optical energy band gap and activation energies were estimated and the variation of these parameters suggests the existence of defects and molecular ordering within the irradiated composite. XRD diffractograms reveal that the crosslinking enhances the crystallinity of the sample. In this cross-linked polymer composite the fluorescence enhancement has been observed in the fluorescence spectral study. The Positron annihilation result suggests that the irradiation affects the free volume properties and crosslinking hinders the chalcone chromophore molecular rotation. Under this restricted condition the chromophore molecules likely to emit enhanced fluorescence and its mobility is directly related to the free volume around it.",
author = "V. Ravindrachary and Ismayil and Nayak, {Suresh P.} and Dhanadeep Dutta and Pujari, {P. K.}",
year = "2011",
month = "9",
day = "1",
doi = "10.1016/j.polymdegradstab.2011.06.013",
language = "English",
volume = "96",
pages = "1676--1686",
journal = "Polymer Degradation and Stability",
issn = "0141-3910",
publisher = "Elsevier Limited",
number = "9",

}

Free volume related fluorescent behavior in electron beam irradiated chalcone doped PVA. / Ravindrachary, V.; Ismayil; Nayak, Suresh P.; Dutta, Dhanadeep; Pujari, P. K.

In: Polymer Degradation and Stability, Vol. 96, No. 9, 01.09.2011, p. 1676-1686.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Free volume related fluorescent behavior in electron beam irradiated chalcone doped PVA

AU - Ravindrachary, V.

AU - Ismayil,

AU - Nayak, Suresh P.

AU - Dutta, Dhanadeep

AU - Pujari, P. K.

PY - 2011/9/1

Y1 - 2011/9/1

N2 - Effect of electron irradiation on the free volume related microstructural and optical properties of chalcone doped Poly(vinyl alcohol) composite films have been studied using FTIR, UV-Visible, XRD and Positron Annihilation techniques. The FTIR spectral study shows that the irradiation induces the crosslinking within the composite. Using UV-Visible absorption spectra the optical energy band gap and activation energies were estimated and the variation of these parameters suggests the existence of defects and molecular ordering within the irradiated composite. XRD diffractograms reveal that the crosslinking enhances the crystallinity of the sample. In this cross-linked polymer composite the fluorescence enhancement has been observed in the fluorescence spectral study. The Positron annihilation result suggests that the irradiation affects the free volume properties and crosslinking hinders the chalcone chromophore molecular rotation. Under this restricted condition the chromophore molecules likely to emit enhanced fluorescence and its mobility is directly related to the free volume around it.

AB - Effect of electron irradiation on the free volume related microstructural and optical properties of chalcone doped Poly(vinyl alcohol) composite films have been studied using FTIR, UV-Visible, XRD and Positron Annihilation techniques. The FTIR spectral study shows that the irradiation induces the crosslinking within the composite. Using UV-Visible absorption spectra the optical energy band gap and activation energies were estimated and the variation of these parameters suggests the existence of defects and molecular ordering within the irradiated composite. XRD diffractograms reveal that the crosslinking enhances the crystallinity of the sample. In this cross-linked polymer composite the fluorescence enhancement has been observed in the fluorescence spectral study. The Positron annihilation result suggests that the irradiation affects the free volume properties and crosslinking hinders the chalcone chromophore molecular rotation. Under this restricted condition the chromophore molecules likely to emit enhanced fluorescence and its mobility is directly related to the free volume around it.

UR - http://www.scopus.com/inward/record.url?scp=79961022744&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=79961022744&partnerID=8YFLogxK

U2 - 10.1016/j.polymdegradstab.2011.06.013

DO - 10.1016/j.polymdegradstab.2011.06.013

M3 - Article

AN - SCOPUS:79961022744

VL - 96

SP - 1676

EP - 1686

JO - Polymer Degradation and Stability

JF - Polymer Degradation and Stability

SN - 0141-3910

IS - 9

ER -