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

被引：40
作者：
Ravindrachary, V. [1 ]
Ismayil [1 ,2 ]
Nayak, Suresh P. [3 ]
Dutta, Dhanadeep [4 ]
Pujari, P. K. [4 ]
机构：
[1] Mangalore Univ, Dept Phys, Mangalagangothri 574199, Karnataka, India
[2] Manipal Univ, MIT, Dept Phys, Manipal 576104, Karnataka, India
[3] Mangalore Univ, Dept Chem, Mangalagangothri 574199, Karnataka, India
[4] Bhabha Atom Res Ctr, Div Radiochem, Bombay 400085, Maharashtra, India
来源：
POLYMER DEGRADATION AND STABILITY | 2011年 / 96卷 / 09期
关键词：
Poly(vinyl alcohol) (PVA); Electron irradiation; Free volume; Crosslinking; Fluorescence; POSITRON-ANNIHILATION; SPECTROSCOPY; POLYETHYLENE;
D O I：
10.1016/j.polymdegradstab.2011.06.013
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
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. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1676 / 1686
页数：11
相关论文
共 33 条
[1]   FREE-VOLUME SENSING FLUORESCENT-PROBES [J].
ALHASSAN, KA ;
RETTIG, W .
CHEMICAL PHYSICS LETTERS, 1986, 126 (3-4) :273-279
[2]   THE ROLE OF FREE-VOLUME IN THE TWISTED INTRAMOLECULAR CHARGE-TRANSFER (TICT) EMISSION OF DIMETHYLAMINOBENZONITRILE AND RELATED-COMPOUNDS IN RIGID POLYMER MATRICES [J].
ALHASSAN, KA ;
AZUMI, T .
CHEMICAL PHYSICS LETTERS, 1988, 146 (1-2) :121-124
[3]   Amphiphilic phenyl-ethynylene polymers and copolymers. Synthesis, characterization, and optical emission properties [J].
Arias-Marin, E ;
Le Moigne, J ;
Maillou, T ;
Guillon, D ;
Moggio, I ;
Geffroy, B .
MACROMOLECULES, 2003, 36 (10) :3570-3579
[4]   Electron beam and gamma irradiation effects on high density polyethylene studied via positron annihilation lifetime spectroscopy [J].
Badia, A ;
Duplâtre, G .
RADIATION PHYSICS AND CHEMISTRY, 1999, 54 (02) :151-158
[5]   Effect of barium chloride doping on PVA microstructure: positron annihilation study [J].
Bhajantri, R. F. ;
Ravindrachary, V. ;
Harisha, A. ;
Ranganathaiah, C. ;
Kumaraswamy, G. N. .
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING, 2007, 87 (04) :797-805
[6]   Microstructural studies on BaCl2 doped poly(vinyl alcohol) [J].
Bhajantri, R. F. ;
Ravindrachary, V. ;
Harisha, A. ;
Crasta, Vincent ;
Nayak, Suresh P. ;
Poojary, Boja .
POLYMER, 2006, 47 (10) :3591-3598
[7]   Positron annihilation studies on chalcone chromophore doped PVA [J].
Bhajantri, R. F. ;
Ravindrachary, V. ;
Harisha, A. ;
Ismayil ;
Ranganathaiah, C. .
PHYSICA STATUS SOLIDI C - CURRENT TOPICS IN SOLID STATE PHYSICS, VOL 6, NO 11, 2009, 6 (11) :2429-+
[8]   Studies on Fluorescent PVA plus PVP plus MPDMAPP Composite Films [J].
Bhajantri, R. F. ;
Ravindrachary, V. ;
Poojary, Boja ;
Ismayil ;
Harisha, A. ;
Crasta, Vincent .
POLYMER ENGINEERING AND SCIENCE, 2009, 49 (05) :903-909
[9]   TWISTED INTERNAL CHARGE-TRANSFER FLUORESCENCE OF PARA-N,N-DIMETHYLAMINOBENZONITRILE IN RIGID MATRIX AT ROOM-TEMPERATURE [J].
CAZEAUDUBROCA, C ;
PEIRIGUA, A ;
LYAZIDI, SA ;
NOUCHI, G .
CHEMICAL PHYSICS LETTERS, 1983, 98 (05) :511-514
[10]   Progress in radiation processing of polymers [J].
Chmielewski, AG ;
Haji-Saeid, M ;
Ahmed, S .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2005, 236 :44-54
1234