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Quinolinyl‐moiety‐containing 3‐ester‐substituted polythiophenes showing fluorescence efficiency
Author(s) -
Maiti Jatindranath,
Srivastava Ritu,
Kamalasanan Modeeparampil N,
Dolui Swapan Kumar
Publication year - 2011
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.3036
Subject(s) - polythiophene , moiety , thiophene , cyclic voltammetry , polymerization , thermogravimetric analysis , photochemistry , polymer , gel permeation chromatography , materials science , polymer chemistry , differential scanning calorimetry , conductive polymer , fourier transform infrared spectroscopy , fluorescence , chemistry , organic chemistry , electrochemistry , chemical engineering , electrode , physics , quantum mechanics , engineering , thermodynamics
Abstract Polythiophenes with ester substituents at the 3‐position of the thiophene ring were synthesized by ferric chloride oxidative polymerization. The polythiophenes are partially soluble in tetrahydrofuran, and these solutions were used to characterize the polythiophenes using Fourier transform infrared, 1 H NMR, UV‐visible and fluorescence spectroscopy, gel permeation chromatography, thermogravimetric analysis, differential scanning calorimetry and cyclic voltammetry. The electrochemical band gap of the polymers is in the range 1.6–2.3 eV. The effect of the various substituents on the fluorescence behaviour was studied in detail. The quinolinyl‐moiety‐containing polythiophene ester has the highest fluorescence quantum yield. The incorporation of Al 3+ and Zn 2+ ions increases greatly the fluorescence intensity. The electroluminescence properties of the polymers were evaluated with a device configuration of ITO/PEDOT:PSS/polymer/LiF/Al. The polymers show a yellow emission in electroluminescence spectra. The results suggest that the quinoline‐containing ester‐substituted polythiophene is a promising electronic and optoelectronic material. Copyright © 2011 Society of Chemical Industry