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Title: Novel poly (3, 4-dialkoxythiophene) s carrying1, 3, 4-oxadiazolyl-biphenyl moieties: synthesis and nonlinear optical studies
Authors: Pramod Kumar, Hegde
Adhikari, A.V.
Manjunatha, M.G.
Suchand Sandeep, C.S.
Philip, Reji
Issue Date: 2011
Publisher: Wiley-Blackwell
Citation: Polymer International, 2011, Vol.60, p112
Abstract: Twonewdonor–acceptor typesofpolymer,poly{2-(biphenyl-4-yl)-5-[3,4-dialkoxy-5-(1,3,4-oxadiazol-2-yl)thiophen-2-yl]-1,3,4- oxadiazole}s, were synthesized starting from 2,2_-sulfanediyldiacetic acid and diethyl ethanedioate through multi-step reactions. The polymerization was carried out via the polyhydrazide precursor route. The optical and charge-transporting properties of the polymerswere investigated using UV-visible and fluorescence emission spectroscopic and cyclic voltammetric studies. The polymers showed bluish-green fluorescence in solutions. The electrochemical band gaps of the polymers were determined to be 2.16 and 2.22 eV. The nonlinear optical properties of the polymers were investigated at 532 nm using the single-beam Z-scan technique with nanosecond laser pulses. The polymers showed strong optical limiting behaviour due to effective three-photon absorption. The values of the three-photon absorption coefficients for the polymers were found to be 9 × 10−24 and 17 × 10−24 m3 W−2, which are comparable to those of good optical limitingmaterials._c 2010 Society of Chemical Industry
Description: Restricted Access. An open-access version is available at (one of the alternative locations)
ISSN: 0959-8103
1097-0126 (Online)
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Copyright: 2011 Wiley-Blackwell
Appears in Collections:Research Papers (LAMP)

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