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Title: Synthesis and third order optical nonlinearity studies of the donor–acceptor conjugated polymer, poly(2-[3,4-didodecyloxy-5-(1,3,4-oxadiazol-2-yl)thiophen-2-yl]-5-phenyl-1,3,4-oxadiazole) and a polymer/TiO2 nanocomposite
Authors: Murali, M.G.
Ramya, M.G.
Udayakumar, D.
Lakshmi, N.B.
Philip, Reji
Keywords: Conjugated polymers
Cyclic voltammetry
Nonlinear optics
Optical limiting
Issue Date: Dec-2010
Publisher: Elsevier B.V.
Citation: Synthetic Metals, 2010, Vol.160, p2520
Abstract: A donor-acceptor conjugated polymer (PDOThPOD) containing 3,4-didodecyloxythiophene and (1,3,4-oxadiazolyl)benzene units is synthesized by using precursor polyhydrazide route. Cyclic voltammetry studies reveal that the polymer possesses a low-lying LUMO energy level (-3.57 eV). A nanocomposite of polymer PDOThPOD and nano TiO(2) is also prepared. The linear optical properties of PDOThPOD and the nanocomposite are studied using UV-vis absorption spectroscopy and fluorescence emission spectroscopy. z-scan technique is used to study the third order nonlinear optical properties of the polymer and nanocomposite films. Both polymer and nanocomposite films show a strong optical limiting behavior. The value of nonlinear absorption coefficient (beta) is found to be of the order of 10(-7) m/W, indicating that these materials are potentially suited for fabricating optical limiters.
Description: Restricted Access.
ISSN: 0379-6779
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Copyright: 2010 Elsevier B.V.
Appears in Collections:Research Papers (LAMP)

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