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 Nanocomposite Cyclic voltammetry Nonlinear optics z-Scan 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.
URI:	http://hdl.handle.net/2289/4284
ISSN:	0379-6779
Alternative Location:	http://dx.doi.org/10.1016/j.synthmet.2010.09.038
Copyright:	2010 Elsevier B.V.
Appears in Collections:	Research Papers (LAMP)

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