Synthesis and characterization of a new NLO-active donor–acceptor-type conjugated polymer derived from 3,4-diphenylthiophene

Manjunatha, M.G.; Adhikari, A.V.; Hegde, Pramod Kumar; Suchand Sandeep, C.S.; Philip, Reji

Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/3977

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DC Field	Value	Language
dc.contributor.author	Manjunatha, M.G.	-
dc.contributor.author	Adhikari, A.V.	-
dc.contributor.author	Hegde, Pramod Kumar	-
dc.contributor.author	Suchand Sandeep, C.S.	-
dc.contributor.author	Philip, Reji	-
dc.date.accessioned	2011-04-08T05:46:19Z	-
dc.date.available	2011-04-08T05:46:19Z	-
dc.date.issued	2010-07	-
dc.identifier.citation	Journal of Polymer Research, 2010, Vol.17, p495	en
dc.identifier.issn	1572-8935-(online)	-
dc.identifier.issn	1022-9760	-
dc.identifier.uri	http://hdl.handle.net/2289/3977	-
dc.description	Restricted Access.	en
dc.description.abstract	A new donor–acceptor-type conjugated polymer (P1) carrying 3,4-diphenylthiophene, 2,5-dihexyloxybenzene, and 1,3,4-oxadiazole units was synthesized through multistep reactions. The polymer was prepared using a polyhydrazide precursor route. The polymer has a well-defined structure and exhibits good thermal stability, with a decomposition onset temperature in nitrogen of 300 °C. Cyclic voltammetry experiments revealed that the polymer has low-lying LUMO (−3.68 eV) and high-lying HOMO (−5.78 eV) energy levels. The electrochemical band gap was found to be 2.10 eV. The UV-visible absorption spectrum of the polymer presented a maximum at 373 nm, and it displayed bluish-green fluorescence in dilute chloroform solution. The nonlinear optical properties of the new polymer were investigated at 532 nm using the Z-scan technique with nanosecond laser pulses. The polymer exhibited strong optical limiting behavior due to excited state absorption, which was phenomenologically similar to a three-photon absorption (3PA) process. The 3PA coefficient γ was found to be 7 × 10−22 m3/W2. The studies show that the new polymer (P1) is a promising material for developing efficient photonic devices.	en
dc.language.iso	en	en
dc.publisher	Springer	en
dc.relation.uri	http://dx.doi.org/10.1007/s10965-009-9336-1	en
dc.rights	2010 Springer	en
dc.subject	Donor–acceptor conjugated polymers	en
dc.subject	3,4-Diphenylthiophene	en
dc.subject	1,3,4-Oxadiazole	en
dc.subject	Electrochemical properties	en
dc.subject	NLO - 3PA	en
dc.title	Synthesis and characterization of a new NLO-active donor–acceptor-type conjugated polymer derived from 3,4-diphenylthiophene	en
dc.type	Article	en
Appears in Collections:	Research Papers (LAMP)

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