Sunitha, M.S.Vasudeva Adhikari, A.V.Vishnumurthy, K.A.Safakath, K.Philip, R.2026-02-052012International Journal of Polymeric Materials and Polymeric Biomaterials, 2012, 61, 7, pp. 483-504914037https://doi.org/10.1080/00914037.2011.593062https://idr.nitk.ac.in/handle/123456789/26997We present the synthesis of two newly designed, thiophene-based conjugated polymers (P1 and P2) carrying 1,3,4-oxadiazole, 3,4-dinaphthyloxy thiophene, and 3,4-dialkoxy thiophene moieties as potential NLO active materials. Their NLO properties have been investigated both by the Z-scan and degenerate four-wave mixing (DFWM) techniques using 532nm, 7 nanosecond laser pulses. The measured ? and ?(3) values for the polymers are found to be in the range of 1011m/W and 1011esu, respectively. The results indicate that they exhibit good optical-limiting behavior and are promising materials for nonlinear optical applications due to effective two-photon absorption (TPA). © 2012 Copyright Taylor and Francis Group, LLC.1 , 3 , 4-oxadiazole1 ,3 ,4-Oxadiazole moietyActive materialDegenerate four-wave mixingDonor-acceptor polymersNanosecond laser pulseNLO propertiesNonlinear optical applicationsOxadiazolesSubstituted thiopheneThird-order non-linearityTwo-photon absorptionsElectrochemical propertiesOptical materialsThiopheneTwo photon processesConjugated polymers