Nonlinear optical studies on new conjugated poly{2,2 l-(3,4- dialkoxythiophene-2,5-diyl) bis[5-(2-thienyl)-1,3,4-oxadiazole]}s

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dc.contributor.authorHegde, P.K.
dc.contributor.authorVasudeva Adhikari, A.V.
dc.contributor.authorManjunatha, M.G.
dc.contributor.authorSuchand Sandeep, C.S.
dc.contributor.authorPhilip, R.
dc.date.accessioned2026-02-05T09:36:14Z
dc.date.issued2010
dc.description.abstractThree new donor-acceptor type poly{2,2 1-(3,4-dialkoxythiophene- 2,5-diyl)bis[5-(2-thienyl)-1,3,4-oxadiazole]}s (P1, P2, and P3) were synthesized starting from thiodiglycolic acid and diethyl oxalate through multistep reactions. The polymerization was carried out using chemical polymerization technique. The optical and charge-transporting properties of the polymers were investigated by UV-visible, fluorescence emission spectroscopic and cyclic voltammetric studies. The polymers showed bluish-green fluorescence in solutions. The electrochemical band gaps were determined to be 2.03, 2.09, and 2.17 eV for P1, P2, and P3, respectively. The nonlinear optical properties of new polymers were investigated at 532 nm using single beam Z-scan and degenerate four-wave mixing (DFWM) techniques with nanosecond laser pulses. The polymers exhibited strong optical limiting behavior due to "effective" three-photon absorption. Values of the effective three-photon absorption (3PA) coefficients, thirdorder nonlinear susceptibilities (? (3)), and figures (F) of merit were calculated. © 2010 Wiley Periodicals, Inc.
dc.identifier.citationJournal of Applied Polymer Science, 2010, 117, 5, pp. 2641-2650
dc.identifier.issn218995
dc.identifier.urihttps://doi.org/10.1002/app.30926
dc.identifier.urihttps://idr.nitk.ac.in/handle/123456789/27413
dc.subject3,4-dialkoxythiophene
dc.subjectBand gaps
dc.subjectChemical polymerization
dc.subjectDegenerate four-wave mixing
dc.subjectDiethyl oxalates
dc.subjectDonor-acceptors
dc.subjectFluorescence emission
dc.subjectGreen fluorescence
dc.subjectMultistep reactions
dc.subjectNanosecond laser pulse
dc.subjectNon-linear optical properties
dc.subjectNonlinear optical studies
dc.subjectOptical limiting behavior
dc.subjectOxadiazoles
dc.subjectSingle beam
dc.subjectThienyl
dc.subjectThiodiglycolic acid
dc.subjectThird-order nonlinear susceptibility
dc.subjectThree photon absorption
dc.subjectThree-photon absorption (3PA)
dc.subjectUV-visible
dc.subjectVoltammetric studies
dc.subjectAbsorption
dc.subjectFluorescence
dc.subjectFour wave mixing
dc.subjectLight absorption
dc.subjectMultiphoton processes
dc.subjectOptical properties
dc.subjectPhotons
dc.subjectPolymerization
dc.subjectPulsed laser applications
dc.subjectBiodegradable polymers
dc.subjectchemical composition
dc.subjectfluorescence
dc.subjectlaser
dc.subjectpolymerization
dc.subjectsynthesis
dc.subjecttransport process
dc.titleNonlinear optical studies on new conjugated poly{2,2 l-(3,4- dialkoxythiophene-2,5-diyl) bis[5-(2-thienyl)-1,3,4-oxadiazole]}s

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