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Tuning the HOMO energy levels in quinoline and biquinoline based donor-acceptor polymers

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dc.contributor.author Tomar, Manisha
dc.contributor.author Ashar, A. Z.
dc.contributor.author Narayan, K. S.
dc.contributor.author Muellen, Klaus
dc.contributor.author Jacob, Josemon
dc.date.accessioned 2017-01-24T06:24:25Z
dc.date.available 2017-01-24T06:24:25Z
dc.date.issued 2016
dc.identifier.citation Tomar, M.; Ashar, A. Z.; Narayan, K. S.; Mullen, K.; Jacob, J., Tuning the HOMO energy levels in quinoline and biquinoline based donor-acceptor polymers. Journal of Polymer Research 2016, 23 (3), 9 http://dx.doi.org/10.1007/s10965-016-0945-1 en_US
dc.identifier.citation Journal of Polymer Research en_US
dc.identifier.citation 23 en_US
dc.identifier.citation 3 en_US
dc.identifier.issn 1022-9760
dc.identifier.uri https://libjncir.jncasr.ac.in/xmlui/10572/2139
dc.description Restricted Access en_US
dc.description.abstract Four donor-acceptor type polymers based on quinoline and biquinoline have been synthesized by Pd catalyzed direct C-H (hetero)arylation reaction. Polymers P1 and P2 are alternate copolymers of thiophene-benzothiadiazole-thiophene (TBTT) unit with quinoline and biquinoline unit, respectively. P3 is a random copolymer containing cyclopentadithiophene (CPDT), benzothiadiazole and quinoline moieties in the backbone whereas P4 contains CPDT unit with randomly distributed benzothiadiazole and biquinoline units. All the polymers show good thermal stability and solubility in common organic solvents. CPDT based polymers P3 and P4 exhibit higher absorbance maxima, higher lying Highest Occupied Molecular Orbital (HOMO) energy levels and smaller band gap as compared to thiophene based polymers P1 and P2 as a result of better electron-donating ability of the former leading to stronger intramolecular charge transfer. Also, quinoline based polymers P1 and P3 show a redshift in the absorbance maxima compared to biquinoline based polymers P2 and P4, respectively due to non-planar transoid conformation of the two quinoline rings in the biquinoline unit. It is found that the use of N-heterocycle based comonomers allows the tuning of the HOMO level over a remarkably wide range (similar to 0.8 eV). Additionally, the use of quinoline or biquinoline along the conjugated chain leads to deeper lying HOMO levels suggesting good oxidative stability for this class of materials. en_US
dc.description.uri 1572-8935 en_US
dc.description.uri http://dx.doi.org/10.1007/s10965-016-0945-1 en_US
dc.language.iso English en_US
dc.publisher Springer en_US
dc.rights @Springer, 2016 en_US
dc.subject Polymer Science en_US
dc.subject Quinoline en_US
dc.subject Biquinoline en_US
dc.subject Donor-acceptor en_US
dc.subject Cyclopentadithiophene en_US
dc.subject 2,1,3-benzothiadiazole en_US
dc.subject Optical properties en_US
dc.subject Heterojunction Solar-Cells en_US
dc.subject Band-Gap Polymers en_US
dc.subject Conjugated Polymers en_US
dc.subject Electrochemical Properties en_US
dc.subject Optoelectronic Properties en_US
dc.subject Organic Photovoltaics en_US
dc.subject Facile Synthesis en_US
dc.subject Copolymers en_US
dc.subject Systems en_US
dc.subject Electroluminescence en_US
dc.title Tuning the HOMO energy levels in quinoline and biquinoline based donor-acceptor polymers en_US
dc.type Article en_US


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