A Low Band Gap Polymer Based on Selenophene and Benzobis(thiadiazole)

A new derivative of benzobis(thiadiazole) based donor–acceptor–donor type monomers, namely 4,7-di(selenophen-2-yl)benzo[1,2-c;4,5-c']bis[1,2,5]thiadiazole (SeBTSe), was synthesized and its polymerization was carried out successfully via electrochemical polymerization in an electrolyte solution...

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Bibliographic Details
Published inElectrochimica acta Vol. 249; pp. 189 - 197
Main Authors Abdulrazzaq, Mohammed, Ozkut, Merve Icli, Gokce, Gurcan, Ertan, Salih, Tutuncu, Esra, Cihaner, Atilla
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 20.09.2017
Elsevier BV
Subjects
Ambipolar
Band gap
Benzobis(thiadiazole)
Chemical synthesis
Dichloromethane
Donor-Acceptor-Donor
Electrochemical analysis
Electrochromic
Electrochromism
Electropolymerization
Monomers
Oxidation
Polymerization
Polymers
Selenophene
Thiadiazoles
Benzobis(thiadiazole)
Ambipolar
Electrochromic
Electropolymerization
Donor-Acceptor-Donor
Selenophene
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Summary:A new derivative of benzobis(thiadiazole) based donor–acceptor–donor type monomers, namely 4,7-di(selenophen-2-yl)benzo[1,2-c;4,5-c']bis[1,2,5]thiadiazole (SeBTSe), was synthesized and its polymerization was carried out successfully via electrochemical polymerization in an electrolyte solution of 0.1M tetrabutylammonium hexafluorophosphate dissolved in dichloromethane. The monomer SeBTSe is a deep red chromophore and it has four redox states: one oxidation, one neutral and two reduction states.The electrochemical behaviour of the corresponding polymer called PSeBTSe was studied by cyclic and differential pulse voltammetry. There is a good agreement between electrochemical (0.62-0.66eV) and optical (0.63eV) bandgaps of the polymer. Like the monomer, the ambipolar polymer has four redox states and electrochromic properties:gray beige at neutral state, smoky azurite at oxidized state, beige at first reduced state and dark beige at second reduced state.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.08.007