Synthesis and electrochromic properties of conducting copolymers of dioxocino- and dithiocino-quinoxalines with bithiophene

Date

2006-02-15

Author

Beyazyidirim, S
Camurlu, P
Yilmaz, D
Gullu, M
Toppare, Levent Kamil

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Two new monomers, 2-benzyl-5,12-dihydro-2H-pyrrolo[3',4':2,3][1,4]dioxocino[6,7-b]quinoxaline (DPOQ) and 5,12-dihydrothieno[3',4':2,3][1,4]dithiocino[6,7-b]quinoxaline (DTTQ), were synthesized. The chemical structures of the monomers were characterized by nuclear magnetic resonance (H-1 NMR), Fourier transform infrared (FTIR) and mass spectra. Copolymer of DPOQ with bithiophene (BT) was synthesized via potentiostatic electrochemical polymerization in acetonitrile-tetrabutylammonium tetrafluoroborate solvent-electrolyte couple. For DTTQ, copolymerization with bithiophene was achieved via potentiodynamic method in dichloromethane-tetrabutylammonium hexafluorophosphate solvent-electrolyte couple. Characterizations of the resulting copolymers were performed by cyclic voltammetry (CV), FTIR, scanning electron microscopy (SEM) and LW-Vis spectroscopy. Four-probe technique was used to measure the conductivities of the samples. Moreover, the spectroelectrochemical and electrochromic properties of the copolymer films were investigated. In addition, dual type polymer electrochromic devices based oil P(DPOQ-co-BT) and P(DTTQ-co-BT) with poly(3,4-ethylenedioxythiophene) were constructed. Spectroelectrochemistry, electrochromic switching and open circuit stability of the devices were studied. They were found to have good switching times, reasonable contrasts and optical memories.

Subject Keywords

Analytical Chemistry, Electrochemistry, General Chemical Engineering

URI

https://hdl.handle.net/11511/48495

Journal

JOURNAL OF ELECTROANALYTICAL CHEMISTRY

DOI

https://doi.org/10.1016/j.jelechem.2005.11.018

Collections

Department of Chemistry, Article

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Citation Formats

S. Beyazyidirim, P. Camurlu, D. Yilmaz, M. Gullu, and L. K. Toppare, “Synthesis and electrochromic properties of conducting copolymers of dioxocino- and dithiocino-quinoxalines with bithiophene,” JOURNAL OF ELECTROANALYTICAL CHEMISTRY, pp. 235–246, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/48495.