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

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Beyazyidirim S., ÇAMURLU P., Yılmaz D., Güllü M., TOPPARE L. K.

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, cilt.587, sa.2, ss.235-246, 2006 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 587 Sayı: 2
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1016/j.jelechem.2005.11.018
  • Dergi Adı: JOURNAL OF ELECTROANALYTICAL CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.235-246
  • Anahtar Kelimeler: dioxocino and dithiocino-quinoxaline based monomers electrochemical copolymerization, conducting copolymers, electrochromism, spectroelectrochemistry, electrochromic devices, POLYMERS, DEVICES, ELECTROCHEMISTRY, DERIVATIVES
  • Akdeniz Üniversitesi Adresli: Hayır

Özet

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. (c) 2005 Elsevier B.V. All rights reserved.