Neutral-State Green Conjugated Polymers from Pyrrole Bis-Substituted Benzothiadiazole and Benzoselenadiazole for Electrochromic Devices

Baran D., Oktem G., Celebi S., TOPPARE L. K.

MACROMOLECULAR CHEMISTRY AND PHYSICS, cilt.212, sa.8, ss.799-805, 2011 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 212 Sayı: 8
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1002/macp.201000744
  • Dergi Adı: MACROMOLECULAR CHEMISTRY AND PHYSICS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.799-805
  • Anahtar Kelimeler: benzoselenadiazole, benzothiadiazole, conjugated polymers, electrochromism, pyrroles, DONOR-ACCEPTOR APPROACH, SOLAR-CELLS, ELECTROCHEMICAL PROPERTIES, COPOLYMERS, THIOPHENE, MOIETY, UNIT, GAP, RED
  • Orta Doğu Teknik Üniversitesi Adresli: Evet

Özet

Two donor/acceptor/donor-type pyrrole-incorporated monomers, 4,7-di(1H-pyrrol-2-yl)benzo[c][1,2,5]thiadiazole (M1) and 4,7-di(1H-pyrrol-2-yl) benzo[c][1,2,5] selenadiazole (M2), were synthesized and polymerized electrochemically. The resulting polymers (P1 and P2) were investigated in terms of their electrochromic and optical properties. Spectroelectrochemistry studies revealed that both polymers show two distinct absorptions in both red and blue regions. The absorptions at around 400 and 700 nm correspond to neutral-state green polymers P1 and P2, which is a unique property for conjugated polymers. Optical band gaps were calculated as 1.12 and 1.08 eV for P1 and P2, respectively.