A Camouflage Material: p- and n-Type Dopable Furan Based Low Band Gap Electrochromic Polymer and Its \EDOT\ Based Copolymer
By Emrah Kavak and Cansu N. Us and Ejmer Yavuz and Arif Kivrak and Merve ?
Published in Electrochimica Acta
2015
Abstract
A Donor-Acceptor-Donor (D-A-D) type monomer, 4,9-di(furan-2-yl)-6,7-diphenyl-[1,2,5]thiadiazolo[3,4-g]quinoxaline (1), was synthesized via Stille Coupling reaction and polymerized electrochemically. The obtained polymer (P1) has low band gap (0.85 eV) and showed electrochromic property (pale mustard-colored in neutral state, grey in oxidized state and brown in reduced state). Moreover, copolymerization of 1 was carried out with \EDOT\ for the formation of P(1-co-EDOT) which exhibits higher electrochemical stability than its homopolymer (P1) and have intriguing electrochromic property with a color change from the tunes of brown to the tunes of green. The band gap of copolymer was calculated as 1.1 eV.