Cimrova, Vera published the artcileDonor-acceptor copolymers containing bithiophene and dithiophenylthienothiadiazole units with fast electrochromic response, Quality Control of 52431-30-8, the publication is Journal of Materials Chemistry C: Materials for Optical and Electronic Devices (2019), 7(28), 8575-8584, database is CAplus.
New low-bandgap donor-acceptor (D-A) functional copolymers, CDTDBT and CEHTDBT, composed of a 3,3′-didodecyl-2,2′-bithiophene donor and 4,6-bis(3′-dodecylthiophene-2′-yl)thieno[3,4-c][1,2,5]thiadiazole (DT) or 4,6-bis(3′-(2-ethylhexyl)thiophene-2′-yl)thieno[3,4-c][1,2,5]thiadiazole (EHT) acceptor structural units, resp., were synthesized by Stille coupling of the corresponding comonomers. The influence of decyls or branched 2-ethylhexyls chains attached to the thiophenes of the 4,6-bis(3′-alkylthiophene-2′-yl)thieno[3,4-c][1,2,5]thiadiazole on the photophys., thermochromic, electrochem., and spectroelectrochem. properties are reported and discussed in comparison to a series of D-A copolymers with various donor units and the corresponding dithiophenylthienothiadiazole (DT or EHT) acceptor units. The new copolymers, CDTDBT and CEHTDBT, exhibit interesting electrochromic behaviors with fast response times, which reach full optical contrast in 0.3 s. These new copolymers have the potential to be used for optical switching.
Journal of Materials Chemistry C: Materials for Optical and Electronic Devices published new progress about 52431-30-8. 52431-30-8 belongs to bromides-buliding-blocks, auxiliary class Liquid Crystal &OLED Materials, name is 2,5-Dibromo-3,4-dinitrothiophene, and the molecular formula is C4Br2N2O4S, Quality Control of 52431-30-8.
Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary