Quality Control of 2,5-DibromothiopheneIn 2020 ,《star-shaped thienoviologens for electrochromism and detection of picric acid in aqueous medium》 was published in Dyes and Pigments. The article was written by Yan, Ni; Zhang, Sikun; Li, Guoping; Rao, Bin; Wei, Junji; Wei, Zengsu; Xu, Liang; He, Gang. The article contains the following contents:
Two star-shaped thienoviologens with good redox and emission properties are reported. The results indicate that the increasing number of thiophene rings can strongly weaken the electron-accepting ability and make its first reduction wave shifted to more neg. position, accompanying the decrease of the fluorescence quantum yield. The star-shaped thienoviologens were used as electroactive materials to fabricate electrochromic devices, which showed three-color changes modulated by the different voltages. The star-shaped thienoviologens were used to detect the picric acid (PA) in aqueous medium with good sensitivity and selectivity (Ksv,5a = 1.94 x 105 L/mol; Ksv,5b = 5.38 x 104 L/mol) due to their special mol. architecture and cathodic conjugated scaffold. In the experimental materials used by the author, we found 2,5-Dibromothiophene(cas: 3141-27-3Quality Control of 2,5-Dibromothiophene)
2,5-Dibromothiophene(cas: 3141-27-3) , is mainly used as pharmaceutical intermediate and synthesis intermediate. 2,5-Dibromothiophene polymerizes by debromination with magnesium catalyzed by nickel compounds to form poly(2,5- thienylene) .Quality Control of 2,5-Dibromothiophene
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary