《Original synthesis and spectroscopic study of thiophene triazine derivatives with enhanced luminescence properties》 was written by Rodrigues, Alysson Duarte; Marcotte, Nathalie; Quignard, Francoise; Deabate, Stefano; Robitzer, Mike; Lerner, Dan A.. Synthetic Route of C4H2Br2SThis research focused onthiophene triazine preparation arylation palladium catalyst fluorescence quantum yield; Fluorescence; Fluorescent label; Oligothiophene; Palladium catalyzed C–H arylation; Thiophene; Triazine. The article conveys some information:
A straightforward access to π-conjugated oligothiophenes bearing amino-rich groups was developed. Palladium-catalyzed C-H arylation applied in the main step of the synthesis allowed to couple 2-thiophenecarbonitriles and aryl bromides with moderate to excellent yields (35-93%). Then, to improve their basic fluorescence properties, these compounds were transformed into their 2,4-diamino-1,3,5-triazine derivatives, also with good to excellent yields (74-98%). UV-Visible absorption and fluorescence studies identified a strongly emissive mol. (fluorescence quantum yield: ΦF = 0.78 ± 0.05), which could find use in sensors for applications in biol. and in material chem. We observed an antagonistic effect in the spectroscopic properties of oligothiophenes bearing 2,4-diamino-1,3,5-triazine, resulting in improved absorptive and emissive properties for more constrained structures having shorter oligothiophenes chains. After reading the article, we found that the author used 2,5-Dibromothiophene(cas: 3141-27-3Synthetic Route of C4H2Br2S)
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) .Synthetic Route of C4H2Br2S
Referemce:
Bromide – Wikipedia,
bromide – Wiktionary