Highly emissive B←N unit containing four-coordinate C,N-Chelated organoboron compound for the detection of fluoride ions was written by Yan, Ni;Wang, Fengyan;Wei, Junji;Song, Jiale;Yan, Luke;Luo, Jishun;Fang, Zhongyuan;Wang, Zhijun;Zhang, Weidong;He, Gang. And the article was included in Dyes and Pigments in 2019.Synthetic Route of C8H4Br2S This article mentions the following:
The highly emissive B←N unit containing four-coordinate C,N-chelated organoboron compound, 2 was synthesized. This air and moisture stable compound can be used as a turn-off type fluorescent fluoride (F–) sensor in THF with good selectivity and reversibility. The DFT calculation and the fluorescence quenching titration results showed that the mechanism of the sensing process was based on a competing reaction: the formation of 2-F with the stronger B-F bond in an open form took the place of 2 with B←N bond in a closed form when F– was introduced, leading to significant absorption changing and fluorescence quenching. In the experiment, the researchers used many compounds, for example, 2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7Synthetic Route of C8H4Br2S).
2,3-Dibromobenzo[b]thiophene (cas: 6287-82-7) belongs to benzothiophene derivatives. Benzothiophene is used as starting material for the synthesis of bioactive molecules. The core structure is a part of various pharmaceutical substances and natural products. It has been used as a raw material for the synthesis of biologically active structures and is found in pharmaceuticals such as leukotriene synthesis inhibitors and antifungals, as well as in many natural products.Synthetic Route of C8H4Br2S
Referemce:
Benzothiophene – Wikipedia,
Benzothiophene | C8H6S – PubChem