Shining light for organophotocatalysed site-selective sulfonylation of anilides.

The site-selective sulfonylation of C(sp)-H bonds of anilide and quinoline amide derivatives has been developed using organophotocatalysis. This mild and sustainable protocol, which operates at room temperature, precludes the requirement for any metal-based catalyst or photocatalyst and oxidant, which are the challenges associated with existing methodologies. Furthermore, the generation of aryl sulfonyl radicals from commercially available aryl sulfonyl chlorides has been achieved through the use of Rose Bengal as an organophotocatalyst, an approach that was previously unexplored.

Roles of Vanadium and Nitrogen in Photocatalytic Activity of VN-Codoped TiO Photocatalyst.

In the present manuscript, we explore the VN-codoped TiO system intended to understand the role played by each dopant in synergistic enhancement in performance of TiO photocatalyst. The photocatalytic decomposition of organic pollutants in aqueous solution under visible light was used as a probe reaction to evaluate the performance of VN-codoped TiO samples with different V and N concentrations. An optical measurement of VN-codoped TiO shows considerable improved visible light absorption with increase in V-concentration as compared to increase in N concentration, which was due to the effective narrowing of the band gap by V-doping.