Singha Krishnadipti, Mondal Aniruddha, Ghosh Subhash Chandra, Panda Asit Baran
Central Salt and Marine Chemicals Research Institute (CSIR-CSMCRI) and CSMCRI-Academy of Scientific and Innovative Research (AcSIR), G. B. Marg, Bhavnagar, 364002, Gujarat, India.
Chem Asian J. 2018 Feb 2;13(3):255-260. doi: 10.1002/asia.201701614. Epub 2018 Jan 10.
CdS sheet-rGO nanocomposite as a heterogeneous photocatalyst enables visible-light-induced photocatalytic reduction of aromatic, heteroaromatic, aliphatic and sulfonyl azides to the corresponding amines using hydrazine hydrate as a reductant. The reaction shows excellent conversion and chemoselectivity towards the formation of the amine without self-photoactivated azo compounds. In the adopted strategy, CdS not only accelerates the formation of nitrene through photoactivation of azide but also enhances the decomposition of azide to a certain extent, which entirely suppressed formation of the azo compound. The developed CdS sheet-rGO nanocomposite catalyst is very active, providing excellent results under irradiation with a 40 W simple household CFL lamp.
硫化镉片状-还原氧化石墨烯纳米复合材料作为一种多相光催化剂，能够在以水合肼作为还原剂的情况下，实现可见光诱导的光催化还原反应，将芳香族、杂芳香族、脂肪族和磺酰叠氮化物转化为相应的胺。该反应在形成胺的过程中表现出优异的转化率和化学选择性，且不会生成自光活化的偶氮化合物。在所采用的策略中，硫化镉不仅通过叠氮化物的光活化加速氮烯的形成，还在一定程度上增强了叠氮化物的分解，从而完全抑制了偶氮化合物的形成。所开发的硫化镉片状-还原氧化石墨烯纳米复合催化剂活性很高，在40瓦普通家用紧凑型荧光灯照射下能提供优异的结果。
