Chinese Journal of Catalysis ›› 2021, Vol. 42 ›› Issue (3): 409-416.DOI: 10.1016/S1872-2067(20)63660-9

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Efficient visible light initiated hydrothiolations of alkenes/alkynes over Ir2S3/ZnIn2S4: Role of Ir2S3

Xinglin Wang, Yuanyuan Li, Zhaohui Li*()   

  1. Research Institute of Photocatalysis,State Key Laboratory of Photocatalysis on Energy and Environment, College of Chemistry,Fuzhou University, Fuzhou 350116,Fujian,China
  • Received:2020-05-19 Accepted:2020-06-25 Online:2021-03-18 Published:2021-01-23
  • Contact: Zhaohui Li
  • About author:*Tel/Fax: +86-591-22865855;E-mail:haohuili1969@yahoo.com
  • Supported by:
    National Natural Science Foundation of China (21872031,) and the Award Program for Minjiang Scholar Professorship.(21872031);National Natural Science Foundation of China (21872031,U1705251) and the Award Program for Minjiang Scholar Professorship.(U1705251);Award Program for Minjiang Scholar Professorship

Abstract:

Research Institute of Photocatalysis,State Key Laboratory of Photocatalysis on Energy and Environment,College of Chemistry,Fuzhou University,Fuzhou 350116,Fujian,ChinaArticle history:The hydrothiolations of alkynes/alkenes with thiols is an atom-economic and thus attractive method for the constructions of C-S bonds. Here Ir2S3/ZnIn2S4 nanocomposites with varied Ir2S3 loadings were obtained by one-pot solvothermal method from ZnCl2,InCl3 and thioacetamide with IrCl3. The loading of Ir2S3 on the surface of ZnIn2S4 promoted the hydrothiolations of alkenes and alkynes,with an optimum performance observed over 0.5 mol% Ir2S3/ZnIn2S4 nanocomposite. Based on the studies on the performance of several other cocatalysts (MoS2,NiS and Pd) loaded ZnIn2S4 and the EIS analyses,it was proposed that the superior performance over Ir2S3/ZnIn2S4 nanocomposite can be ascribed to an improved efficiency on the photogeneration of the thiyl radicals by loading Ir2S3 as well as its inactivity for photocatalytic hydrogen evolution,a side reaction in the light initiated hydrothiolation reaction over ZnIn2S4. This study not only demonstrates an efficient and green strategy to synthesize thiolated products under visible light based on semiconductor photocatalysis,but also provides some guidances for the design and development of photocatalytic systems for light induced organic syntheses.

Key words: Photocatalysis, Ir2S3/ZnIn2S4, Alkenes, Alkynes, Hydrothiolation