Abstract 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.

中文翻译：

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Ir2S3/ZnIn2S4 上的烯烃/炔烃的高效可见光引发的氢硫醇化：Ir2S3 的作用

摘要 炔烃/烯烃与硫醇的氢硫醇化是一种原子经济的方法，因此是构建 CS 键的有吸引力的方法。在这里，通过一锅溶剂热法从 ZnCl2、InCl3 和硫代乙酰胺与 IrCl3 中获得具有不同 Ir2S3 负载量的 Ir2S3/ZnIn2S4 纳米复合材料。在 ZnIn2S4 表面负载 Ir2S3 促进了烯烃和炔烃的氢硫醇化，在超过 0.5 mol% Ir2S3/ZnIn2S4 纳米复合材料时观察到最佳性能。基于对负载 ZnIn2S4 的其他几种助催化剂（MoS2、NiS 和 Pd）性能的研究和 EIS 分析，提出优于 Ir2S3/ZnIn2S4 纳米复合材料的性能可归因于硫基光生成效率的提高。通过负载 Ir2S3 及其对光催化析氢的惰性，ZnIn2S4 上的光引发的氢硫醇化反应的副反应。该研究不仅展示了一种基于半导体光催化在可见光下合成硫醇化产物的高效绿色策略，而且为光诱导有机合成的光催化体系的设计和开发提供了一些指导。