Recyclable Copper Indium Sulfide Quantum Dots for Photocatalytic Homocoupling of Arenediazonium Tetrafluoroborates
Qian-Hui Liu, M. Zhang, M. Zhang, Yi-Yao Han, Mo Zhang, Mo Zhang, Zhan‐Hui Zhang
Abstract
Copper indium sulfide quantum dots (QDs) were prepared by a solvothermal method and characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, and energy-dispersive X-ray techniques. The as-prepared CuInS 2 QDs display excellent photocatalytic activity in the visible-light-driven homocoupling of arenediazonium tetrafluoroborates at room temperature. Various symmetrical biaryls were obtained in γ-valerolactone (GVL) in good to excellent yields under mild reaction conditions. In addition, the photocatalyst, CuInS 2 QDs, is stable in the catalytic process and can be recycled at least five times without significant losing of its catalytic efficiency.