ARS–TiO ₂ photocatalyzed direct functionalization of sp2 C–H bonds toward thiocyanation and cyclization reactions under visible light

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An ARS–TiO ₂ photocatalyst has been prepared, by a simple method through stirring a mixture of ARS and TiO ₂ at room temperature in the dark, to extend the photocatalytic response of titanium dioxide toward the visible light spectrum.