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A Visible-Light-Harvesting Covalent Organic Framework Bearing Single Nickel Sites as a Highly Efficient Sulfur-Carbon Cross-Coupling Dual Catalyst.

Covalent-Organic-Frameworks (COFs) have recently emerged as light-harvesting devices, as well as elegant heterogeneous catalysts. The combination of these two properties into a dual catalyst has not been explored yet. Here, we report a new photosensitive triazine-based COF, decorated with single Ni-sites to form a dual catalyst. This crystalline and highly porous catalyst shows excellent catalytic performance in the visible-light-driven catalytic sulfur-carbon cross-coupling reaction. The ability to incorporate single transition metal sites in a photosensitive COF scaffold which acts as a two-component synergistic catalyst in organic transformation is demonstrated for the first time.