Abstract
The design and assembly of efficient water oxidation catalysts (WOCs) is quite desirable, but still remains a synthetic challenge. Herein, we researched remarkable calix[4]resorcinarene-based [Co12] coordination cages with bio-inspired [Co4O4] cubanes. Markedly, the coordination cage features efficient visible light-driven water oxidation activity, and represents a unique example of calix[4]resorcinarene-based [Co4O4] cubane WOC. It afforded an optimal turnover number (TON) of 119, corresponding to a quite high turnover frequency (TOF) of 793 h−1 and an oxygen yield of 17.0%. A possible mechanism for the water oxidation reaction was also proposed by means of density functional theory (DFT) calculations.
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