J. Am. Chem. Soc. 2016, 138, 13127−13130

Bowen Wang,†,‡,§ Javier Durantini,†,§ Jun Nie,*,‡ Anabel E. Lanterna,*,† and Juan C. Scaiano*,†

Copper-doped semiconductors are designed to photoassist the alkyne−azide cycloaddition catalysis by Cu(I). Upon irradiation, injection of electrons from the semiconductor into copper oxide nanostructures produces the catalytic Cu(I) species. The new catalysts are air- and moisture-tolerant and can be.