3 years ago

Temperature-Mediated Template Release: Facile Growth of Copper(I) Mixed Ethynediide/iso-Propylethynide Nanoclusters

Thomas Chung Wai Mak, Leon Li-Min Zhang
Abstract: In the comproportionation reaction of CuIIX2 and Cu0 with iso-propylacetylene (iPr−C≡C−H), the ethynediide species C22− is generated via concomitant C−H/C−C bond cleavage of the iPr−C≡C−H precursor under moderate temperature to direct the formation of CuI mixed ethynediide/iso-propylethynide nanoclusters. Herein the active ethynediide dianion C22− is observed to exhibit chameleon-like templating behavior to form C2@Cum (m = 6 (3, 4), 7 (2, 4), 8 (1)) central structural units for successive formation of {C22−⊂Cu24} (1, 2), {6C22−⊂Cu48} (3) and {18C22−⊂Cu92} (4) complexes. Bearing the largest C22− template number, complex 4 features an unprecedented nanoscale Cu2C2 kernel. Furthermore, 1−3 exhibit structure-controlled photoluminescence in the solid state.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/anie.201708760

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