Carboxylate Ligand-supported Agn (n=21 and 24) Alkynyl Clusters Induced by Single/Double Carbonate Ions

Structural transformation is important for the study of silver cluster compounds, in which controlled synthesis of their shapes and sizes via anion template-driven is one key scientific question. In this work, the CO32- anion templates were captured by the [(BuC)-Bu-t equivalent to CAg](n) system under the stimulation induced by carboxylate ligand CF3COO-/PhCOO-, and two silver alkynyl clusters [(CO32-)@Ag-21((BuC)-Bu-t equivalent to C)(16)(CF3COO)(3)(H2O)]center dot DMF center dot 2CH(2)Cl(2) (1) and [(CO32-)(2)@Ag-24((BuC)-Bu-t equivalent to C)(16)(PhCOO)(4)]center dot CH3OH center dot 4DMF (2) have been successfully isolated and charactered. With the increase of the number of CO32- templates from single to double, the outer silver atoms from twenty-one to twenty-four, accompanied by the growth of the cluster skeleton from 9.8 angstrom x6.9 angstrom of the (CO32-)@Ag-21 unit to 10.5 angstrom x7.3 angstrom of the (CO32-)(2)@Ag-24 unit. In addition, the syntheses, structures, photocurrent responses, cyclic voltammetry characteristics, luminescence, and photodegradation of compounds 1 and 2 have been studied.

Automated summary

In this study, two silver cluster compounds were successfully synthesized and their structures were characterized. The controlled synthesis of these compounds through anion template-driven transformation is important for understanding silver cluster compounds. The increase in the number of CO32- templates led to changes in the shape and size of the silver clusters.