A Polyoxochromate Templated 56-Nuclei Silver Nanocluster.

Most of polyoxometallates (POMs) templated silver nanoclusters recorded so far are polyoxomolybdates and polyoxotungstates; however, as congeneric polyoxochromates, they are rarely observed in silver nanoclusters. Herein, a high-nuclearity polyoxochromate, (CrCrO), is uncovered in a novel silver nanocluster () as an anion template. The mixed-valent (CrCrO) consists of four edge-sharing CrO octahedra and eight CrO tetrahedra, which are fused together by sharing one or two vertexes.