Polyoxometalate-mediated syntheses of three structurally new silver clusters

Abstract

Three structurally new polyoxometalate-templated silver clusters, homometallic [(SiW₉O₃₄)@Ag₂₄(ⁱPrS)₁₁(DPPP)₆Cl]₂(SiW₁₂O₄₀) (Ag₂₄), heterometallic [(SiW₉O₃₄)@Ag₂₂Cu(ⁱPrS)₁₁(DPPP)₆Cl](SbF₆)₂ (Ag₂₂Cu) and {Ag₁₆(ⁱPrS)₆(DPPP)₈(CH₃COO)₄[Co₄(OH)₃(H₂O)SiW₉O₃₃]₂}·(CH₃CN)₄ (Ag₁₆Co₈) (ⁱPrS⁻ = isopropanethiolate, DPPP = 1,3-bis(diphenylphosphino)propane, SbF₆⁻ = hexafluoroantimonate) have been successfully synthesized using a facile solvothermal approach. The introduction of copper and cobalt ions can induce obvious changes in the molecular configuration of the obtained clusters, leading to distinct temperature-dependent photoluminescence and photothermal conversion properties.