A novel hybrid compound [CuCl(H2O)(4))][CuCl(H2O)(Phen)][{(CuPhen)(2)Cl-2}(2)(bdc)](2)[P2W18O62]center dot 5H(2)O (1) (Phen=1,10-phenanthroline and bdc=1,4-benzenedicarboxylate), containing multinuclear Cu-II complex cations, has been obtained in hydrothermal conditions and characterized by IR, elemental, thermogravimetric, electrochemical and single-crystal X-ray diffraction analysis. The main structural feature to this compound is the copper-Phen complex moieties which compose new tetranuclear copper-Phen complex cation [{(CuPhen)(2)Cl-2}(2)(bdc)](2+) bridged by Cl and bdc ligands. Furthermore, a compound 1-modiffied carbon paste electrode (1-CPE) displays the good electrocatalytic activity toward the reduction of nitrite. CCDC: 952036
