Two large ionic crystals: Both their anions and cations constructed by Anderson-type POM-supported transition metal complex

Two large ionic crystals, [{Cu(C12N2H8)(H2O)3}2{Al(OH)6Mo6O18}][{Cu2(C2O4)(C12N2H8)2} {Al(OH)6Mo6O18}]·10H2O (1) ≡ [1c][1a]·10H2O ≡ 1 and [{Cu(C12N2H8)(H2O)3}2{Cr(OH)6Mo6O18}][{Cu2(C2O4)(C12N2H8)2} {Cr(OH)6Mo6O18}]·12H2O (2) ≡ [2c][2a]·12H2O ≡ 2, whose anions and cations constructed by Anderson–type POM–supported transition metal complex, have been isolated by conventional solution method, and characterized by elemental, IR, thermogravimetric, X-ray powder diffraction, EPR, magnetic and single-crystal X-ray diffraction analyses. Compounds 1 and 2 are isomorphic and consist of one-dimensional anion chains, which are constructed by alternating Anderson-type polyoxoanions and dinuclear copper complexes. 1D anions chains, 1c (2c) cations and lattice waters lead to their three-dimensional structures through hydrogen bonds and π–π interactions. The EPR studies and magnetic studies elucidate the electronic properties of the metal ions (Cu2+ or Cu2+/Cr3+), and the results are in good agreement with the structural feature of these compounds.

Graphical AbstractTwo large ionic crystals, [{Cu(C12N2H8)(H2O)3}2{Al(OH)6Mo6O18}][{Cu2(C2O4)(C12N2H8)2} {Al(OH)6Mo6O18}]·10H2O (1) ≡ [1c][1a]·10H2O ≡ 1 and [{Cu(C12N2H8)(H2O)3}2{Cr(OH)6Mo6O18}][{Cu2(C2O4)(C12N2H8)2} {Cr(OH)6Mo6O18}]·12H2O (2) ≡ [2c][2a]·12H2O ≡ 2, whose anions and cations constructed by Anderson-type POM-supported transition metal complex, have been isolated by conventional solution method, and characterized by elemental, IR, thermogravimetric, X-ray powder diffraction, EPR, magnetic and single-crystal X-ray diffraction analyses.Figure optionsDownload as PowerPoint slideResearch Highlights
► Two large ionic crystals exhibit strong antiferromagnetic coupling.
► Anions and cations are constructed by Anderson-type POM-supported transition metal complex.
► Anderson-type polyoxoanions supported oxalate-bridged dinuclear copper complex act as anions.