Two unprecedented inorganic–organic boxlike and chainlike hybrids based on arsenic–vanadium clusters linked by nickel complexes

Two novel organic–inorganic hybrid arsenic-vanadates, [{Ni(en)2}4(4,4′-bipy)4{Ni(H2O)2}]2[As8V14O42(NO3)]4·16H2O 1 and [Ni(en)2(H2O)2]2[{Ni(en)2(H2O)}2As8V14O42(NO3)][{Ni(en)2}As8V14O42(NO3)]·6H2O 2 are reported in this study. Crystal data for compound 1: Tetragonal, I4/m, a=27.507(4) Å, b=27.507(4) Å, c=22.101(4) Å; V=16722(5) Å3, Z=2, R(final)=0.0508. Crystal data for compound 2: Triclinic, P–1, a=11.530(2) Å, b=14.883(3) Å, c=21.330(4) Å, α=76.94(3)°, β=76.58(3)°, γ=69.54(3)°, V=3293.4(1) Å3, Z=1, R(final)=0.0559. The boxlike structure of compound 1 is designed from [{Ni(en)2}4(4,4′-bipy)4{Ni(H2O)2}] sheets pillared by [α-As8V14O42] clusters, which represents the first mixed-organic ligand-decorated tetrameric As–V–O cluster. Compound 2 is constructed from the rarely [β-As8V14O42] clusters and Ni coordination complex fragments. The electrochemical property and magnetic property of compound 1 have been studied.