Synthesis, structures and catalytic properties of two organic-inorganic hybrid polyoxometalates built from {Ni6PW9} units

Two new Ni6-added organic-inorganic hybrid polyoxometalates, {[Ni(en)2][Ni6(μ3-OH)3(H2O)3(Hen)(en)3(3,5-DDB)(B-α-PW9O34)][Ni6(μ3-OH)3(H2O)2(en)3(Ac)(3,5-DDB)(B-α-PW9O34)]}·8H2O (1, en = ethylenediamine, 3,5-DDB = 3,5-Dihydroxybenzoic acid) and [Ni(en)2][Ni6(μ3-OH)3(H2O)4(en)2(5-HIP)(B-α-PW9O34)]·3H2O (2, 5-HIP = 5-Hydroxyisophthalic acid) were synthesized by lacunary directing synthetic strategy. 1...