Two new organic-inorganic hybrid mono-transition-metal-substituted polyoxometalates [Ni（2,2′-bipy）3]3[Ni（H2O）SiW11O39]·11H2O 1 and [Cu（dien）（H2O）][Cu（dien）（H2O）2]2- [CuSiW11O39]·5.5H2O 2 （2,2′-bipy = 2,2′-bipyridine, dien = diethylenetriamine） have been hydrothermally synthesized and characterized by single-crystal X-ray diffraction, elemental analysis, magnetic properties, and IR spectrum. Crystal data for 1： monoclinic, space group P21/n, a = 17.492（3）, b = 33.481（5）, c = 20.493（3）A^°, β = 101.894（3）°, Dc = 2.563 mg/A^°^3, F（000） = 8440, μ = 11.454 mm^-1 and Z = 4; and those for 2：monoclinic, space group P21/n, a = 11.114（3）, b = 22.803（7）, c = 22.468（7） A^°, β = 97.896（6）°, Dc = 4.036 mg/A^°^3, F（000） = 6140, μ = 23.942 mm^-1 and Z = 4. The study on the magnetic susceptibility of 2 demonstrates the presence of ferromagnetic interaction.
Two new alkaline metal borates containing 1D{B5}/{B6}oxoboron helical chains,namely Na0.5[B5O8(OH)2]0.5[B5O6(OH)2]0.5·0.5H3O(1)and NaKCs[B6O9(OH)3](2)were synthesized under solvothermal conditions.Compound 1 contains the interesting alternative left-and right-handed helical{[B5O8(OH)2][B5O6(OH)2]}2-({B5}-1 and{B5}-2)1D chains and compound 2 possesses the similar[B6O11(OH)3]7-({B6})chains.Their 1D chains are further assembled into 2D layers and 3D supramolecular frameworks through O-H…O hydrogen bonds.In addition,the UV cutoff edge of compounds 1 and 2 is both below 190 nm.
