知识与财富的链接
A new hybrid material, (H2dien)2(Hamimi)2[Co3Mo12O24(OH)6(HPO4)6(PO4)2]2 · nH2O (1) (n = 5.26), was hydrothermally synthesized via a simultaneous in situ cyclization of acetic acid and diethylenetriamine to 1-(2-aminoethyl)-2-methyl-2-imidazoline. The sandwich-shaped [Co(Mo6P4)2] clusters in 1 are linked by tetrahedrally coordinated cobalt into two-dimensional layers. It is interesting that no 2-imidazoline group was observed when the starting Co(II) salt was replaced by Ni(II) salt under the same hydrothermal conditions, but it led to the isolation of (Hdien)2[NiMo12O24(OH)6(H2PO4)6(HPO4)2] · 2dien · 8H2O (2), in which the [Ni(Mo6P4)2] units are discrete. A probe reaction of the oxidation of acetaldehyde with H2O2 showed that both compounds have high catalytic activity in the reaction. Compound 1 crystallizes in the space group C2/c with a = 26.028(4), b = 12.3391(17), c = 25.555(4) Å, β = 98.876(12)°, V = 8109(2) Å3 and Z = 4. Compound 2 is in the space group P21/n with a = 13.206(3), b = 22.170(5), c = 13.627(3) Å, β = 103.437(5)°, V = 3880.7(15) Å3 and Z = 2.