Hydrothermal syntheses and characterizations of two new hydrogen bond-supported supramolecular compounds based on polyoxometalates

摘要

Two new polyoxometalates [HN(C_2H_5)_3]_3[PMo_(12)O_(40)] (1) and [NH_2(C_2H_4NH_3)_2]_2[Mo_5P_2O_(23)] (2) have been hydrothermally synthesized and characterized by IR, UV-Vis, XPS spectra, TG analyses, and single crystal X-ray diffraction. Crystal data for 1: monoclinic, space group C2/c, a = 24.651(5)A, B=10.822(2)A, c = 22.413(5)A, beta = 120.37(3) deg, and V = 5158.7(18)A~3; for 2: triclinic, space group P-1, a = 9.821(2)A, b = 9.948(2)A, c= 14.687(3)A, alpha = 95.490(3) deg, beta = 98.870(3) deg, gamma = 95.710(3) deg, and V = 1401.7(5)A~3. The crystal structure analyses reveal complex hydrogen bonds in both 1 and 2 in 3-D supramolecular arrays constructed from different polyoxoanions and organic ligands.