An Organic-inorganic Hybrid Two-dimensional Bilayer Assembled from 1∶2-Type Er(α-PW11O39)211-Moieties and Cu(dap)22+ Linkers

摘要

A new organic-inorganic hybrid phosphotungstate-based Cu~Ⅱ-Er~Ⅲ heterometallic derivative[Cu(dap)_2(H_2O)][Cu(dap)_2]_(4.5)[Er(α-PW_(11)O_(39))_2]·4H_2O(1,dap = 1,2-diaminopropane) has been hydrothermally prepared and characterized by elemental analysis,IR spectra and X-ray single-crystal diffraction.1 belongs to the triclinic space group P1 with a = 13.453(3),b =20.137(4),c = 24.565(4) A,α = 103.468(4),β = 103.829(4),γ = 98.296(4)°,V= 6148.0(19) A^3,Z =2,μ = 22.212 mm^(-1),GOOF = 1.030,R = 0.0744 and wR = 0.1700.Structural analysis indicates that1 exhibits a special two-dimensional double-layer structure constructed from l:2-type[Er(α-PW_(11)O_(39))_2]^(11-) moieties and[Cu(dap)_2]^(2+) linkers.From the topological viewpoint,1 displays a scare two-dimensional five-connected topology in which the[Er(α-PW_(11)O_(39))_2]^(11-) moieties function as the five-connected nodes.Furthermore,its thermogravimetric behavior has been studied.