2-D and 3-D phosphotungstate-based TM-Ln heterometallic derivatives constructed from dimeric[Ln(α-PW _(11)O _(39))_2]_(11-)fragments and copper-organic complex linkers

摘要

Three organic-inorganic hybrid TM-Ln heterometallic phosphotungstates[Cu(dap)_2(H _2O)][Cu(dap)_2]_(3.5)[La(α-HPW _(11)O _(39))_2]·6H _2O(1)[Cu(dap)_2(H _2O)]_(0.5)[Cu(dap)_2]_4[Nd(α-HPW _(11)O _(39))_2]·4H _2O(2)and[Cu(dap)_2(H _2O)]_2[Cu(dap)_2]_(3.5)[Eu(α-PW _(11)O _(39))_2]·6H _2O(3)(dap=1, 2-diaminopropane)have been hydrothermally synthesized and structurally characterized by elemental analyses, IR spectra, optical diffuse reflectance spectra, powder X-ray diffraction(PXRD), thermogravimetric(TG)analyses and single-crystal X-ray diffraction. Their common features are that 1-3 all consist of asymmetric sandwich-type subunits[Ln(α-PW _(11)O _(39))_2]~(11-)and[Cu(dap)_2]~2 bridges. Both 1 and 2 display the 2-D(4, 4)-topological sheets whereas 3 exhibits the 3-D 5-connected(4 ~6·6 ~4)topological framework. The magnetic properties of 2 and 3 and the luminescence performance of 3 have been measured.