超分子碱金属膦酸盐——哌嗪双膦酸钠的合成及晶体结构

二维或三维金属膦酸盐聚合物作为功能材料在催化、离子交换和纳米材料等研究领域受到广泛关注 .最初的研究主要集中在四价金属盐 ,后来陆续报道了对于其它价态金属盐的研究 1～ 3] ,但关于单一碱金属的研究报道较少 . 2 0 0 0年 ,Aranda等4 ] 报道了首例 Na2 ( HO3PCH2 ) 3NH ]· 1 .5 H2 O( Na PP- 1 )晶体结构 .与其它膦酸盐的明显差别是 ,碱金属双膦酸盐是治疗骨质疏松症的药物 5] .本文从重要的医药原料哌嗪 6 ]出发 ,制备并测定了一种具有超分子特征的 α-氨基双膦酸钠Na2 ( HO3PCH2 ) NC4 H8N( CH2 PO3H) ]( H2 O)…

Synthesis and Crystal Structure of Supramolecular Alkaline Metal Phosphonate Sodium Piperazinyldiphosphonate

A novel supramolecular sodium N,N-piperazinebis(methylenephosphonate) Na2(HO3PCH2)·NC4H8N(CH2PO3H)](H2O)8·2H2O, self-assembled into infinite1D chains, was synthesized by the reaction of N,N-piperazine bis(methylenephosphonic acid) with NaOH. Its structure was characterized by single crystal X-ray diffraction, ICP and elemental analysis. The compound crystallizes in triclinic system, space group P1 with a=0.659 06(2) nm, b=0.726 73(2) nm, c= 1.158 25(4) nm, α=79.751(2)°, β=75.833(2)°, γ=74.122(2)°, V=0.513 68(3) nm3, Z=2, Dc=1.611 Mg/m3, μ=0.331 mm-1, F(000)=264, S=1.098, R1=0.045 2, wR=0.136 0. In the crystal, edge sharing octahedron Na2O10 dimers and tetrahedron PO3C are assembled to an 1D chain via the bridges of heterocycle. 3D supramolecular framework is self-assembled from 1D chains through H-bonds.