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本文报道了配合物[Cu2(EBTC)(H2O)2]·8H2O·DMF.DMSO(1,EBTC=1,1′-二苯乙炔-3,3′,5,5′-四羧酸根;DMF=N,N-二甲基甲酰胺;DMSO=二甲基亚砜)的合成、晶体结构和吸附性质。1拥有内径为0.85 nm和0.85 nm×2.15 nm的两种孔洞,分别被6个和12个四羧酸根桥联的[Cu2(CO2)4]螺旋桨式结构围绕,并被EBTC连接成三维超分子结构,该结构拥有可容纳溶剂分子的一维孔道。1为(3,4)-连接的fof(sqc1575)拓扑结构,具有非常大的孔体积,其值高达单位晶胞体积的72.8%。去除溶剂分子后的1a表现出永久孔性,其Langmuir表面积为2844 m2·g-1,BET表面积为1 852 m2·g-1。它对H2、CO2、CH4和C2H2具有可观的气体吸附量和相对较高的吸附焓。特别是,在迄今所有已报道的孔性金属-有机材料中,1a在273 K、1.0×105Pa下,表现出最高的乙炔吸附量(252 cm3·g-1)和很高的吸附焓(吸附量为1 mmol·g-1时的吸附焓为34.5 kJ·mol-1)。
In this paper, the complex [Cu2 (EBTC) (H2O) 2] · 8H2O · DMF.DMSO (1, EBTC = 1,1’-diphenylacetylene-3,3 ’, 5,5’-tetracarboxylate = N, N-dimethylformamide; DMSO = dimethylsulfoxide), crystal structure and adsorption properties. 1 has two kinds of holes with inner diameter of 0.85 nm and 0.85 nm × 2.15 nm and is surrounded by [Cu2 (CO2) 4] 6 and 12 tetracarboxylate-linked propeller structures respectively and is connected by EBTC into three-dimensional supramolecular Structure, which has a one-dimensional pore that holds the solvent molecules. 1 is the fof (sqc1575) topology of (3,4) -linked, with a very large pore volume up to 72.8% of the unit cell volume. After removal of the solvent molecules la showed a permanent porosity, the Langmuir surface area of 2844 m2 · g-1, BET surface area of 1 852 m2 · g-1. It has a considerable amount of gas adsorption and a relatively high enthalpy of adsorption for H2, CO2, CH4 and C2H2. In particular, 1a has reported the highest acetylene adsorption (252 cm3 · g-1) and the highest adsorption enthalpy (adsorption at 273 K, 1.0 × 10 5 Pa) in all reported porous metal-organic materials The enthalpy of adsorption was 34.5 kJ · mol-1 when the amount was 1 mmol · g-1.