普鲁士蓝类配位聚合物KCd[Cr(CN)_6]·H_2O的合成、结构及多孔性能研究

Synthesis, Structure and Porous Properties of Prussian Blue Analogue Coordination Polymer KCd[Cr(CN)_6]·H_2O

以Cd2+和[Cr(CN)6]3-为建筑基元通过自组装合成普鲁士蓝类配位聚合物KCd[Cr(CN)6]·H2O(1·H2O),并用红外光谱、元素分析、单晶X射线衍射、粉末X射线衍射、热重分析和氮气吸附脱附等手段对其进行了表征.配位聚合物1·H2O属于面心立方晶系,空间群Fm-3m,晶胞参数:a=b=c=1.09059mn,α=β=γ=90°.配位聚合物1·H2O是由K+,Cd2+,[Cr(CN)6]3-离子和一个结晶水分子组成的三维多孔结构.热重分析结果表明失水样品1的骨架结构在120～200℃之间保持稳定.氮气吸附脱附研究表明:失水样品1具有683.6m2·g-1的比表面积,氮气最大吸附量为8.83mmol·g-1.

A Prussian blue analogue coordination polymer, KCd[Cr（CN）6]·H2O （1·H2O）, has been synthesized based on Cd2＋and [Cr（CN）6]3-as building blocks, which has been characterized by IR spectrum, elemental analysis, single crystal X-ray diffraction, powder X-ray diffraction, thermogravimetric analysis, and N2 adsorption and desorption measurements. 1·H2O belongs to cubic system with space group Fm-3m, and cell parameters： a=b=c=1.09059 mn, and α=β=γ=90°. The structure of 1·H2O consists of K＋, Cd2＋, [Cr（CN）6]3-and one lattice water molecule, which forms a three-dimensional porous structure. Thermogravimetric analysis indicates that the framework of the dehydrated samples 1 is stable between 120 and 200℃. N2 adsorption and desorption studies suggest that the dehydrated samples 1 possesses surface area of 683.6 m^2·g^-1 and the maximum adsorption of 8.83 mmol·g^-1.