多核Mn~Ⅲ链构筑三维框架结构的合成与结构表征

Synthesis and Structure of 3D Framework Based on Polynuclear Mn~Ⅲ Chains

以三(羟甲基)氨基甲烷(THAM),乙酸锰为主要原料,用常温挥发法合成一种新型金属有机框架材料[NaMn_4~Ⅲ(THAM)_2(OAC)_6(H_2O)_3]_n·nClO_4. X-单晶衍射分析测定其结构为三维网络,结晶于三斜晶系,P-1空间群,晶胞参数为a=0. 899 0(10) nm,b=0. 929 6(12) nm,c=1. 194 5(14)nm,α=98. 835(10)°,β=93. 256(9)°,γ=104. 345(11)°,V=0. 951 0(2) nm^3.乙酸根采用桥联模式将相邻的一维"Z"型Mn—O链连接成二维层,然后Na离子进一步连接相邻的二维层形成三维阳离子骨架,高氯酸根游离于孔道中平衡体系电荷.该化合物可以作为阴离子交换材料.

In this paper,a novel metal organic framework material [NaMn^Ⅲ 4(THAM) 2(OAC) 6(H 2O) 3] n · n ClO 4 was synthesized by volatilization at room temperature using tri(hydroxymethyl) aminomethane(THAM) and manganese acetate as the main raw materials.X-ray single crystal diffraction analysis revealed that it was a three-dimensional structure and crystallized in the triclinic crystalline system, P-1 space group unit.The cell parameters were a =0.899 0(10) nm, b =0.929 6(12) nm, c =1.194 5(14) nm,α=98.835(10)°,β=93.256(9)°,γ=104.345(11)°, V =0.951 0(2)nm 3.In the framework material,the acetate is used to connect the adjacent one-dimensional “Z” type Mn-O chain into a two-dimensional layer by bridging mode.Then the Na ions connect the adjacent two-dimensional layers to form a three-dimensional cationic skeleton.The perchlorate located in the pore can balance the charge of the system.The compound can be used as an anion exchange material.