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本文采用凝胶法成功地合成了粘液酸镧(La_2(C_6H_8O_8)_3·6.5H_2O)晶体。样品经过热分析,元素分析,红外光谱测定及x射线衍射研究,确定了分子和晶体结构。晶胞参数:a=b=10.254(3)A,c=8.894(2)A,V=809.97A~3,Z=1,空间群为P 3、分子结构对称性为C_3,其三重轴沿C轴方向。每个配体中有六个氧原子参与配位,其中四个为羧基氧,另外两个为a-羟基氧。La原子的配位数为9,与其配位的9个氧原子分处于三个垂直于C方向的正三角形的顶点上。从总体来看,该化合物的晶体呈三维无限延续的网状结构,而La_2L_3做为一个重复单元。
In this paper, La 2 (C_6H_8O_8) _3 · 6.5H_2O) crystals were successfully synthesized by gel method. Samples after thermal analysis, elemental analysis, infrared spectroscopy and x-ray diffraction studies to determine the molecular and crystal structure. The unit cell parameters are: a = b = 10.254 (3) A, c = 8.894 (2) A, V = 809.97A ~ 3, Z = 1, space group P 3 and molecular structure symmetry C_3. C axis direction. There are six oxygen atoms in each ligand involved in coordination, of which four carboxylate oxygen, the other two a-hydroxy oxygen. The coordination number of La atom is 9, and the 9 oxygen atoms coordinated with it are located on the vertices of three regular triangles perpendicular to C direction. Overall, the crystal of the compound showed a three-dimensional network with an infinite continuation, while La_2L_3 was regarded as a repeating unit.