论文部分内容阅读
以α-Keggin型硅钨酸、碳酸铜和2-乙基-3-甲基吡嗪(pyz)为原料,通过水热方法合成了标题化合物。采用元素分析、红外光谱和单晶X-射线衍射法表征了该化合物的结构。晶体结构分析表明,该化合物属于正交晶系,Pna21空间群,晶胞参数a=2.238 38(4)nm,b=1.386 87(3)nm,c=2.151 07(3)nm,α=β=γ=90°,V=6.677 7(2)nm3,Z=4,F(000)=6 408,Dc=3.598 g/cm3。该化合物中一价铜离子首先被pyz配体连接成波浪型的一维链状结构,而(SiW12O40)4-阴离子作为三齿配体进一步连接这些链形成一个三维的框架结构。
The title compound was synthesized by hydrothermal method using α-Keggin type silicotungstic acid, copper carbonate and 2-ethyl-3-methylpyrazine (pyz) as starting materials. The structure of this compound was characterized by elemental analysis, infrared spectroscopy and single crystal X-ray diffraction. The crystal structure analysis showed that the compound belongs to the orthorhombic space group Pna21 with the unit cell parameters of a = 2.238 38 (4) nm, b = 1.386 87 (3) nm and c = 2.151 07 = γ = 90 °, V = 6.677 7 (2) nm3, Z = 4, F (000) = 6 408, Dc = 3.598 g / cm3. The monovalent copper ions in this compound are first connected by pyz ligands into a wave-like one-dimensional chain structure, and the (SiW12O40) 4-anions further serve as tridentate ligands to link these chains to form a three-dimensional framework structure.