论文部分内容阅读
用溶剂热法,以1,4-环己烷二羧酸为配体合成一个新的配合物[(C8H16CoO7)·2.5(H2O)]n。X-射线单晶衍射分析表明,晶体属单斜晶系,空间群为P21/c,晶胞参数a=0.981 0(2)nm,b=1.674 5(3)nm,c=0.808 20(16)nm,β=93.64(3)°,V=1.324 9(4)nm3,Z=2。在配合物中,中心离子Co(Ⅱ)与6个氧原子形成六配位,其中2个氧原子分别来自2个羧酸,另外4个氧原子来自配位水(Co—O键长范围0.201 7(5)~0.224 1(4)nm,O—Co—O键角范围86.16(17)°~178.94(19)°),中心Co(Ⅱ)与6个配位氧原子形成畸变八面体配位构型,羧酸配体上两边的氧原子分别与Co(Ⅱ)形成单齿配位。金属钴之间通过羧酸桥连形成一维链,链与链之间通过水分子桥连形成二维结构,层与层之间通过氢键连接形成三维超分子结构。
A new complex [(C8H16CoO7) · 2.5 (H2O)] n was synthesized by solvothermal method using 1,4-cyclohexanedicarboxylic acid as ligand. X-ray single crystal diffraction analysis showed that the crystal belongs to the monoclinic system with space group P21 / c. The unit cell parameters a = 0.981 0 (2) nm, b = 1.674 5 (3) nm, c = 0.808 20 ) nm, β = 93.64 (3) °, V = 1.324 9 (4) nm3, Z = 2. In the complex, the central ion Co (Ⅱ) forms hexacoordination with six oxygen atoms, of which two oxygen atoms are derived from two carboxylic acids respectively and the other four oxygen atoms are derived from coordination water (Co-O bond length range 0.201 The center Co (Ⅱ) and the six coordination oxygen atoms form a distorted octahedron with 7 (5) ~ 0.224 1 (4) nm and the O-Co-O bond angle ranges from 86.16 (17) ° to 178.94 (19) ° In configuration, the oxygen atoms on both sides of the carboxylic acid ligand form monodentate coordination with Co (Ⅱ) respectively. The metal cobalt is bridged by carboxylic acid to form a one-dimensional chain, and the two chains are bridged by water molecules to form a two-dimensional structure. The two layers are connected by hydrogen bonds to form a three-dimensional supramolecular structure.