一例钙金属-有机骨架的合成及其结构与性质分析OACSTPCD

A calcium metal-organic framework[Ca2(CH3COO)3(HCOO)]was obtained by solvothermal syn-thesis method,in which the formic acid ligand was generated by in-situ decomposition of the solvent N,N-dimethylformamide.The crystal structure and properties of[Ca2(CH3COO)3(HCOO)]were analyzed and characterized using X-ray single-crystal diffraction,Fourier transform infrared spectroscopy,thermogravimetric analysis and fluorescence spectrophotometry.The results show that the compound belongs to the triclinic crys-tal system with p1 space group,the unit cell parameters are a=0.671 86(6)nm,b=0.975 79(7)nm,c=0.984 60(9)nm,V=0.563 05(9)nm3,and Z=1.Ca(Ⅱ)ions(octacoordinate)form one-dimensional chains by sharing carboxyl oxygen on acetic acid,and the two sides of the chain are sandwiched by carboxyl oxygen coordinating with Ca(Ⅱ)ions(heptacoordinate)to form sandwich layers.Each sandwich layer repeatedly co-ordinates with acetic acid ligands to form two-dimensional layers,and the two carboxyl oxygen groups of for-mic acid ligands are connected to Ca(Ⅱ)ions in the two coordination modes of the layers to form a three-di-mensional organic skeleton.This compound has good stability and green light can be observed under ultraviolet light.