论文部分内容阅读
通过水热合成法,合成了4例由混合配体构筑的的过渡金属配位聚合物:{[Zn(4-bpdb)(pnba)2]·4H2O}n(1),[Cd(4-bpdb)(pnba)2]n(2),{[Cd2(3-bpdb)2(OAc)4]·5H2O}n(3),和{[Co(3-bpdb)(pnba)2(H2O)2]·2H2O}n(4)(4-bpdb=1,4-双(4-吡啶基)-2,3-二氮杂-1,3-丁二烯,3-bpdb=1,4-双(3-吡啶基)-2,3-二氮杂-1,3-丁二烯,Hpnba=对硝基苯甲酸,HOAc=乙酸),并且分别用X-射线单晶衍射、元素分析、红外光谱、热差分析、X-射线粉末衍射表征了这4个配合物。晶体结构分析表明,配合物1显示出一维锯齿形链状结构,金属锌髤离子具有稍微变形的四面体配位几何构型。而配合物2和3却展现出一维梯状双链结构,镉髤离子展现出五角双锥几何构型。而配合物4却拥有一维直线型链状结构,其中钴髤离子拥有八面体几何形状。上述结果说明,金属离子的几何构型可能对配合物的结构具有重要的影响。此外,还研究了配合物1~3的荧光性质。
Four kinds of transition metal coordination polymers were synthesized by hydrothermal method, including {[Zn (4-bpdb) (pnba) 2] · 4H2O} n bpdb pnba 2 n 2 and {[Cd2 (3-bpdb) 2 (OAc) 4] · 5H2O} n (3) and {[Co (3-bpdb) (pnba) 2 (4-bpdb = 1,4-bis (4-pyridyl) -2,3-diaza-1,3-butadiene, 3-bpdb = 1,3-butadiene, Hpnba = p-nitrobenzoic acid, HOAc = acetic acid) and characterized by X-ray single crystal diffraction, elemental analysis, The four complexes were characterized by FTIR, thermal analysis and X-ray powder diffraction. The crystal structure analysis showed that the complex 1 showed a one-dimensional zigzag chain structure, and the zinc zinc metal ions had slightly deformed tetrahedral coordination geometry. While complexes 2 and 3 show a one-dimensional ladder-like double-stranded structure, and cadmium ions exhibit a pentagonal bipyramid geometry. The complex 4 has a one-dimensional linear chain structure, which has octahedral cobalt 髤 ion geometry. The above results indicate that the geometry of the metal ions may have a significant impact on the structure of the complex. In addition, the fluorescence properties of complexes 1 ~ 3 were also studied.