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:{IZn(4-bpdb)(pnba)2]·4H2O}n(1),[Cd(4-bpdb)(pnba)2]n(2),{[cdz(3-bpdb)z(OAc)4]·5H2O)。(3),和{[Co(3-bpdb)(pnba):(H2O)2]·2HzO}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(Ⅱ)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(Ⅱ)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(Ⅱ)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 mixed-ligand coordination polymers, {[Zn(4-bpdb)(pnba)2] ·4H2O}, (1), [Cd(4-bpdb)(pnba)2], (2), {[Cd2 (3-bpdb)2 (OAc)4]- 5H2O}, (3), and {[Co (3-bpdb) (pnba)2 (H2O)2]· 2U2O}, (4), (4-bpdb =1,4-bis (4-pyridyl)-2,3- diaza-l,3-butadiene, 3-bpdb=l,4-bis(3-pyridyl)-2,3-diaza-1,3-butadiene, Hpnba=p-nitrobenzoic acid, HOAc= Acetic acid) were synthesized and characterized. Single crystal X-ray analysis revealed that complex 1 featured a 1D zigzag chain structure and the Zn(ll) ions adopted slightly distorted tetrahedral coordination geometry. While polymers 2 and 3 possessed 1D ladder-like double chain structures with Cd(Ⅱ) ions in pentagonal bipyramidal coordination geometry. Polymer 4 displayed a 1D linear chain structure where Co(1) ions had octahedral geometry. Moreover, the elemental analysis, infrared spectroscopy, thermal analysis, PXRD, and photoluminescence properties of the complexes were also investigated.