以草酸及咪唑基配体构筑的二维网状锌(Ⅱ)配位聚合物的合成、晶体结构及荧光性质

摘要

通过水热法合成了一个新的配位聚合物[Zn(C2O4)(1,3-bix)]n(1,H2C2O4=草酸,1,3-bix=1,3-双(咪唑基-1-甲基)-苯).并对其进行了元素分析、红外光谱、热重和X-射线单晶衍射测定.该配合物属于三斜晶系,P(1)空间群.在晶体结构中,锌原子为六配位与来自2个不同的C2O42-配体上的4个羧基氧原子和来自2个不同的1,3-bix配体上的2个氮原子配位,呈现畸变的八面体几何构型.而且该配合物通过氢键和π-π堆积作用扩展成三维超分子网状结构.此外还研究了它的荧光性质.%A new coordination polymer [Zn (C2O4) (1,3-bix)]n (1,H2C2O4=oxalic acid,1,3-bix =1,3-bis (imidazol-1-ylmethyl)-benzene) has been hydrothermally synthesized and structurally characterized by elemental analysis,IR spectrum,TG and single-crystal X-ray diffraction.The complex crystallizes in triclinic,space group P(1) with α=0.885 8(2) nm,b=0.956 8(2) nm,c=1.019 6(3) nm,α=67.476(3)°,β=66.281(3)°,γ=77.280(3)°,V=0.780 0(3) nm3,C16H14N4O4Zn,Mr=391.68,Dc=1.668 g·cm-3,μ(Mo Kα)=1.605 mm-1,F(000)=400,Z=2,the final R=0.025 5 and wR=0.060 9 for 2 760 observed reflections (I＞2σ(I)).In the crystal structure,the zinc atom is six-coordinated with four carboxylate oxygen atoms from two different C2O42-ligands and two nitrogen atoms from two different 1,3-bix ligands,showing a distorted octahedral geometry.Furthermore,it exhibits 3D supramolecular network structure through hydrogen bonding and π-π stacking interactions.Moreover,its luminescent property has been investigated in the solid state.CCDC:908764.