新型苯并咪唑类配体配合物的合成及其性能

以苯并咪唑（HL¹）和3,6 二氯哒嗪在钠催化下反应制得配体3-氯-6-(苯并咪唑-1-基)哒嗪(L²）；采用溶液法和水热法，L¹分别与含有银、铜过渡金属盐反应合成了3种新的有机金属苯并咪唑配合物［AgL¹］_n(1)，［Cu₄(HL¹)₄(O)(Cl)₆］(2)和{［Cu(HL¹)₂］·SiF₆}(3)；采用溶液法，L²与Zn(NO₃)₂·6H₂O经配位反应合成了配合物{［Zn(L²)₃(NO₃)］NO₃}(4)，其结构经IR，元素分析和X-射线单晶衍射表征。结果表明：1通过苯并咪唑桥连形成一维链状结构，2由苯并咪唑和氯离子桥接形成四核结构，3和4均显示一个单核结构，3的金属中心原子采用二配位构型，4的金属中心原子采用四配位构型。此外，研究了配体HL¹与1,及配体L²与4的荧光性能。结果表明：与HL¹相比，1的最大发射波长发生了红移；而4相对于配体L²其最大发射峰发生明显蓝移。

Synthesis and Properties of Novel Complexes Based on Benzimidazole Ligands

3-Choloro-6-(benzoimidazol-1-yl)pyridazine(L2) was synthesized by reaction of benzimidazole(HL1) with 3,6-dichloropyridazine catalyzed by Na.Three new complexes, AgL1]n(1), Cu4(HL1)4(O)(Cl)6](2) and {Cu(HL1)2]·SiF6}(3) were synthesized by reaction of HL1 with silver and copper salts via solution method and the hydrothermal method.One new complex, {Zn(L2)3(NO3)]·NO3}(4), was synthesized by reaction of L2 with Zn(NO3)2·6H2O.The structures were characterized by IR, elemental analysis and X-ray single crystal diffraction analysis.The results showed that 1 shows a one-dimensional chain structure bridged by benzimidazole, 2 displays a four-nuclear structure bridged by benzimidazole and Cl-anions, 3 and 4 feature a mononuclear structure, 3 shows a four-coordinated geometry, 4 shows a two-coordinated geometry.Moreover, photoluminescence properties of ligands HL1, L2 and complexes 1 and 4 were investigated.The maximum emission wavelength of 1 showed a red shift compared with that of the ligand HL1, however, the maximum emission peak of 4 showed a blue shift compared with that of the ligand L2.