基于1,4-双(2-甲基-1H-咪唑-1-基)苯的2例d^(10)金属配合物的合成、结构和性能研究

Synthesis,structure and properties of two d^(10)metal complexes based on 1,4-bis(2-bethyl-1H-imidazol-1-yl)benzene ligand

以溶剂热法合成了2例基于d^(10)金属离子的配合物[Zn(bmib)(HCOO)_(2)]·3H_(2)O(1)和[Cd(bmib)_(0.5)(tdc)(DMF)(H_(2)O)](2)[bmib=1,4-双(2-甲基-1H-咪唑-1-基)苯,H_(2)tdc=2,5-噻吩二羧酸].2例配合物合成条件除金属盐不同外,其余均相同.结构分析揭示,配合物1中H_(2)tdc并未与金属中心配位,Zn^(2+)采取四配位的模式与2个HCOO-和2个bmib配体连接形成一维“Z”字形链.配合物2中Cd^(2+)则采取六配位的模式,由bmib和H_(2)tdc配体共同桥连构成一维梯形链.结果表明金属中心对配合物的结构至关重要.热重分析显示2例配合物热稳定性较好.固体荧光性质表明配合物1和2有蓝色荧光特征,分别在460和470 nm处有最强荧光发射,有用作发光材料的潜在价值.

Two d^(10)metal complexes[Zn(bmib)(HCOO)_(2)]·3H_(2)O(1)and[Cd(bmib)_(0.5)(tdc)(DMF)(H_(2)O)](2)(bmib=1,4-bis(2-bethyl-1H-imidazol-1-yl)benzene,H_(2)tdc=2,5-thiophenedicarboxylic acid)were synthesized by solvent thermal conditions.The synthesis conditions of the two complexes were the similar except for different metal salts.However,structural analysis revealed that H_(2)tdc in complex 1 did not participate in coordination.Structure of complex 1 was a 1D Z-shaped chain formed by bmib ligand and Zn^(2+).Complex 2 is a 1D ladder chain composed of bmib,H_(2)tdc and Cd^(2+).Results show that metal ions play an important role in the structure of complexes.Thermogravimetric analysis showed that the two complexes had good thermal stability.Solid fluorescence properties indicated that complexes 1 and 2 had blue fluorescence with the strongest fluorescence emission peak at 460 nm and 470 nm,respectively,which have potential value as luminescent materials.