3-乙基-2-乙酰吡嗪缩4-苯基氨基脲铜/锌配合物的晶体结构及荧光性质（英文）

Crystal Structures and Fluorescence Property of Cu(Ⅱ)/Zn(Ⅱ) Complexes of 1-(3-Ethylpyrazin-2-yl)ethylidene-4-phenylsemicarbazide

合成了配合物[Cu(HL)(H_2O)(NO3)]NO3(1)和[Zn(HL)Cl2](2)(HL为3-乙基-2-乙酰吡嗪缩4-苯基氨基脲),并通过单晶X射线衍射、元素分析及红外光谱表征了结构。单晶衍射结果表明,配合物1中,中心Cu(Ⅱ)离子与1个中性三齿缩氨基脲配体,1个水分子和1个硝酸根配位,配位构型为扭曲的四方锥。配合物2中Zn(Ⅱ)离子周围的配位原子为N2OCl2,其配位构型与配合物1中Cu(Ⅱ)离子的相同。甲醇溶液中,配合物2的荧光发射峰与配体HL相似。而配合物1由于配体和金属离子之间的能量转移,最大荧光发射峰略有红移。

Two complexes, namely[Cu（HL）（H2O）（NO3）]NO3 （1） and [Zn（HL）Cl2] （2） （where HL is 1-（3-ethylpyrazin-2-yl）ethylidene-4-phenylsemicarbazide） have been synthesized and characterized by single crystal X-ray diffraction, elemental analysis and IR spectroscopy. X-ray diffraction analysis results show that in complex 1, the center Cu（Ⅱ） ion is penta-coordinated by one neutral tridentate semicarbazone, one coordinated water molecule and one monodentate nitrate, thus giving a distorted square pyramid coordination geometry. The coordination geometry of the Zn（Ⅱ） ion in complex 2 is same as that of the Cu（Ⅱ） ion in complex 1, while with N2OCl2 donor set. In methanol solution, the fluorescence spectra of the ligand HL and complex 2 are quite similar, whilst the emission peak of complex 1 has slightly red-shift, primarily due to the charge transfer between the ligand and metal ion. CCDC：1497370, 1; 1497371, 2.