3-乙基-2-乙酰吡嗪缩4-甲基氨基硫脲Ni(Ⅱ)/Zn(Ⅱ)配合物的合成、结构和DNA结合性质（英文）

Ni(Ⅱ)/Zn(Ⅱ) Complexes with 1-(3-Ethylpyrazin-2-yl)ethylidene)-4-methylthiosemicarbazide: Crystal Structures and DNA-Binding Properties

合成并通过单晶衍射、元素分析、红外光谱表征了配合物[Ni L(HL)](OAc)(1)和[Zn L(OAc)]n(2)的结构(HL=3-乙基-2-乙酰吡嗪缩4-甲基氨基硫脲)。单晶衍射结果表明,配合物1中的Ni髤离子与来自2个缩氨基硫脲配体的4个N原子和2个S原子配位,其中一个配体为阴离子。而配合物2中,五配位的Zn髤离子采取扭曲的四方锥配位构型,与2个μ-OCO桥联的醋酸根,一个三齿配位的缩氨基硫脲阴离子配位,形成沿a轴方向的一维链状结构。此外,荧光光谱结果表明,配合物与DNA的相互作用强于配体。

Two complexes [Ni L（HL）]（OAc）（1） and [Zn L（OAc）]n（2）（HL =1-（3-ethylpyrazin-2-yl）ethylidene）-4-methylthiosemicarbazide） have been synthesized and structurally determined by single-crystal X-ray diffraction.The results show that the Ni （Ⅱ） ion in 1 is surrounded by two independent thiosemicarbazone ligands with N4 S2 donor set, one of which is anionic. However, in complex 2, the Zn （Ⅱ） ion with a distorted tetragonal pyramid coordination geometry is five-coordinated, involving two μ-OCO acetate anions, one tridentate enolizated ligand L-, thus forming one dimension chain-like framework along a axis. Moreover, the fluorescence spectra indicate that the interactions of the complexes with DNA are stronger than that of the thiosemicarbazone ligand. CCDC：1587278, 1; 1587280, 2.