喹啉酰腙铜锌配合物的结构及荧光性质（英文）

Cu(Ⅱ) and Zn(Ⅱ) Complexes with an Acylhydrazone Ligand Bearing Quinoline Unit: Crystal Structures and Fluorescence Property

合成了配合物{[Cu(L)(OAc)]·Me OH}n(1)和[Zn(L)(OAc)]n(2)(HL为喹啉-8-甲醛缩异烟肼),并通过单晶X射线衍射、元素分析、红外光谱表征了结构。单晶衍射结果表明,除了结晶溶剂不同,2个配合物结构类似。每个配合物中,中心金属离子与来自烯醇化脱质子配体L-的2个O原子和1个N原子,1个单齿配位的醋酸根和相邻配体4-吡啶N原子配位,形成一维链状结构。但配合物中金属离子的配位构型分别为扭曲的四方锥和三角双锥。在360 nm紫外光激发下,甲醇溶液中配合物2在510 nm左右有很强的荧光发射,这是由锌离子配位荧光增强效应所导致。

Two complexes, {[Cu（L）（OAc）]·MeOH}n（1） and [Zn（L）（OAc）]n（2） （HL is the acylhydrazone ligand derived from 8-formylquinoline and isonicotinohydrazide） have been synthesized and characterized by single-crystal X-ray diffraction, elemental analysis and IR spectroscopy. X-ray diffraction analysis results show that the structures of both complexes are quite similar. The metal ion in each complex is five-coordinated, involving one monodentate acetate anion, NO2 donor set of an enolizated ligand L- and one pyridine nitrogen atom from another adjacent acylhydrazone ligand, thus forming one dimension chain-like framework. The coordination geometry of the centre ion is a distorted tetragonal pyramid in 1, whilst a trigonal bipyramid in 2. When excited at 360 nm, complex 2 exhibits strong emission at about 510 nm in methanol solution, primarily due to the CHEF effect of the Zn（Ⅱ） ion. CCDC： 1414665, 1; 1489193, 2.