两个三核钴(II)Salamo型配合物的合成、晶体结构、溶剂效应和荧光性质
Two Trinuclear Cobalt(II) Salamo-Type Complexes: Syntheses, Crystal Structures, Solvent Effect and Fluorescent Properties
作者单位E-mail
王莉 兰州交通大学化学与生物工程学院, 兰州 730070  
康全鹏 兰州交通大学化学与生物工程学院, 兰州 730070  
郝静 兰州交通大学化学与生物工程学院, 兰州 730070  
张阳 兰州交通大学化学与生物工程学院, 兰州 730070  
白杨 兰州交通大学化学与生物工程学院, 兰州 730070  
董文魁 兰州交通大学化学与生物工程学院, 兰州 730070 dongwk@126.com 
摘要: 通过四水乙酸钴(Ⅱ)和Salamo型双肟配体4,4'-二硝基-2,2'-(1,2-乙二氧双(氮次甲基))二酚(H2L)在不同溶剂中的配位反应,合成了2种不同溶剂参与配位的三核钴(Ⅱ)配合物,即[Co3L(OAc)2(CH3CH2OH)2]·2CH3CH2OH·2CHCl31)和[Co3L(OAc)2(C3H7OH)2](2),并通过元素分析、红外光谱、紫外-可见光谱和单晶X射线衍射法对其进行了性质表征。在配合物12中,存在2个配体单元(提供N2O2配位原子),2个乙酸根离子,2个配位的乙醇或正丙醇分子。虽然2个配合物是在不同溶剂中合成的,但配合物中的钴(Ⅱ)离子均采用稍微扭曲的八面体几何构型。结果表明,溶剂效应在配合物的配位环境中起了关键的作用。另外,配合物12在激发波长为450 nm时能表现出强烈的光致发光,其最大发射波长分别为568和566 nm。
关键词: Salamo型双肟配体  钴(II)配合物  合成  晶体结构  荧光性质
基金项目: 国家自然科学基金(No.21361015,21761018)资助项目。
Abstract: Two trinuclear Co(Ⅱ) complexes,[Co3L(OAc)2(CH3CH2OH)2]·2CH3CH2OH·2CHCl3 (1) and[Co3L(OAc)2(C3H7OH)2] (2) were synthesized by the reaction of a new Salamo-type bisoxime chelating ligand of 4,4'-dinitro-2,2'-(1,2-ethylenedioxybis(nitrilomethylidyne))diphenol (H2L) with cobalt(Ⅱ) acetate tetrahydrate in different solvents. Complexes 1 and 2 were characterized by elemental analyses, IR and UV-Vis spectra, and single crystal X-ray diffraction methods. In complexes 1 and 2, there are two ligand L2- moieties (which provide N2O2 donors), two acetate ions, two coordinated ethanol or n-propanol molecules, respectively. Although the two complexes were synthesized in different solvents, it is worthwhile that the Co(Ⅱ) ions in the structures of the two complexes adopt slightly distorted hexa-coordinated geometries. As a result, solvent effect was assumed to have played a crucial role in their coordination environment. In addition, when excited at 450 nm, the complexes 1 and 2 show an intense photoluminescence with maximum emission at ca. 568 and 566 nm, respectively.
Keywords: Salamo-type bisoxime ligand  Co (II) complex  synthesis  crystal structure  luminescence property
投稿时间:2017-07-27 修订日期:2017-12-07
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王莉,康全鹏,郝静,张阳,白杨,董文魁.两个三核钴(II)Salamo型配合物的合成、晶体结构、溶剂效应和荧光性质[J].无机化学学报,2018,34(3):525-533.
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