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·2CHCl3(1)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1和2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1和2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.%Two trinuclear Co(Ⅱ) complexes,[Co3L(OAc)2(CH3CH2OH)2]·2CH3CH2OH·2CHCl3 (1) and [Co3L(OAc)2(C3HTOH)2] (2) were synthesized by the reaction of a new Salamo-type bisoxime chelating ligand of 4,4′-dinitro2,2′-(1,2-ethylenedioxybis (nitrilomethylidyne))diphenol (H2L) with cobah(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.CCDC:1511306,1;1511308,2.
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