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（英文）

Two Trinuclear Cobalt(Ⅱ) Salamo-Type Complexes:Syntheses, Crystal Structures, Solvent Effect and Fluorescent Properties

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[Co_3L(OAc)_2(CH_3CH_2OH)_2]·2CH_3CH_2OH·2CHCl_3(1)和[Co_3L(OAc)_2(C_3H_7OH)_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N_2O_2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·2CHC13 （1） and [Co3L（OAe）2 （C3HTOH）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 （HzL） with eobalt（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-eoordinated 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.