摘要
合成了亮氨酸水杨醛希夫碱及其与Ｍｎ（Ⅱ），Ｃｏ（Ⅱ），Ｎｉ（Ⅱ），Ｃｕ（Ⅱ），Ｚｎ（Ⅱ）的配合物。元素分析和摩尔电导测定的结果证明，亮氨酸水杨醛希夫碱３ｄ金属配合物配位比为１１，配合物在ＤＭＦ中为非电解质。在硅胶Ｇ板上，以乙酸乙酯－甲醇－丙酮－水－乙酸（４．４４３．３３２．２２０．２５０．１２，Ｖ／Ｖ）为流动相，研究了配合物的薄层色谱行为，各组分配合物的比移值Ｒｆ值相差较大，得到满意的分离，且Ｒｆ值按下列顺序递增Ｍｎ＜Ｚｎ＜Ｎｉ＜Ｃｕ＜Ｃｏ。讨论了系列配合物薄层色谱Ｒｆ与紫外光谱Ｒ带λｍａｘ变化关系的规律性。
The Schiff base derived from salicylaldehyde and leucine and its Mn(Ⅱ), Co(Ⅱ), Ni(Ⅱ), Cu(Ⅱ), Zn(Ⅱ) complexes were synthesized. The purity of the products obtained was confirmed by elemental analysis. The results of elemental analysis and molar conductance show that coordination ratio with M(Ⅱ) is 1∶1 and its complexes are nonelectrolyte in DMF. The thinlayer chromatography behavior of complexes was studied on silica gel G plate with ethyl acetatemethanolacetonewateracetic acid (4.44∶3.33∶2.22∶0.25∶0.12,V/V) as mobile phase. The results show that the R f value of complexes increases as follows:Mn<Zn<Ni<Cu<Co. The λmax values of ultraviolet spectra of ligand and complexes are determined in methanol and DMSO. The λmax values of complexes increase as follows:Mn(Ⅱ)<Zn(Ⅱ)<Ni(Ⅱ)<Cu(Ⅱ)<Co(Ⅱ)<ligand. The Rf values and R band λmax values of complexes change in the same direction as the stability constants of the complexes. This proves that the Rf values of complexes on silica gel G and R band λmax values of complexes depend on coordinaton of M(Ⅱ) with ligand.
出处
《色谱》
CAS
CSCD
北大核心
1997年第5期425-427,共3页
Chinese Journal of Chromatography
基金
山东省自然科学基金
关键词
薄层色谱
紫外光谱
亚水杨基
亮氨酸
配合物
thinlayer chromatography, ultraviolet spectrum R band,Nsalicylidene leucine, 3d metalcomplexes
