脱氢枞胺(5-硝基)水杨醛Schiff碱及其金属配合物的合成、晶体结构及性质研究

合成了脱氢枞胺(5-硝基)水杨醛Schiff碱及其Cu2 、Zn2 、Co2 和Ni2 配合物,用IR、1HNMR,UV-vis,摩尔电导及单晶X射线衍射对其进行结构表征.Cu(L)2形成经典的N2O2配体配合物,属于单斜晶系,C2空间群,晶胞参数为:a=3.6996nm,b=1.0835nm,c=1.2856nm,α=90°,β=103.36°,γ=90°.研究了溶剂的极性对配体和配合物紫外光谱变化的影响,当改变溶剂时,配体能发生分子内质子转移,从醇式结构变成酮式结构.金属配合物能溶于有机溶剂,摩尔电导率数据表明它们在二甲基甲酰胺、氯仿和甲苯中是非电解质,容易发生溶致变色性能.对配体及配合物进行了抑制大肠杆菌、金黄色葡萄球菌及枯草芽苞杆菌的生物活性测定,配体及配合物都表现出一定的生物活性,其中Cu配合物的活性最强,说明配合物的生物活性与金属有关.

Syntheses, Crystal Structure and Properties of Dehydroabietylamine 5-Nitro-sacyldiene Schiff Base and Its Metal Complexes

Dehydroabietylamine 5-nitro-sacyldiene Schiff base(L) and its Cu2+, Zn2+, Co2+ and Ni2+ complexes were synthesized and characterized by IR, 1 H NMR, UV-vis spectrometric spectra, molar conductivity and single crystal X-ray diffraction. Cu(L) 2 forms a classical complex with N2 O2 donor, it is in monoclinic system with space group C2 and cell dimensions: effects of organic solvents of various polarities on the UV-vis spectrometric spectra of ligand and complexes were investigated. With change of solvent,the ligand can change from enol to keto structure. The metal complexes are easily dissolved in organic solvents.The molar conductivities indicate their non-electrolyte properties in all these organic solvents such as DMF, chloroform and toluene. UV-vis spectrometric spectra change with the polarity of solvent, both ligand and complex show solvatochromism in these solvents. The ligand and its metal complex were also screened against S.aureus, B.subtilis and E.coli, the antibacterial screening data showed that both ligand and complex exhibit biological activity, while Cu complex was the strongest one. The obtained results indicated that polarity of solvent has great effect on the UV-vis spectrometric spectra of ligand and complex, the biological activity of metal complex has intimate relationship with metal.