Three Schiff base ligands which contain N2O2 donors and their oxo-vanadium(IV) complexes have been synthesized. The ligand C14H16N2O2 has obtained as a result of the reaction of 1,4-diaminobutane with 2-furan-carboxyaldehyde within the framework of Schiff base condensation method. The same reaction path is followed replacing 1,4-diaminobutane by 1,6-diaminohexane and 1,8-diaminooctane in separate reactions to obtain the two other new ligands. Then, the synthesized ligands are employed to attain the oxo-vanadium(IV) complexes as results of their reactions with VOSO4.H2O. The ligands have been characterized by FTIR, 13C NMR, 1H NMR, and LC/ESI-MS. The VO(IV) complexes have been elucidated by FTIR, LC/ESI-MS, energy dispersive X-ray spectroscopy, thermogravimetric methods, and the conductivity and magnetic susceptibility measurements. The antibacterial activities of the ligands and their complexes have been determined on the microorganisms which are aligned as Escherichia coli ATCC 25922, Salmonella typhimurium ATCC 14028, Staphylococcus aureus ATCC 25923, Listeria monocytogenes ATCC 19115 and Bacillus cereus ATCC 11778. The complexes, in general, appeared to be more active than their parent ligands. All the activities can be classified as moderate in comparison with the corresponding antibiotic effect on the same bacteria.

中文翻译：

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具有柔性烷基间隔基的N2O2四齿配体的VO（IV）配合物：合成，表征和抗菌活性

合成了三种含有N2O2供体的Schiff碱配体及其氧代钒（IV）配合物。在Schiff碱缩合方法的框架内，通过1，4-二氨基丁烷与2-呋喃-甲醛的反应获得了配体C14H16N2O2。遵循相同的反应路径，在分开的反应中用1，6-二氨基己烷和1，8-二氨基辛烷代替1，4-二氨基丁烷以获得另外两个新的配体。然后，将合成的配体用于与VOSO4.H2O反应，从而获得氧-钒（IV）配合物。通过FTIR，13 C NMR，1 H NMR和LC / ESI-MS对配体进行了表征。VO（IV）配合物已通过FTIR，LC / ESI-MS，能量色散X射线光谱法，热重法以及电导率和磁化率测量得到了阐明。配体及其复合物的抗菌活性已在与大肠杆菌ATCC 25922，鼠伤寒沙门氏菌ATCC 14028，金黄色葡萄球菌ATCC 25923，单核细胞增生李斯特菌ATCC 19115和蜡状芽孢杆菌ATCC 11778对齐的微生物上进行了测定。似乎比其母体配体更具活性。与对相同细菌的相应抗生素作用相比，所有活动都可以归为中等。