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Synthesis, characterization, optical and anti-bacterial properties of benzothiazole Schiff bases and their lanthanide (III) complexes
Journal of Saudi Chemical Society ( IF 5.8 ) Pub Date : 2020-10-15 , DOI: 10.1016/j.jscs.2020.09.009
Neha Mishra , Kaushal Kumar , Himanshu Pandey , Satyesh Raj Anand , Ritu Yadav , Satya Prakash Srivastava , Rampal Pandey

Two new Schiff base ligands comprising benzothiazole derivatives, namely (N,N',E,N,N'E)-N,N'-(1,3-phenylenebis(methanylylidene))bis(5-nitrobenzo[d]thiazoL2-amine (L1) and (N,N',E,N,N'E)-N,N'-(1,3-phenylene-bis(methanylylidene))bis(5-methylthiazo-L2-amine (L2), have been synthesized and thoroughly characterized using FTIR, 1H NMR, mass UV/vis and fluorescence spectral techniques. Further, L1 and L2 lead to the formation of lanthanide complexes 1-6 with Ce(III), Nd(III), and Pr(III) ions in 1:2 (metal : ligand) stoichiometry. UV/vis spectra of L1, L2 and 1-6 exhibit characteristic ligand centered absorptions in the range of 230-350 nm. Besides, both ligands and complexes show significant emissions and good anti-bacterial activity against pathogenic bacteria. Ligands and complexes display anti-bacterial activity against bacteria Staphylococcus aureus (S.aureus) (MTCC 1144) causing skin infection and food poisoning and pimple-causing bacteria propionic bacteria acnes (P. acnes) (MTCC 1951).



中文翻译:

苯并噻唑席夫碱及其镧系元素(III)配合物的合成,表征,光学和抗菌性能

两个新的包含苯并噻唑衍生物的席夫碱配体,即(N,N',E,N,N'E)-N,N'-(1,3-亚苯基双(亚甲基亚烷基))双(5-硝基苯并[d]噻唑L2-胺(L1)和(N,N',E,N,N'E)-N,N'-(1,3-亚苯基-双(亚甲基亚烷基))双(5-甲基噻唑-L2-胺(L2),已通过FTIR,1 H NMR,质量UV / vis和荧光光谱技术进行了合成和彻底表征。此外,L1L2导致与Ce(III),Nd(III)和Pr形成镧系元素配合物1-6化学计量比为1:2(金属:配体)的(III)离子L1L21-6的UV / vis光谱在230-350 nm范围内表现出以配体为中心的特征吸收。此外,配体和配合物均显示出显着的发射和对病原菌的良好抗菌活性。配体和复合物对金黄色葡萄球菌S.aureus)(MTCC 1144)表现出抗菌作用,导致皮肤感染,食物中毒和丘疹细菌,丙酸痤疮P. acnes)(MTCC 1951)。

更新日期:2020-10-16
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