Synthesis, Characterization and Antibacterial Studies of Oxovanadium Complexes of Tetradentate Schiff Base Derived from 4-Aminoantipyrine, o-Phenylene diamine and Vanillin/Furfural
作者:N. Gayathri、M.S. Suresh
DOI:10.14233/ajchem.2017.20227
日期:——
A series of hexa-coordinated organotin(IV) complexes of type R2SnLn [R = Ph, Bu, Et, Me] has been synthesized from Schiff base ligands (H2L1-3) derived from 2,3-diaminopyridine and 2-hydroxy-1-naphthaldehyde, salicylaldehyde, 5-bromosalicylaldehyde (where H2L1 = 2,2-(1E,1E)-(pyridine-2,3-diylbis(azan-1-yl-1-ylidene))bis(methan-1-yl-1-ylidene)dinaphthalen-1-ol, H2L2 = 2,2-(1E,1E)-(pyridine-2,3-diylbis(azan-1-yl-1-ylidene))bis(methan-1-yl-1-ylidene)diphenol, H2L3 = 2,2-(1E,1E)-(pyridine-2,3-diylbis(azan-1-yl-1-ylidene))bis(methan-1-yl-1-ylidene)bis(4-bromophenol) under inert atmosphere in 1:2 molar ratio. The bonding behaviour, composition and the structural assignment of the synthesized organotin complexes have been characterized by the spectroscopic analysis (1H, 13C and 119Sn NMR, FT-IR, electronic spectra) and elemental analysis. The coordination of the synthesized complexes has been anticipated as hexa-coordinated with the tin atom with ONNO donor system and the ligands are coordinated to the tin atom as tetradentate. The prepared Schiff base ligands and their organotin complexes are evaluated for the antibacterial and antifungal activities against Gram-positive, Gram-negative bacteria and fungi. The complexes show more biological potency in the antimicrobial activities as compared to the ligands.
由 2,3-二氨基吡啶和 2-羟基-1-萘甲醛、水杨醛、5-溴水杨醛衍生的希夫碱配体(H2L1-3)合成了一系列 R2SnLn [R = Ph、Bu、Et、Me] 型六配位有机锡(IV)配合物(其中 H2L1 = 2,2-(1E,1E)-(吡啶-2、2,2-(1E,1E)-(吡啶-2,3-二基双(偶氮-1-基-1-亚基))双(甲烷-1-基-1-亚基)二萘-1-醇,H2L2 = 2,2-(1E,1E)-(吡啶-2,3-二基双(偶氮-1-基-1-亚基))双(甲烷-1-基-1-亚基)二苯酚、H2L3 = 2,2-(1E,1E)-(吡啶-2,3-二基双(偶氮-1-基-1-亚基))双(甲烷-1-基-1-亚基)双(4-溴苯酚),在惰性气氛中以 1:2 的摩尔比。通过光谱分析(1H、13C 和 119Sn NMR、傅立叶变换红外光谱、电子能谱)和元素分析,对合成的有机锡配合物的成键行为、组成和结构分配进行了表征。预计合成的配合物与锡原子的配位为 ONNO 供体系统的六配位,配体与锡原子的配位为四配位。对所制备的希夫碱配体及其有机锡配合物进行了抗菌和抗真菌活性评估,以对抗革兰氏阳性、革兰氏阴性细菌和真菌。与配体相比,配合物显示出更强的抗菌活性。