Design and development of several polymeric metal–organic frameworks, spectral characterization, and their antimicrobial activity
作者:Shamim Ahmad Khan、Shahnawaz Ahmad Bhat、Shahab A.A. Nami、Abdul Kareem、Nahid Nishat
DOI:10.1016/j.crci.2018.07.003
日期:2018.9
Résumé Coordination polymers were obtained by the reaction of metal acetates, M(CH3COO)2·xH2O where M = Mn(II), Co(II), Ni(II) and Cu(II)} with AFP ligand (AFP = 5,5'-(piperazine-1,4-diylbis(methylene))bis(2-aminobenzoic acid). The AFP ligand was prepared by the one-pot, two-step reaction of formaldehyde, 2-aminobenzoic acid, and piperazine. Structural and spectroscopic properties have been studied by elemental, spectral (FT-IR, 1H NMR, 13C NMR, and UV–vis), and thermogravimetric analysis. UV–vis spectra and magnetic moment values indicate that Mn(II), Co(II), and Ni(II) polymer–metal complexes are octahedral, while Cu(II) and Zn(II) polymer–metal complexes are distorted octahedral and tetrahedral, respectively. The analytical data confirmed that the coordination polymers of Mn(II), Co(II), Ni(II), and Cu(II) are coordinated with two water molecules, which are further supported by infrared spectra and thermogravimetric analysis data. The prepared polymer–metal complexes showed good antibacterial activities against all tested microorganisms; however, the AFP ligand was also found to be effective, but relatively less than their polymer–metal complexes. Along with antibacterial activity, all the polymer–metal complexes exhibit significant antifungal activity against most of the tested fungal strains. The results of antimicrobial activity reveals that the AFP–Cu(II) showed the highest antibacterial and antifungal activity than other polymer–metal complexes.
摘要 通过金属醋酸盐 M(CH3COO)2-xH2O 其中 M = Mn(II)、Co(II)、Ni(II) 和 Cu(II)} 与 AFP 配体(AFP = 5,5'-(哌嗪-1,4-二基双(亚甲基))双(2-氨基苯甲酸))的反应获得了配位聚合物。AFP 配体是通过甲醛、2-氨基苯甲酸和哌嗪的一锅两步反应制备的。通过元素分析、光谱分析(傅立叶变换红外光谱、1H NMR、13C NMR 和紫外-可见光谱)和热重分析研究了该配体的结构和光谱特性。紫外-可见光谱和磁矩值表明,锰(II)、钴(II)和镍(II)聚合物-金属配合物为八面体,而铜(II)和锌(II)聚合物-金属配合物分别为畸变八面体和四面体。分析数据证实,Mn(II)、Co(II)、Ni(II)和Cu(II)的配位聚合物与两个水分子配位,红外光谱和热重分析数据进一步证实了这一点。制备的聚合物-金属配合物对所有测试微生物都显示出良好的抗菌活性;然而,AFP 配体也被发现具有抗菌活性,但相对低于其聚合物-金属配合物。除抗菌活性外,所有聚合物-金属复合物还对大多数受试真菌菌株具有显著的抗真菌活性。抗菌活性结果显示,AFP-Cu(II) 的抗菌和抗真菌活性高于其他聚合物-金属配合物。