Synthesis, structural features, antibacterial behaviour and theoretical investigation of two new manganese(III) Schiff base complexes

Abstract

Synthesis, structural features, antibacterial behaviour and theoretical investigation of two new manganese(III) Schiff base complexes,

Effects of metal–organic complex Ni(Salen) on thermal decomposition of 1,1-diamino-2,2-dinitroethylene (FOX-7)

“…The coordination structure derived from the above FTIR characteristics is in good coincidence with the crystal structure reported in the literature. 38 In addition, it is noticed that, three absorption bands belonging to the benzene ring (1611.9, 1577.2, 1497.3 cm À1 ) are observed on the Salen spectrum, whereas only two bands (1597.8, 1535.5 cm À1 ) are present on the spectrum of Ni(Salen). The reason for the phenomenon is that, the electron donor capacity of oxygen atoms of the phenolic hydroxyl group to the benzene ring is increased due to the existence of Ni, thus leading to the changes in the position and number of absorption peaks of the carbon frame.…”

“…[25][26][27][28] In the past two decades, the thermal decomposition of FOX-7 has been extensively studied by taking advantages of the catalytic activity of single-metal oxides and composite oxides, including Fe 2 O 3 , 29 The compounds based on the Schiff bases with various structures, possess many interesting properties including catalytic, magnetic and biological properties. [33][34][35][36][37][38] Specically, they have been proved to have high catalytic activity in the hydrogenation of cyclohexene reaction, carbene reaction, and nitrogen cycle reaction. 33,39 It is noticed that nitrogen cycle reactions are involved in the thermal decomposition of FOX-7 and the combustion processes of propellants containing FOX-7.…”

Synthesis, Structural Characterization, Reactivity and Bioactivity Studies of Some Binuclear Salen Type Schiff Base Complexes of Manganese(III)

“…These group of tridentate ligands is used extensively for the synthesis of mono-, di-and polynuclear complexes with first row transition metals [21][22][23][24][25] as well as precursors for the synthesis of unsymmetrical tridentate Schiff base complexes [26,27]. Complexes of tetradentate schiff base ligands usually formed by the condensation reaction between diamines and salicylaldehyde or salicylaldehyde derivatives often crystallizes as phenoxo-bridged dimmers, which may show a range of magnetic interactions depending upon bridged geometry [28][29][30][31][32][33][34][35] and these complexes may also show ferro or antiferromagnetic interactions [36][37][38][39][40]. The present work focuses on the syntheses, characterization and structural assessment of new phenoxo-bridged binuclear complexes of manganese(III) with N,N′-O phenylenebis(salicylaldimine) ligand.…”

Evaluation of metal-based antimicrobial compounds for the treatment of bacterial pathogens

“…Compound 2 had a MIC value of 500 µg ml −1 against V. cholerae non. 0139 , Escherichia coli and Streptococcus pneumoniae [ 179 ]. The compounds were also tested on other human pathogenic strains but had no significant antibacterial effects.…”

“…Mn(I), Mn(II) and Mn(III) have demonstrated in vitro antibacterial activity against varying strains of Gram-positive bacteria and M. tuberculosis, although their specificity for bacterial species and the ligands used in these metal complexes vary [177][178][179].…”