scholarly journals Five-Coordinate Zinc(II) Complex: Synthesis, Characterization, Molecular Structure, and Antibacterial Activities of Bis-[(E)-2-hydroxy-N′-{1-(4-methoxyphenyl)ethylidene}benzohydrazido]dimethylsulfoxidezinc(II) Complex

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Zhi-Qiang Liu ◽  
Yoke Mooi Ng ◽  
Pei Jen Tiong ◽  
Ruwaida Asyikin Abu Talip ◽  
Nornadia Jasin ◽  
...  
Keyword(s):  
Schiff Base ◽  
Dmso Molecule ◽  
Antibacterial Activities ◽  
Bidentate Ligand ◽  
Ethanol Solution ◽  
Metal Center ◽  
Diffusion Method ◽  
Spectral Studies ◽  
X Ray Diffraction ◽  
Vis Spectroscopy

The titled Zn(II) complex was synthesized by reacting the compound (E)-2-hydroxy-N′-{1-(4-methoxyphenyl)ethylidene}benzohydrazide with zinc(II) acetate dihydrate in alkaline DMSO and ethanol solution under reflux condition for 28 hours. The resulting solid was filtered and recrystallized from the mixture of ethanol and DMSO. The hydrazone Schiff base and its Zn(II) complex were characterized using 1H, 13C NMR, FTIR, UV-Vis spectroscopy, and single crystal X-ray diffraction analysis. Meanwhile, their antibacterial activities were examined using disc diffusion method. The spectral studies showed that the hydrazone Schiff base underwent keto-enol tautomerization, forming a bidentate ligand (N,O) towards Zn(II) ion. Surprisingly, on top of the two hydrazone Schiff base molecules which coordinated to the Zn metal center, an additional DMSO molecule was found attached to the Zn metal center in the crystal data, resulting in a 5-coordinate distorted trigonal bipyramidal Zn(II) complex. Both hydrazone Schiff base and its Zn(II) complexes were found to exhibit low antibacterial activity even when the concentrations were increased to 800 ppm.

scholarly journals Crystal structures of the bis-bidentate N2S2 Schiff base ligand and its copper(I) coordination polymer

2019 ◽  
Vol 38 (2) ◽  
pp. 207
Author(s):  
Aliakbar Dehno Khalaji ◽  
Seyyed Javad Peyghoun ◽  
Michal Dusek ◽  
Monika Kucerakova ◽  
Alireza Akbari ◽  
...  
Keyword(s):  
Schiff Base ◽  
Coordination Polymer ◽  
Elemental Analysis ◽  
Schiff Base Ligand ◽  
Bidentate Ligand ◽  
X Ray Diffraction ◽  
Trans Conformation ◽  
Vis Spectroscopy ◽  
Ft Ir ◽  
Anti Form

A new flexible bis-bidentate N2S2 Schiff base ligand (2,4-Cl-ba)2dapte = N,Nʹ-bis-(2,4-dichlorobenzaldehyde)-1,2-di(o-iminophenylthio)ethane and its copper(I) coordination polymer [Cu2(μ-I)2(μ-(2,4-Cl-ba)2dapte)]n, were synthesized and characterized by CHN elemental analysis, FT-IR and UV-Vis spectroscopy and single-crystal X-ray diffraction. The molecule of (2,4-Cl-ba)2dapte adopts a trans conformation of the 1,2-di(o-iminophenylthio)ethane unit. The (2,4-Cl-ba)2dapte acts as a bis-bidentate ligand with two iminic nitrogen and two sulfur atoms, coordinating to copper(I) ions in an anti-form leading to the dinuclear Cu2(μ-(2,4-Cl-ba)2dapte) groups. These groups are then bridged by two iodide anions to form a copper(I) coordination polymer [Cu2(μ-I)2(μ-(2,4-Cl-ba)2dapte)]n. The coordination geometry around the copper(I) ions is a distorted tetrahedron. Finally, a nano-sized form of the copper(I) coordination polymer [Cu2(μ-I)2(μ-(2,4-Cl-ba)2dapte)]n was prepared by an ultrasonic bath assisted process and characterized by elemental analysis, FT-IR and SEM.

scholarly journals Synthesis, characterization and antimicrobial activities of heteroleptic metal chelates of isoniazid and 2,2’-bipyridine

2021 ◽  
Vol 34 (3) ◽  
pp. 471-478
Author(s):  
O. F. Akinyele ◽  
E. G. Fakola ◽  
L. M. Durosinmi ◽  
T. A. Ajayeoba ◽  
A. O. Ayeni
Keyword(s):  
Antimicrobial Activity ◽  
Magnetic Moment ◽  
Antibacterial Activities ◽  
Antimicrobial Activities ◽  
Carbonyl Oxygen ◽  
Bidentate Ligand ◽  
Magnetic Data ◽  
Diffusion Method ◽  
Vis Spectroscopy ◽  
Structure Geometry

The Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) complexes of isoniazid (L1) mixed with 2,2-bipyridine (L2) were synthesized and characterized by solubility studies, percentage metal analysis, UV-Vis spectroscopy, IR spectroscopy, conductivity measurements and magnetic moment measurements. The IR spectra revealed that the isoniazid coordinated as a bidentate ligand. In Co(II) and Ni(II) complex it coordinated  via the carbonyl oxygen (C=O) and the amide nitrogen, while in the Cu(II), Mn(II) and Zn(II) complexes it coordinated using the amide and carbonyl oxygen via enolization. Bipyridine also bonded to the metals as a bidentate ligand through the pyridinic nitrogen atoms. The magnetic data showed that all the complexes were paramagnetic with values ranging from 1.70 to 5.0 B.M., except [Zn(Is)(Bipy)(H2O)Cl2] which was diamagnetic. The conductivity results revealed that the Cu(II), Mn(II), Zn(II) complexes were 1:1 electrolytes while Co(II) was 1:2 electrolyte and [Ni(Is)(Bipy)Cl2] was non-electrolytic in nature. The antibacterial activities of the ligands and the complexes as evaluated via the agar diffusion method showed that the complexes displayed moderately high antimicrobial activity in comparison with the free ligands when tested against ten strains of bacteria.                     KEY WORDS: Isoniazid, Electronic structure, Geometry, Antimicrobial activity, Electrolytic nature, Magnetic moment   Bull. Chem. Soc. Ethiop. 2020, 34(3), 471-478. DOI: https://dx.doi.org/10.4314/bcse.v34i3.4

scholarly journals Green Synthesis of Iron Nanoparticles by Acacia nilotica Pods Extract and Its Catalytic, Adsorption, and Antibacterial Activities

2018 ◽  
Vol 8 (10) ◽  
pp. 1922 ◽  
Author(s):  
Enshirah Da’na ◽  
Amel Taha ◽  
Eman Afkar
Keyword(s):  
Electron Microscopy ◽  
Iron Nanoparticles ◽  
Antibacterial Activities ◽  
Acacia Nilotica ◽  
Opportunistic Pathogens ◽  
X Ray Diffraction ◽  
Gram Positive Bacteria ◽  
Vis Spectroscopy ◽  
Adsorption Processes ◽  
Oxidation Degradation

Iron nanoparticles (FeNP) were synthesized using Acacia nilotica seedless pods extract. The synthesized FeNP were characterized by Fourier transform infrared (FTIR), UV/Vis spectroscopy, dynamic light scattering (DLS), electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray diffraction (XRD). The XRD pattern confirmed the synthesis of crystalline phase of α-Fe2O3. EDS spectroscopy showed the presence of elemental iron and oxygen, indicating that the nanoparticles are essentially present in oxide form. UV absorption in the range of 450–550 nm confirmed the formation of FeNP. DLS indicated an average FeNP particle size of 229 nm. The synthesized FeNP was tested for adsorption and oxidation degradation of methyl orange (MO) under different conditions and found to be effective in both degradation and adsorption processes. Furthermore, the synthesized FeNP has the potential to terminate the pathogenicity of several human opportunistic pathogens; belongs to gram-negative and gram-positive bacteria and one species of Candida as well.

scholarly journals Copper(II) and Zinc(II) Complexes Derived from N,N’-Bis(4-bromosalicylidene)propane-1,3-diamine: Syntheses, Crystal Structures and Antimicrobial Activity

2021 ◽  
Vol 68 (1) ◽  
pp. 102-108
Author(s):  
Yu-Mei Hao
Keyword(s):  
Escherichia Coli ◽  
Antimicrobial Activity ◽  
Candida Parapsilosis ◽  
Antibacterial Activities ◽  
X Ray Diffraction ◽  
Deprotonated Form ◽  
X Ray ◽  
Square Planar ◽  
Vis Spectroscopy ◽  
Elemental Analyses

A mononuclear copper(II) complex, [CuL] (1), and a phenolato-bridged trinuclear zinc(II) complex, [Zn3Cl2L2(DMF)2] (2), where L is the deprotonated form of N,N’-bis(4-bromosalicylidene)propane-1,3-diamine (H2L), have been prepared and characterized by elemental analyses, IR and UV-Vis spectroscopy, and single crystal X-ray diffraction. The Cu atom in complex 1 is in square planar coordination, while the terminal and central Zn atoms in complex 2 are in square pyramidal and octahedral coordination, respectively. The antibacterial activities of the complexes have been tested on the bacteria Staphylococcus aureus and Escherichia coli, and the yeast Candida parapsilosis.

scholarly journals Complexes of some 3d-metals with a Schiff base derived from 5-acetamido-1,3,4-thiadiazole-2-sulphonamide and their biological activity

2011 ◽  
Vol 76 (10) ◽  
pp. 1387-1394 ◽  
Author(s):  
Suman Malik ◽  
Suparna Ghosh ◽  
Liviu Mitu
Keyword(s):  
Schiff Base ◽  
Fungicidal Activity ◽  
Particle Size Analysis ◽  
Bidentate Ligand ◽  
Octahedral Geometry ◽  
Spectral Studies ◽  
Size Analysis ◽  
3D Metals ◽  
Complexes Of Transition Metals ◽  
The Stability

Using a bidentate ligand, a Schiff base of 5-acetamido-1,3,4- thiadiazole-2-sulphonamide, complexes of transition metals having the general formula ML2, where M = Mn(II), Fe(II), Ni(II) and Cu(II), were synthesized. The complexes were characterized by elemental analysis, molar conductivity, magnetic moment, electronic, ESR and IR spectroscopy, and particle size analysis. The conductivity data of the complexes suggests their non-electrolytic nature. The stability constants and free energy change for the complexes were calculated. Spectral studies and magnetic susceptibility measurements revealed an octahedral geometry for all the complexes. The ligand and its complexes were screened for their fungicidal activity against Aspergillus niger and A. flavus.

scholarly journals Anticoagulant, thrombolytic and antibacterial activities of Euphorbia acruensis latex-mediated bioengineered silver nanoparticles

2019 ◽  
Vol 8 (1) ◽  
pp. 590-599 ◽  
Author(s):  
Kaushik Roy ◽  
Ambikesh K. Srivastwa ◽  
Chandan K. Ghosh
Keyword(s):  
Silver Nanoparticles ◽  
Analytical Techniques ◽  
Antibacterial Activities ◽  
Diffusion Method ◽  
X Ray Diffraction ◽  
Antibacterial Study ◽  
X Ray ◽  
Transmission Electron ◽  
Human Blood Samples ◽  
Green Synthesized Silver Nanoparticles

Abstract In this report, we present a simple and unexplored procedure for green synthesis of silver nanoparticles featuring exudation of Euphorbia acruensis along with the study of its antibacterial and anticoagulant properties. Analytical techniques like ultraviolet visible spectroscopy (UV-Vis), X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM) were used to analyse the production, crystallinity and morphology of bio-reduced silver nanoparticles. The antibacterial study was performed by following standard disc diffusion method. Most importantly, the anticoagulant and thrombolytic activities of biogenic silver nanoparticles were evaluated by addition of nanoparticles to human blood samples under practical conditions. These green synthesized silver nanoparticles were found to have potent antibacterial, anticoagulant and thrombolytic properties which make them an attractive choice for future medical applications.

scholarly journals Effect of Various Parameters on Bio-Synthesis of Copper Nanoparticles Using Citrus Medica Linn (Lemon) Extract and Its Antibacterial Activity

2020 ◽  
Vol 1 (1) ◽  
pp. 51-58
Author(s):  
Sharmila Pradhan ◽  
Rajeswori Shrestha ◽  
Khuma Bhandari
Keyword(s):  
Antibacterial Activity ◽  
Copper Nanoparticles ◽  
Color Change ◽  
Diffusion Method ◽  
X Ray Diffraction ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Crystalline Nature ◽  
Bio Synthesis

This research is focused on bio-synthesis of Copper nanoparticles (CuNPs) using lemon extract to study the effect of various parameters on synthesis and to explore antibacterial activity. The biomolecules present in lemon extract act as self reducing and stabilizing agent. The synthesis of CuNPs was found to be affected by various parameters like volume of the lemon extract, concentration of the precursor and the temperature etc. Preliminary characterization of formation of nanoparticles were done by color change and UV-visible (UV-vis) spectroscopy. Elemental composition of the prepared sample was determined via Energy Dispersive X-ray (EDX) Spectroscopy. Presence of important functional groups associated with biomolecules is well characterized by Fourier Transform Infrared spectroscopy (FTIR). Scanning Electron Microscopy (SEM ) revealed the formation agglomerated CuNPs of different shape and sizes and the X-ray diffraction pattern showed the formation of purely crystalline nature of CuNPs. Finally, agar well diffusion method showed that CuNPs have potential antibacterial activity against Gram-ve bacteria compared to Gram +ve bacteria.

scholarly journals Synthesis, Characterization and Biological Activities of Cu(II), Co(II), Ni(II), Mn(II) and Fe(III) Complexes with Schiff Base Derived from 3-(4-Chlorophenoxymethyl)-4-amino-5-mercapto-1,2,4-triazole

2008 ◽  
Vol 5 (3) ◽  
pp. 529-538 ◽  
Author(s):  
Vidyavati Reddy ◽  
Nirdosh Patil ◽  
Tukaram Reddy ◽  
S. D. Angadi
Keyword(s):  
Schiff Base ◽  
Biological Activities ◽  
Antibacterial Activities ◽  
Coordination Complexes ◽  
Spectroscopic Studies ◽  
Bidentate Ligand ◽  
Magnetic Susceptibility Data ◽  
Susceptibility Data ◽  
H Nmr ◽  
Physicochemical Data

Coordination complexes of Cu(II),Co(II), Ni(II), Mn(II) and Fe(III)with Schiff bases derived from 3-(4-chlorophenoxymethyl)-4-amino-5-mercapto-1, 2, 4-triazole and substituted aldehydes have been synthesized. The complexes were characterized by elemental analysis, conductivity measurements, magnetic susceptibility data, electronic, IR, ESR and1H NMR spectral data. On the basis spectroscopic studies, the Schiff base is monobasic bidentate ligand having the composition ML2(2H2O) Where M = Cu(II), Co(II), Ni(II) ,Mn(II), ML2(H2O)Cl Where M = Fe(III). Various physicochemical data suggest a six coordinated octahedral geometry for Cu(II),Co(II), Ni(II), Mn(II) and Fe(III) complexes. The antibacterial activities of ligand and its complexes were screened by cup plate method.

Synthesis, Characterization, and Antimicrobial Activities of New Organic-Inorganic Hybird Compound Based on Polyoxovanadate and Metal-Schiff-Base Complex

2015 ◽  
Vol 1105 ◽  
pp. 215-219
Author(s):  
Qiong Wu ◽  
Xiao Lin Ji ◽  
Lu Jing ◽  
Hong Ping Ju ◽  
Hai Wang
Keyword(s):  
Schiff Base ◽  
Human Cancer ◽  
Synergetic Effect ◽  
Schiff Base Complex ◽  
Antimicrobial Activities ◽  
Schiff Base Complexes ◽  
X Ray Diffraction ◽  
Base Complex ◽  
X Ray ◽  
Vis Spectroscopy

The reaction of polyoxovanadate and metal-Schiff base complex resulted in the formation of a new organic-inorganic hybrid compounds with the formula Na2[Mn (Salen)(H2O)2]4[V10O28]·9H2O (1) (salen=N,N’-ethylene-bis (salicylideneiminate). Compound 1 have been structurally characterized by IR, UV-vis spectroscopy and single crystal X-ray diffraction. Crystal data for 1: Triclinic, P-1, a=14.1123(3)Å, b=13.9397(7) Å, c=14.2564(5)Å, α=65.4160(9)°, β=81.3920(6)°, γ=89.5740(7) °. Structural analyses revealed that compound 1 represent a rare example of isopolyoxovanadate based metal-Schiff-base complexes, moreover, this is the first POM based metal Schiff-base complex isolated in aqueous solution medium, which may also propose a green chemical way to the synthesis of POM based hybrid. Compare with isopolyoxovanadate precusor Na6 [V10O28], compound 1 exhibit higher antimicrobial activities against human cancer cell, the phenomenon can be explained by the synergetic effect between POM and Schiff-base complex.

scholarly journals Some Organotellurium(IV) Complexes of 1-Methyl-3-(p-tolylimino)indolin-2-one Schiff Base

2021 ◽  
Vol 33 (6) ◽  
pp. 1236-1244
Author(s):  
Manish Kumar ◽  
K.K. Verma ◽  
Sapana Garg
Keyword(s):  
Schiff Base ◽  
Xanthomonas Campestris ◽  
Computational Study ◽  
Molar Conductance ◽  
Bidentate Ligand ◽  
Octahedral Geometry ◽  
Azomethine Nitrogen ◽  
Spectral Studies ◽  
Distorted Octahedral Geometry ◽  
No Donor

Six new hexa-coordinated organotellurium(IV) complexes of type RTeCl3·NMeIPT and R2TeCl2·NMeIPT (R = 4-hydroxyphenyl, 4-methoxyphenyl or 3-methy-4-hydroxyphenyl; NMeIPT(L) = Schiff base (1-methyl-3-(p-tolylimino)indolin-2-one) derived from condensation of 4-methylisatin and p-toluidine) have been synthesized and characterized by different spectral studies like elemental analyses, molar conductance, infrared, mass spectrometry, 1H NMR, 13C NMR and UV-visible spectroscopy. On the basis of spectroscopic data, it is evident that Schiff base behaves as NO donor bidentate ligand via azomethine nitrogen atom and oxygen atom from carbonyl group for all the tellurium(IV) complexes. The results showed that all the organotellurium(IV) complexes possess distorted octahedral geometry. Geometry of the all organotellurium(IV) complexes was optimized and their theoretical quantum mechanical parameters were calculated. This computational study also suggests octahedral geometry for complexes. The antimicrobial activity of NMeIPT and all the organotellurium(IV) complexes were screened against bacteria i.e. Xanthomonas campestris and Bacillus cereus and fungi i.e. Fusarium oxysporum, Candida albicans and Sclerotinia sclerotium.

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