scholarly journals Synthesis, Characterization, Antimicrobial and Theoretical Studies of V(IV),Fe(III),Co(II),Ni(II), Cu(II), and Zn(II)Complexes with Bidentate (NN) Donar Azo Dye Ligand

2016 ◽  
Vol 13 (4) ◽  
pp. 793-805
Author(s):  
Baghdad Science Journal
Keyword(s):  
Metal Complexes ◽  
Pathogenic Bacteria ◽  
Thermal Analyses ◽  
Heat Of Formation ◽  
Ratio Method ◽  
Theoretical Treatment ◽  
Spectroscopic Techniques ◽  
Ft Ir ◽  
Experimental Values ◽  
New Compounds

The new 4-[(7-chloro-2,1,3-benzoxadiazole)azo]-4,5-diphenyl imidazole (L) have been synthesized and characterized by micro elemental and thermal analyses as well as 1H.NMR, FT-IR, and UV-Vis spectroscopic techniques. (L) acts as a ligand coordinating with some metal ionsV(IV), Fe(III), Co(II), Ni(II), Cu(II), and Zn(II). Structures of the new compounds were characterized by elemental and thermal analyses as well as FT-IR and UV-Vis Spectra. The magnetic properties and electrical conductivities of metal complexes were also determined. Study of the nature of the complexes formed in ethanol following the mole ratio method.. The work also include a theoretical treatment of the formed complexes in the gas phase, this was done using the (hyperchem-8) program for the molecular mechanics and semi-empirical calculations. The heat of formation (?Hf?), binding energy (?Eb)and total energy (?ET) for ligand and their metal complexes were calculated by (PM3) method at 298 K.The electrostatic potential of the ligand (L) was calculated to investigate the reactive sites of the molecules. PM3 were used to evaluate the vibrational and electronic spectra for the ligand (L) and their metal complexes then comparing with the experimental values. The antibacterial activity for the (L)and its metal complexes were studied against two types of pathogenic bacteria Pseudonomous aerugionosa as gram negative and Bacillus subtilis as gram positive. Furthermore, the antifungal activity against two fungi Candida albicans, and Aspergillus flavus was studied for (L) and its metal complexes.

scholarly journals Synthesis, Characterization and Biological Activity Study of New Compounds Tetrazole Derivatives Azo-Schiff Base

2019 ◽  
Vol 25 (103) ◽  
pp. 68-89
Author(s):  
Hiba Ibrahim Abdulla AL-Joubory ◽  
Khalid Mohamad Motny Al-janaby
Keyword(s):  
Biological Activity ◽  
Schiff Base ◽  
Pathogenic Bacteria ◽  
Diazonium Salt ◽  
Aldehyde Group ◽  
Spectroscopic Techniques ◽  
Phenyl Hydrazine ◽  
Ft Ir ◽  
New Compounds ◽  
Tetrazole Derivatives

This work included synthesis of azo dye (H1) by the reaction of diazonium salt to sulfacetamide with 4-hydroxy benzaldehyde at (0-5) oC  and synthesis of schiff base (H2-H6) through reaction substituted aromatic amine (aniline, 4-nitro aniline, 4-chloro aniline, 4-amino benzoic acid and phenyl hydrazine)  with aldehyde group in azo compound (H1) in ethanol compounds (H2-H6) and tetrazole derivatives prepared by reaction schiff base with sodium azide in ethanol compounds (H7-H11) and characterization by using spectroscopic techniques Uv/Vis, FT-IR, C.H.N. and H1-NMR of some the prepared compounds using DMSO-d6 a solvent, in addition melting point and determination a purity of TLC, and this work consists a study of biological activity for the some prepared compounds against four types of pathogenic bacteria and know to be resistant to anti biotic.

scholarly journals Theoretical Study and Biological Activity of Co(II), Ni(II), Cu(II),Pd(II),Pt(IV) and Cd(II) Complexes with2-Thioxoimidazolidin-4-one Derivative

2018 ◽  
Vol 28 (2) ◽  
pp. 64
Author(s):  
Sallal A. H. Abdullah
Keyword(s):  
Metal Complexes ◽  
Gas Phase ◽  
Theoretical Study ◽  
Free Ligand ◽  
Heat Of Formation ◽  
Theoretical Treatment ◽  
Great Activity ◽  
Minimal Inhibitory Concen ◽  
Micro Organisms ◽  
New Compounds

The workcontains a theoretical treatment of the preparedligand(3-{[(Z)-(4-nitrophenyl) methyli -dene]amino}-2-thioxoimidazolidin-4-one)[L] and their metal complexes[S1-S6]in the gas phase. Hyperchem-8 program has been used to determined structural geometries of ligand and their met-al complexes. The electrostatic potential(Ep)of the ligand was calculated,furthermore binding en-ergy(ΔEb),the heat of formation(ΔHf),vibration spectra and bond length for the ligand and their metal co -mplexes were calculated by PM3methods at 298K°. The theoretically calculateddata were agreed with those found experimentally. The antibacterial activity for free ligand and its metal complexes(S1-S6)were studied against two selected micro-organisms [(Staphylococcusau-reus) as gram positive]and [(Escherichiacoli)as gram negative]. The minimal inhibitory concen-trations(MIC)have been also studied to determine the low concentration for inhibition. The anti-biotics (Amoxcillin and Ampicillin) have been chosen to compare their activity with those of the new compounds. Furthermore the antif -ungal activity against two microorganisms (Candidaalbi-cans) and (Aspergillusflavus) were studied for all compounds. The results showed great activity of the complexes relative to that of free ligand.

scholarly journals Synthesis and Spectroscopic Characterization for Some Metal ion Complexes with 2-Hydroxy-3-((5-Mercapto-1,3,4-Thiadiazol-2-yl)Diazenyl)-1-Naphthaldehyde

2016 ◽  
Vol 13 (2) ◽  
pp. 105-114
Author(s):  
Baghdad Science Journal
Keyword(s):  
Metal Complexes ◽  
Metal Ion ◽  
Mass Spectra ◽  
Spectroscopic Characterization ◽  
Bidentate Ligand ◽  
Molar Ratio ◽  
Theoretical Treatment ◽  
Spectroscopic Techniques ◽  
Metal Ion Complexes ◽  
Square Planar

New metal ion complexes were synthesized with the general formula; K[PtLCl4], [ReLCl4] and K[ML(Cl)2] where M = Pd(II), Cd(II), Zn(II) and Hg(II), from the Azo ligand (HL) [2-Hydroxy-3-((5-mercapto-1,3,4-thiadiazol-2-yl)diazenyl)-1-naphth aldehyde] (HL) the ligand was synthesized from (2-hydroxy-1-naphthaldehyde) and (5-amino-1,3,4-thiadiazole-2-thiol). The ligand and its metal complexes are characterized by phisco- chemical spectroscopic techniques (FT.IR, UV-Vis and Mass spectra, elemental analysis, molar conductivity, Atomic Absorption, Chloride contain and magnetic susceptibility). The spectral data suggest that the (HL) behaves as a bidentate ligand in all complexes. These studies revealed tetrahedral geometries for all metal complexes, except square planar for Pd(II) complex and except octahedral geometry for Pt(IV) and Re(V) complexes. The study of complexes formation via molar ratio of (M:L) as (1:1). Theoretical treatment of this ligand and its metal complexes in gas phase using Hyper chem.8 was preformed.

Catalytic Reduction Performance of Carboxylated Alginic Acid Derivatives

2021 ◽  
Author(s):  
Raed H. Althomali ◽  
Khalid A. Alamry ◽  
Mahmoud Hussein Abdo ◽  
Shams H. Abdel-Hafez
Keyword(s):  
Metal Complexes ◽  
Metal Ion ◽  
Alginic Acid ◽  
Catalytic Reduction ◽  
Organic Dyes ◽  
Reduction Process ◽  
Spectroscopic Techniques ◽  
Reduction Behavior ◽  
Long Time ◽  
Ft Ir

Abstract In this study, the catalytic reduction behavior of carboxylated alginic acid derivatives has been investigated against the harmful organic dyes including Methyl Orange (MO) and Congo Red (CR). Alginic acid was firstly oxidized through an easy addition of KMnO4 as an oxidizing agent. A carboxylated alginic acid (CAA) has been interacted with selected metal ions (Sn, Fe, Ni, and Zr) through coordination bonds at the value of pH = 4 to form the corresponding metal complexes namely: Sn-CAA, Fe-CAA, Ni-CAA and Zr-CAA. The consistency of the coordination was confirmed by several spectroscopic techniques including FT-IR, XRD, SEM, and EDX. The catalytic reduction of these metal ion-based products was carried out against MO and CR in the presence of NaBH4 as a reducing agent under UV irradiation. All catalysts based metal complexes showed enhanced catalytic reduction against CR compared to MO. Among all those mentioned metal complexes Sn-CAA showed the best catalytic reduction of these dyes. The time taken by the Sn-CAA for CR, and MO is 5 and 7min respectively. Ni-CAA was classified as the second efficient product against both dyes, where the reduction process took 20 and 9 min respectively. The other two catalysts took a long time for CR and MO reduction. Zr-CAA showed more than 80 % reduction of only CR dye within 20 min. Whereas, Fe-CAA did not show any significant sign of reduction against both the dyes after the same time. The order of higher catalytic reduction was illustrated as: Sn-CAA > Ni-CAA > Zr-CAA = Fe-CAA.

scholarly journals Biological Study of Transition Metal Complexes with Adenine Ligand

Proceedings ◽  
2019 ◽  
Vol 41 (1) ◽  
pp. 77 ◽  
Author(s):  
Hamad M. I. Hasan ◽  
Aaza I. Yahiya ◽  
Safaa S. Hassan ◽  
Mabrouk M. Salama
Keyword(s):  
Metal Complexes ◽  
Molar Conductance ◽  
Molar Ratio ◽  
Biological Study ◽  
Ratio Method ◽  
Spectroscopic Techniques ◽  
Stoichiometric Ratio ◽  
Metal Contents ◽  
Molar Ratio Method

Adenine complexes were prepared with some of the first series transition metals in a stoichiometric ratio of 1: 2 (Mn+: L), where Mn+ = Mn2+, Fe3+, Co2+, Ni2+, Cu2+, Zn2+, and Cd2+ ions. The Complexes were characterized by the physicochemical and spectroscopic techniques as electric conductivity, metal contents, IR, UV–Visible, and molar conductance techniques. The stoichiometric ratios of the synthesized complexes were confirmed by using molar ratio method. The dissociation constant of adenine ligand was determined spectrophotometrically. Solvent effect on the electronic spectra of the adenine ligand was examined using solvents with different polarities. The biological activity of adenine ligand and its metal complexes were tested in vitro against some selected species of fungi and bacteria. The results showed a satisfactory spectrum against the tested organisms.

scholarly journals Transition metal complexes of 5-bromosalicylidene-4-amino-3-mercapto-1,2,4-triazine-5-one: Synthesis, characterization, catalytic and antibacterial studies

2011 ◽  
Vol 76 (1) ◽  
pp. 75-83 ◽  
Author(s):  
A.S. Ramasubramanian ◽  
Ramachandra Bhat ◽  
Ramakrishna Dileep ◽  
Sandya Rani
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Pathogenic Bacteria ◽  
Magnetic Moments ◽  
Spectroscopic Techniques ◽  
Antibacterial Studies ◽  
Metal Precursors ◽  
Square Planar ◽  
Bactericidal Properties

Transition metal complexes of 5-bromosalicylidene-4-amino-3- mercapto-1,2,4-triazine-5-one with metal precursors, such as Cu(II), Ni(II), Co(II) and Pd(II), were synthesized and characterized by physicochemical and spectroscopic techniques. All the complexes are of the ML type. Based on analytical, spectral data and magnetic moments, the Co(II) and Ni(II) complexes were assigned octahedral geometries, while the Cu (II) and Pd(II) complexes square planar. A study on the catalytic oxidation of benzyl alcohol, cyclohexanol, cinnamyl alcohol, 2-propanol and 2- methyl-1-propanol was performed with N-methylmorpholine-N-oxide (NMO) and molecular oxygen as co-oxidants. All the complexes and their parent organic moiety were screened for their biological activity on several pathogenic bacteria and were found to possess appreciable bactericidal properties.

scholarly journals Synthesis, characterization, thermal, theoretical and antimicrobial studies of Schiff base ligand and its Co(II) and Cu(II) complexes

2020 ◽  
Vol 85 (2) ◽  
pp. 215-225 ◽  
Author(s):  
Palaniswamy Venkittapuram ◽  
Mahalakshmi Dhandapani ◽  
Jonekirubavathy Suyambulingam ◽  
Chitra Subramanian
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Schiff Base Ligand ◽  
Bacterial Species ◽  
Thermal Analyses ◽  
Fungal Species ◽  
Basis Sets ◽  
Chloride Salt ◽  
Antimicrobial Studies ◽  
Ft Ir

A Schiff base ligand L was synthesized by condensation of 1,2-diaminoethane with creatinine. The reaction of the ligand with metal chloride salt gives Co(II) and Cu(II) complexes. The synthesized ligand and its metal complexes were characterized by elemental analysis, FT-IR, NMR, UV?Vis, conductivity and magnetic susceptibility measurements as well as thermal analyses. Based on spectral data, tetrahedral geometries have been proposed for the Co(II) and Cu(II) complexes. The molar conductivity data show that the complexes are non-electrolytic in nature. In DFT studies, the geometry of the Schiff base ligand and its Co(II) and Cu(II) complexes were fully optimized using the B3LYP functional together with 6-31g(d,p) and LANL2DZ basis sets. The ligand and its metal complexes were tested against four bacterial species and two fungal species. The results revealed that the metal complexes are more potent against the microbes than the parent ligand.

scholarly journals Preparation, Spectroscopic Characterization and Theoretical Studies of Transition Metal Complexes with 1-[(2-(1H-indol-3-yl)ethylimino)methyl]naphthalene-2-ol Ligand

2019 ◽  
Vol 31 (11) ◽  
pp. 2430-2438 ◽  
Author(s):  
Vian Yamin Jirjees ◽  
Veyan Taher Suleman ◽  
Abbas Ali Salih Al-Hamdani ◽  
Suzan Duraid Ahmed
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Spectroscopic Characterization ◽  
Bidentate Ligand ◽  
Spectroscopic Techniques ◽  
Theoretical Studies ◽  
Ft Ir ◽  
Uv Visible ◽  
Methyl Naphthalene

A new Schiff base [1-((2-(1H-indol-3-yl)ethylimino)methyl)naphthalene-2-ol] (HL) has been synthesized by condensing (2-hydroxy-1-naphthaldehyde) with (2-(1H-indol-3-yl)ethylamine). In turn, its transition metal complexes were prepared having the general formula; [Pt(IV)Cl2(L)2], [Re(V)Cl2(L)2]Cl and [Pd(L)2], 2K[M(II)Cl2(L)2] where M(II) = Co, Ni, Cu] are reported. Ligand as well as metal complexes are characterized by spectroscopic techniques such as FT-IR, UV-visible, 13C & 1H NMR, mass, elemental analysis. The results suggested that the ligand behaves like a bidentate ligand for all the synthesized complexes. On the other hand, theoretical studies of the ligand as well its metal complexes were conducted at gas phase using HyperChem 8.0. These metal complexes exhibited good antibacterial activity.

Metal Complexes of π-Expanded Ligands (8): Cold Crystallization of bis[2-[(octylimino)methyl]-1-pyrenolato-N,O] copper(II) by Thermal Analyses, Magnetic Studies, and FT-IR

2021 ◽  
Vol 10 (2) ◽  
pp. 10-15
Author(s):  
Dien Luong Xuan
Keyword(s):  
Metal Complexes ◽  
Heat Storage ◽  
Alkyl Chain ◽  
Thermal Analyses ◽  
Cold Crystallization ◽  
Magnetic Studies ◽  
Heat Storage Materials ◽  
Ft Ir ◽  
Molecular Stacking ◽  
Long Alkyl Chain

Molecules exhibiting cold crystallization, an exothermic phenomenon in heating following supercooling, can be used as a heat-storing material. On the other hand, examples in non-polymers are still few. To test metal complexes as potential compounds for heat-storage materials, a salicylaldiminato-typed copper(II) complex, bis[2-[(octylimino)methyl]-1-pyrenolato-N,O] copper(II) 1(Cu), which had two different coloured forms and a characteristic long alkyl chain, exhibited complicated thermal behaviour including cold crystallization. The long alkyl chain was a steric barrier to molecular stacking, leading to the supercooled state. Besides, the two polymorphs were characterized by IR spectra studies and magnetic susceptibility.

scholarly journals Spectral Investigation andIn VitroAntibacterial Evaluation of NiIIand CuIIComplexes of Schiff Base Derived from Amoxicillin andα-Formylthiophene (αft)

2015 ◽  
Vol 2015 ◽  
pp. 1-12 ◽  
Author(s):  
Narendra Kumar Chaudhary ◽  
Parashuram Mishra
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Pathogenic Bacteria ◽  
Sensitivity Study ◽  
Molar Conductance ◽  
Planar Geometry ◽  
Field Calculation ◽  
Orthorhombic Crystal ◽  
Standard Drug ◽  
Ft Ir

Two new metal complexes of general formula M(Haαft)2[M =NiIIandCuII] of asymmetrical Schiff base ligand (HL = Haαft) derived from amoxicillin andα-formylthiophene have been prepared and characterized by various physicochemical and spectral techniques. Molar conductance measurement indicates nonelectrolytic nature of the metal complexes. FT-IR spectral study reveals the ligation of metal ions at two different nitrogen [NN] donor sites of Haαft. FT-IR and electronic absorption spectral evidences suggest distorted tetrahedral and square planar geometry forCuIIandNiIIcomplexes, respectively. The structure optimization by molecular mechanics (MM) force field calculation through ArgusLab 4.0.1 version software also supports the concerned geometry of the complexes. The cell dimensions as suggested by XRPD study,a(6.753 Å),b(13.904 Å),c(20.122 Å),α(142.76°),β(106.580°), andγ(72.4343°) forCuIIanda(24.2547 Å),b(6.6371 Å),c(5.5047 Å) (α=β=γ= 90°) forNiIIcomplexes, are in good agreement with their triclinic and orthorhombic crystal systems. Particle size calculation by Scherrer’s formula indicates nanocrystalline nature of the complexes. The antibacterial sensitivity study suggests promising activities of Haαft (Ligand) and M(Haαft)2complexes against four clinical pathogenic bacteria, namely,E. coli,P. vulgaris,P. aeruginosa, andS. aureus, though being less active than the standard drug amikacin.

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