scholarly journals Preparation, Characterization and Biological Evaluation of some Lanthanide (???) ions Complexes with 3-(1-methyl-2-benzimidazolylazo)-Tyrosine

2016 ◽  
Vol 13 (2) ◽  
pp. 128-142
Author(s):  
Baghdad Science Journal
Keyword(s):  
Metal Content ◽  
Magnetic Measurement ◽  
Biological Evaluation ◽  
Molar Absorptivity ◽  
Molar Conductance ◽  
Lanthanide Ions ◽  
Optimum Ph ◽  
Lanthanide Metal ◽  
Lanthanide Metal Complexes ◽  
Azo Ligand

A series of lanthanide metal (???) complexes have been prepared from the new azo ligand, 3-(1-methyl-2-benzimidazolylazo)-Tyrosine (MBT). The structural feature were confirmed on the basis of their elemental analysis, metal content, molar conductance, magnetic measurement, FTIR, 1 HNMR and UV-Vis spectra studies. The isolated complexes were found to have a mole ratio (1:2) (metal:ligand) stoichiometry with the general formula [Ln(MBT)2]Cl (Ln(???) = La, Ce, Pr, Nd, Sm, Eu and Gd). The chelates were found to have octahedral structures. The FTIR spectra shows that the ligand (MBT) is coordinated to lanthanide ions as a N, N, O-tridentate anion via benzimidazole nitrogen, azo nitrogen and oxygen of hydroxyl after deprotonation. Complexes formation in solution were performed after fixing the optimum pH, molar concentration and time. Beer's low was obeyed over a range (7-9x10-5) with high molar absorptivity for all the prepared complexes solutions. Stability Constant and Gibbis free energy were also determined. The ligand (MBT) and its prepared complexes were screened invitro against two types of selected bacteria.

Lanthanide metal–organic frameworks based on the 4,4′-oxybisbenzoic acid ligand: synthesis, structures and physical properties

2015 ◽  
Vol 39 (12) ◽  
pp. 9872-9878 ◽  
Author(s):  
Yun Li ◽  
Ning Wang ◽  
Yan-Ju Xiong ◽  
Qian Cheng ◽  
Jie-Fang Fang ◽  
...  
Keyword(s):  
Physical Properties ◽  
Solvothermal Synthesis ◽  
Metal Organic Frameworks ◽  
Lanthanide Ions ◽  
Acid Ligand ◽  
Metal Organic ◽  
Lanthanide Metal ◽  
Ligand Synthesis

Using solvothermal synthesis, eight new 3D microporous lanthanide-ions-based MOFs constructed from 4,4′-oxybisbenzoic acid were obtained and displayed two types of architecture.

scholarly journals New Complexes of Pr(III), Sm(III), Gd(lll), Gd(III), La(III) 1-(2-Benzthyazolyl)-3-methyl-4-azo-(4-nitrophenyl)-Pyrazolyn-5-one

1998 ◽  
Vol 6 (6) ◽  
pp. 53-62
Author(s):  
Anca Emandi ◽  
Mariana Balasoiu ◽  
Tudor Rosu
Keyword(s):  
Molecular Weight ◽  
Molar Conductance ◽  
Lanthanide Ions ◽  
X Ray ◽  
Visible Spectra ◽  
Elemental Analyses ◽  
Trivalent Lanthanide

1-(2-Benzthyazolyl)-3-methyl-4-azo-(4-nitrophenyl)-Pyrazolyn-5-one (HL) possesses a chelating behavior. Its chelates with a number of trivalent lanthanide ions Pr(III), Sm(III),Gd(III), Ho(III), La(III) of the type Na3[Ln(L)2(OH)4] have been isolated and characterized on the basis of their elemental analyses, IR and visible spectra, magnetic and molar conductance studies, thermal and X-ray analysis and molecular weight determinations. All chelates have a monomeric octa-coordinated stn1cture and square antiprismatic (C2) symmetry.

scholarly journals Extraction-Chromogenic System for Cobalt Based on 5-Methyl-4-(2-thiazolylazo) Resorcinol and Benzalkonium Chloride

2021 ◽  
Vol 68 (1) ◽  
pp. 37-43
Author(s):  
Danail G. Georgiev Hristov ◽  
Petya Vassileva Racheva ◽  
Galya Konstantinova Toncheva ◽  
Kiril Blazhev Gavazov
Keyword(s):  
Benzalkonium Chloride ◽  
Limit Of Detection ◽  
Ion Association ◽  
Molar Absorptivity ◽  
Sensitivity Limit ◽  
Deprotonated Form ◽  
Limit Of Quantification ◽  
Optimum Ph ◽  
Ion Associate ◽  
Ph Range

The interaction between CoII and 5-methyl-4-(2-thiazolylazo)-resorcinol (MTAR) was studied in a water-chloroform system, in the presence or absence of benzalkonium chloride (BZC) as a cationic ion-association reagent. The optimum pH, concentration of the reagents and extraction time for the extraction of Co were found. In the presence of BZC, the extracted ion-associate could be represented by the formula (BZ+)[CoIII(MTAR2–)2], where MTAR is in its deprotonated form. The following extraction-spectrophotometric characteristics were determined: absorption maximum, molar absorptivity, Sandell’s sensitivity, limit of detection, limit of quantification, constant of extraction, distribution ratio and fraction extracted. In the absence of BZC, the extraction is incomplete and occurs in a narrow pH range. The extracted chelate contains one deprotonated and one monoprotonated ligand: [CoIII(MTAR2–)(HMTAR–)].

scholarly journals Synthesis and characterization of new complexes of Co+2 , Ni+2 , Cu+2 and Zn+2 with (Sodium acetate thio ) ethylene ligands

2013 ◽  
Vol 10 (3) ◽  
pp. 650-657
Author(s):  
Baghdad Science Journal
Keyword(s):  
Content Analysis ◽  
General Formula ◽  
Metal Content ◽  
Sodium Acetate ◽  
Magnetic Measurement ◽  
Synthesis And Characterization ◽  
Square Planar ◽  
Square Planar Complexes ◽  
Uv Visible

This research involves the preparation of new ligands 1,1,2,2- tetrakis (sodium acetate thio)ethylene(L1) and 1,1,2- tris(sodiumacetatethio) ethylene(L2), through the reaction of disodium thioglycolate) with tetra chloro ethylene or tri chloro ethylene in (1:4) or (1:3) moler ratio . Homodinucliar complexes of general formlu [M2(L1)] and [M2(L2)ClH2O] , when M= Co(II), Ni(II), Cu (II) and Zn(II) also mono nuclear complexes of general formula [M(L2)] . The prepared complexes were characterized using spectral method (UV/Visible/ IR) , metal content analysis , magnetic and atomic measurements . The spectral and magnetic measurement indicats that some complexes have tetrahedral or square planar complexes environtment .

scholarly journals Synthesis, Characterization and Biological Evaluation of Cr(III), Fe(III), Co(II), Ni(II), Zn(II) and Cd(II) Complexes Using an Azo Dye as Ligand

2020 ◽  
Vol 71 (6) ◽  
pp. 1-8
Author(s):  
Rana Abdulilah Abbas ◽  
Afnan E. Abd-Almonuim ◽  
Amer J. Jarad ◽  
Szidonia-Katalin Tanczos ◽  
Paul Constantin
Keyword(s):  
Magnetic Susceptibility ◽  
Carboxylic Acid ◽  
Atomic Absorption ◽  
Elemental Analysis ◽  
Azo Dye ◽  
Biological Evaluation ◽  
Octahedral Geometry ◽  
Spectroscopic Methods ◽  
Ft Ir ◽  
Azo Ligand

Azo ligand 11-(4-methoxyphenyl azo)-6-oxo-5,6-dihydro-benzo[4,5] imidazo[1,2-c] quinazoline-9-carboixylic acid was derived from 4-methoxyaniline and 6-oxo-5,6-dihydro-benzo[4,5]imidazo[1,2-c]quinazoline-9-carboxylic acid. The presence of azo dye was identified by elemental analysis and spectroscopic methods (FT-IR and UV-Vis). The compounds formed have been identified by using atomic absorption in flame, FT.IR, UV-Vis spectrometry magnetic susceptibility and conductivity. In order to evaluate the antibacterial efficiency of ligand and its complexes used in this study three species of bacteria were also examined. Ligand and its complexes showed good bacterial efficiencies. From the obtained data, an octahedral geometry was proposed for all prepared complexes.

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