scholarly journals Uniform random colored complexes

2019 ◽  
Vol 55 (3) ◽  
pp. 615-648 ◽  
Author(s):  
Ariane Carrance
Keyword(s):  
Colored Complexes

scholarly journals New Mixed Ligand Cobalt(II), Nickel(II) and Copper(II) Complexes of 2,2'-Bipyridine-3,3'-Dicarboxylic acid (bpdc) with 2-Mercapto-5-Phenyl-1,3,4-Oxadiazole (phozSH) and Their Antioxidant activity

2020 ◽  
Vol 36 (05) ◽  
pp. 834-842
Author(s):  
Rezan Ali Saleh ◽  
Hikmat Ali Mohammad ◽  
Salim Najm Aldin Saber
Keyword(s):  
Antioxidant Activity ◽  
Metal Ions ◽  
Dicarboxylic Acid ◽  
Potassium Hydroxide ◽  
Electronic Spectroscopy ◽  
Conductivity Measurement ◽  
Mixed Ligand ◽  
Methanol Solution ◽  
Dpph Method ◽  
Colored Complexes

The mixing of one mole of 2,2'-bipyridine-3,3'-dicarboxylic acid (bpdc) with two mole of potassium hydroxide (KOH) in methanol were refluxed for (half hour), followed by addition of one mole methanol solution of MCl2.nH2O (where M=Co, Ni or Cu). The mixture was refluxed for (2 hours) to give colored complexes of the metal ions of [M(bpdc)(H2O)4]. The [M(bpdc)(H2O)4] were reacted with one mole of 2-Mercapto-5-phenyl-1,3,4-oxadiazole (phozSH) producing the colored mixed ligand complexes with general formula [M(bpdc)(phozSH)(H2O)3] in which the metal ions coordinated to the ligand through O-atoms of carboxyl group in (bpdc) and N-atom of (phozSH) ligand. The ligands and complexes are well identified by using Furrier transform infrared spectroscopy, 1H-NMR, 13C-NMR, Electronic spectroscopy, CHNS analysis, Melting point, conductivity measurement. The Antioxidant activity were screened for all the complexes by the use of 2, 2-diphenyl-1-picrylhydrazyl (DPPH) method.

One-pot synthesis of the new Hydroxamic acid and its complexes with metals

2022 ◽  
Vol 19 ◽  
Author(s):  
Gulu Abbasova ◽  
Ajdar Medjidov
Keyword(s):  
Nmr Spectroscopy ◽  
Thermogravimetric Analysis ◽  
Hydroxamic Acid ◽  
Uv Spectroscopy ◽  
Molar Ratio ◽  
One Pot ◽  
Ethanol Medium ◽  
Physicochemical Methods ◽  
Colored Complexes ◽  
First Time

Abstract: A one-pot conversion of 2-hydroxy-1-naphthoic aldehyde to hydroxamic acid was described. An efficient photoorganocatalytic method of synthesis was developed. The obtained hydroxamic acid was identified by various physicochemical methods such as IR, UV- and NMR-spectroscopy. Solid colored complexes of copper (II) and iron (II), respectively, green and brown colours with the obtained hydroxamic acid were synthesized in ethanol medium for the first time. The molar ratio of ligand and metal in the complex was 2:1. Their structures were established using IR, UV- spectroscopy and thermogravimetric analysis.

Automated Determination of Free Amino Groups in Serum and Plasma Using 2,4,6-Trinitrobenzene Sulfonate

1969 ◽  
Vol 15 (9) ◽  
pp. 891-901 ◽  
Author(s):  
D W Palmer ◽  
T Peters
Keyword(s):  
Amino Acids ◽  
Free Amino Acids ◽  
Free Amino ◽  
Clinical Applications ◽  
Amino Groups ◽  
Automated Method ◽  
Total Free Amino Acids ◽  
Colored Complexes ◽  
Automated Determination

Abstract A simple automated method is described for determining the level of total free amino acids in the blood. The method utilizes the AutoAnalyzer, and is based on the formation of colored complexes by uniting free amino groups with 2,4,6-trinitrobenzene sulfonate (TNBS). Proteins do not interfere because the free amino acids are first separated by dialysis. Characteristics of the reaction and potential clinical applications of the procedure are discussed.

scholarly journals Spectrophotometric and Conductometric Determination of Clomiphene Citrate and Nefazodone HCl

2008 ◽  
Vol 5 (s2) ◽  
pp. 1069-1080 ◽  
Author(s):  
Wafaa S. Hassan ◽  
Mervat M. Hosny
Keyword(s):  
Spectrophotometric Method ◽  
Clomiphene Citrate ◽  
Pharmaceutical Preparations ◽  
Conductometric Titration ◽  
Ion Pair ◽  
Experimental Conditions ◽  
Relative Standard ◽  
Colored Complexes ◽  
Standard Deviations

Two accurate, rapid and simple spectrophotometric and conductometric methods were developed for the determination of clomiphene citrate (CMP) and nefazodone HCl (NFZ), the proposed methods depends upon the reaction of ammonium reineckate with the two studied drugs to form stable precipitate of ion-pair complexes, which was dissolved in suitable solvent. The pink colored complexes were determined colorimetrically at 509, 523.6 nm, respectively. Using the conductometric titration, the studied drugs could be evaluated in 50% (v/v) acetone in the range 60.02-540.18 and 63.3-443.1 μg mL-1for clomiphene citrate and nefazodone HCl, respectively. While for spectrophotometric method the ranges were 0.2-1.8 and 0.2-1.6 mg mL-1for clomiphene citrate and nefazodone HCl respectively. Various experimental conditions were studied. The results obtained showed good recoveries with relative standard deviations of 0.759 and 0.552%. The proposed procedures were applied successfully to the analysis of these drugs in their pharmaceutical preparations and the results were favourably comparable with the official and reference methods. The molar combining ratio reveal that (1:1) (drug : reagent) ion associates were formed.

Extraction of colored complexes with Amberlite XAD-2

1976 ◽  
Vol 48 (1) ◽  
pp. 59-62 ◽  
Author(s):  
Raymond B. Willis ◽  
Darrel. Sangster
Keyword(s):  
Colored Complexes

Deferoxamine–paper for iron(III) and vanadium(V) sensing

2015 ◽  
Vol 69 (8) ◽  
Author(s):  
Giancarla Alberti ◽  
Federico Quattrini ◽  
Roberta Colleoni ◽  
Valeria M. Nurchi ◽  
Raffaela Biesuz
Keyword(s):  
Solid Phase ◽  
Solid Support ◽  
Complete Characterization ◽  
Good Sensitivity ◽  
Real Samples ◽  
Colorimetric Measurements ◽  
Colored Complexes ◽  
Pre Treatment ◽  
Treatment Procedures

AbstractThe development of a sensor based on the functionalization of common filter paper with deferoxamine (DFO) is proposed with the prospect to produce a solid phase for iron(III) and vanadium(V) sensing. The main features of this sensor are the simplicity of operation, good sensitivity and feasible applicability to real samples without the need of pre-treatment procedures. DFO was selected not only for it is easily anchored to the solid support, but also because it forms colored complexes with iron(III) and vanadium(V); hence, the developing of a simple colorimetric sensor can be considered. In particular, an innovative and economic way to perform colorimetric measurements using a desktop scanner is described. A complete characterization of the functionalized material is also reported.

scholarly journals Synthesis and Anticancer Activity of Mixed Ligand, Cobalt (II), Nickel (II), Manganese (II) Complexes of Tertiary Diphosphines with Dithizone (H2dz)

2018 ◽  
Vol 34 (4) ◽  
pp. 1919-1925 ◽  
Author(s):  
Hikmat Ali Mohamad
Keyword(s):  
Cancer Cell Line ◽  
Molar Conductance ◽  
Human Breast Cancer Cell ◽  
Mixed Ligand ◽  
Human Breast ◽  
Anticancer Activities ◽  
One Pot ◽  
Vis Spectroscopy ◽  
Colored Complexes ◽  
The One

The one-pot synthesis reaction of one mole MCl2.nH2O, where M= Co(II), Ni(II), Mn(II) ,with one mole of 1,5-diphenylthiocarbazone (dithizone;H2dz), of 1,1-bis(diphenyl phosphine)ferrocene (dppf) and 1,2-bis(diphenyl phosphine) ethane (dppe) gave colored complexes of; [Co(Hdz)(k2-dppf)]Cl, [Ni(Hdz)(k2-dppf)]Cl, [Ni(Hdz)(k2-dppe)]Cl and [Mn(Hdz)(k2-dppf)]Cl. The synthesized complexes have been identified by using 1HNMR, IR, UV-Vis spectroscopy, micro elemental analysis and molar conductance. All complexes were tested for their anticancer activities on Human breast cancer cell line CAL5. The results showed that [Ni(Hdz)(k2-dppe)]Cl and[Mn(Hdz)(k2-dppf)]Cl have a highest activities than cisplatin in compared to; [Co(Hdz)(k2-dppf)]Cl, [Ni(Hdz)(k2-dppf)]Cl.

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