Use of spectroscopic technique to develop a reagent for Mo(VI) utilizing micellar effects on complex formation

et al. 2018

ACSi

The equilibria of the chelate formation and ion-association in the liquid-liquid extraction system Mo(VI)-3,5-DNC-INT-H 2 O-CHCl 3 were studied by spectrophotometry. The optimum conditions for the chelate formation and extraction of the ion-associated complex formed between the anionic chelate of Mo(VI)-3,5-dinitrocatechol (3,5-DNC) and the cation of 2-(4-iodophenyl)-3-(4-nitrophenyl)-5-phenyl-2H-tetrazolium chloride (INT) were established. The validity of Beer's law was checked and some analytical characteristics were calculated. The effect of various co-existing ions and reagents on the process of complex formation was investigated. The molar ratio of the components in the ternary ion-associated complex Mo(VI)-3,5-DNC-INT was determined by independent methods. The association process in aqueous phase and the extraction equilibria were investigated and quantitatively characterized. The following key constants of the processes were calculated: association constant, distribution constant, extraction constant and recovery factor. Based on this, a reaction scheme, a general formula and a structure of the complex were suggested.

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Section: Introductionmentioning

confidence: 99%

Study on the Chelate Formation and the Ion-association of Anionic Chelate of Molybdenum(VI) with 3,5-Dinitrocatechol and Monotetrazolium Cation

et al. 2018

ACSi

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“…1,5,6 Molybdenum(VI) forms complexes with various natural organic ligands, such as polyphenols and their functional derivatives, polyhydroxycarboxylic acids, aminopolycarboxylic acids, hydroxamic acids, amines (primary, secondary and tertiaty), 8-hydroxyquinoline and its derivatives, aldehyde hydrazones, oximes, β-diketones, fluorones, hydroxyazodyes, biomolecules (chitosan, chitin, D-glucosamine, L-alanine, L-phenylalanine). [7][8][9][10][11][12][13][14][15][16] Molybdenum(VI) gives colored chelates with aromatic compounds, containing two or more hydroxyl groups in o-position relative to each other. The colored anionic chelates of molybdenum(VI) form ion-associated complexes with bulky organic cations, like methyltrioctylammonium, cetylpyridinium, cetyltrimethylammonium, tetraphenylammonium.…”

Section: Introductionmentioning

confidence: 99%

Study on the Complex Equilibria of Molybdenum(VI) with 3,5-Dinitrocatechol and Ditetrazolium Salt

et al. 2016

ACSi

The complex formed between an anionic chelate of Mo(VI)-3,5-dinitrocatechol (3,5-DNC) with the cation of 3,3'-(3,3'-dimethoxy-4,4'-biphenylene)bis(2,5-diphenyl-2H-tetrazolium chloride) (Blue Tetrazolium Chloride, BTC) in the liquid-liquid extraction system Mo(VI)-3,5-DNC-BTC-H 2 O-CHCl 3 was studied. The optimum conditions for the complex formation and extraction of the ion-associated complex were established by spectrophotometry. The molar ratio of the reagents was determined by independent methods. The validity of Beer's law was checked and some analytical characteristics were calculated. The association process in aqueous phase and the extraction equilibria were investigated and quantitatively characterized. The following key constants of the processes were calculated: association constant, distribution constant, extraction constant and recovery factor. Based on this, a reaction scheme, a general formula and a structure of the complex were suggested.

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Study on the equilibria of the complex formation of molybdenum(VI) with 3,5-dinitrocatehol and 3-(2-naphthyl)-2,5-diphenyl-2H-tetrazolium chloride

et al. 2017

Russ. J. Inorg. Chem.