Search results for " Potentiometric study"

showing 2 items of 2 documents

Equilibria involved in the diorganotin(IV) and triorganotin(IV) phosphomycin interaction in aqueous solution

2007

Four new diorganotin(IV), (R = Me, Bu), and triorganotin(IV), (R = Me, Ph), derivatives of the phosphomycin disodium salt antibiotic[(1R,2S)-1,2-epoxypropylphosphonate]Na2 have been synthesized and their solid state configuration studied by X-ray crystallography, FT-IR, Mossbauer, UV–Vis spectroscopies. The X-ray diffraction investigation, performed on the bis[trimethyltin(IV)]- phosphomycin, showed that the coordination geometry at all the Sn atoms is trigonal bipyramidal. The structure of the complex forms an unusual polymeric zig-zag planar network. The FT-IR and the 119Sn Mo¨ssbauer studies supported the formation of trigonal bipyramidal (Tbp) molecular structures, both in the diorganot…

chemistry.chemical_classificationAqueous solutionTrimethyltin(IV)LigandChemistryPotentiometric titrationInorganic chemistrySalt (chemistry)ISE-H+ potentiometric studyProtonationGeneral Chemistrydimethyltin(IV)Medicinal chemistryInorganic ChemistryFT-IRMossbauerX-rayOrganotinStability constants of complexesIonic strengthISE-H+ potentiometric study; UV–visible study; dimethyltin(IV); Trimethyltin(IV); phosphomycinUV–visible studyphosphomycinPotentiometric and spectrophotometric titrations
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On the Complexation of Cu(II) and Cd(II) With Polycarboxyl Ligands. Potentiometric Studies With ISE-H+, ISE-Cu2+, and ISE-Cd2+

2009

The interaction of Cu2+ and Cd2+ ions with polyacrylates (PAA, 2 kDa and 100 kDa), polymetacrylate(PMA, 5.4 kDa), and alginate (AA, 70 kDa to 100 kDa) was studied by potentiometry, using ISE-Cu2+, ISE-Cd2+, and ISE-H+ electrodes. The investigations were performed in NaNO3 aqueous solutions, in the ionic strength range 0.10 e I (mol ·L-1) e 0.75, at T ) 298.15 K. The “diprotic-like model” was used to explain the acid-base behavior of the polycarboxylates under investigation (for this model, the monomeric unit of the polyelectrolyte is considered as a dicarboxylate). The results give evidence for the formation of the ML species in all the systems investigated. In addition, the MLH species was…

inorganic chemicalsAcrylate polymerchemistry.chemical_classificationSequestering abilitypolycarboxylic acidsLigandGeneral Chemical EngineeringIonic strength dependencePotentiometric titrationInorganic chemistryGeneral ChemistryUronic acidComplexation Potentiometric study polyelectrolytesPolysaccharidePolyelectrolytechemistry.chemical_compoundchemistryIonic strengthSodium nitrateSettore CHIM/01 - Chimica Analiticapolycarboxylic acids; Sequestering ability; Ionic strength dependenceNuclear chemistryJournal of Chemical & Engineering Data
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