0000000000744116

AUTHOR

Anna Irto

showing 6 related works from this author

Modeling the acid-base properties of molybdate(VI) in different ionic media, ionic strengths and temperatures, by EDH, SIT and Pitzer equations

2017

This paper reports the results of a study on the determination of the protonation constants of MoO42 −, in NaClaq, NaNO3aq, KClaq, at different ionic strengths (0 < I/mol dm− 3 ≤ 5.0 in NaClaq, 0 < I/mol dm− 3 ≤ 3.0 in NaNO3aq and KClaq) and temperatures (278.15 ≤ T/K ≤ 318.15 in NaClaq, only 298.15 K in NaNO3aq and KClaq), by potentiometric (ISE-H+ glass electrode) and spectrophotometric (UV/Vis) titrations. After a critical analysis of results and literature findings, the proposed speciation model takes into account the formation of two monomeric and four heptameric species, namely: MoO4H−, MoO4H2, (MoO4)7H86 −, (MoO4)7H95 −, (MoO4)7H104 − and (MoO4)7H113 −. Due to the complexity of…

Solid-state chemistryAtomic and Molecular Physics and OpticBase (chemistry)Thermodynamic parameterSpeciationInorganic chemistryThermodynamicsIonic bondingchemistry.chemical_elementProtonationProtonationCondensed Matter PhysicMolybdate010402 general chemistry01 natural scienceschemistry.chemical_compoundMolybdenum Protonation Thermodynamic parameters Aqueous solutions SpeciationMaterials ChemistryAqueous solutionPhysical and Theoretical ChemistrySpectroscopyMolybdenumchemistry.chemical_classificationAqueous solution010405 organic chemistryElectronic Optical and Magnetic MaterialCondensed Matter PhysicsAtomic and Molecular Physics and Optics0104 chemical sciencesElectronic Optical and Magnetic MaterialschemistryMolybdenumPitzer equationsJournal of Molecular Liquids
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Understanding the Solution Behavior of Epinephrine in the Presence of Toxic Cations: A Thermodynamic Investigation in Different Experimental Conditio…

2020

The interactions of epinephrine ((R)-(&minus

EnthalpyInorganic chemistryPharmaceutical ScienceIonic bondingProtonation02 engineering and technologyCalorimetry010402 general chemistry01 natural sciencesArticleAnalytical Chemistrylcsh:QD241-441chemistry.chemical_compoundlcsh:Organic chemistryDrug Discoverytoxic cationSettore CHIM/01 - Chimica Analiticatoxic cationsepinephrinePhysical and Theoretical ChemistryChemistryOrganic Chemistryenthalpy and entropy changesOxidesMethylmercury Compoundsdependence on ionic strength021001 nanoscience & nanotechnologysequestering ability0104 chemical sciencesSpecific ion interaction theoryChemistry (miscellaneous)Ionic strengthBenzyl alcoholThermodynamicsUraniumMolecular MedicineTitration0210 nano-technologyenthalpy and entropy changeMolecules
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The solution behavior of dopamine in the presence of mono and divalent cations: A thermodynamic investigation in different experimental conditions

2021

The interactions of dopamine [2-(3,4-Dihydroxyphenyl)ethylamine, (Dop-)] with methylmercury(II) (CH3Hg+), magnesium(II), calcium(II), and tin(II) were studied in NaCl(aq) at different ionic strengths and temperatures. Different speciation models were obtained, mainly characterized by mononuclear species. Only for Sn2+ we observed the formation of binuclear complexes (M2L2 and M2LOH (charge omitted for simplicity)

Models MolecularCations DivalentDopaminePotentiometric titrationEnthalpyIonic bondingBiochemistryMicrobiologyArticleDivalentchemistry.chemical_compoundMetal complexesTheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITYSettore CHIM/01 - Chimica AnaliticaStability constantsMolecular Biologychemistry.chemical_classificationCatechol; Chemical speciation; Metal complexes; Sequestration; Stability constantsLigandHydrolysisOsmolar ConcentrationTemperatureSequestrationHydrogen-Ion ConcentrationQR1-502SolutionsKineticschemistrySpecific ion interaction theoryIonic strengthThermogravimetryCatecholPhysical chemistryThermodynamicsChemical speciationEthylamine
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Speciation Studies of Bifunctional 3-Hydroxy-4-Pyridinone Ligands in the Presence of Zn2+ at Different Ionic Strengths and Temperatures

2019

The acid&ndash

acid–base properties3 hydroxy 4 pyridinonePharmaceutical ScienceIonic bondingProtonation02 engineering and technologyAnalytical Chemistry03 medical and health sciencessymbols.namesakechemistry.chemical_compoundacid base propertiesZn-complexationDrug Discoveryspecific ion interaction theorySettore CHIM/01 - Chimica AnaliticaPhysical and Theoretical ChemistryBifunctionalEquilibrium constant030304 developmental biologyVan 't Hoff equation0303 health sciencesLigandOrganic Chemistryextended Debye Hückel3-hydroxy-4-pyridinone3 hydroxy 4 pyridinone; speciation; acid base properties; extended Debye Hückel; Zn-complexation; specific ion interaction theory; van’t Hoff equation; sequestering ability021001 nanoscience & nanotechnologysequestering abilityextended Debye–Hückel3. Good healthvan’t Hoff equationSpecific ion interaction theorychemistryspeciationChemistry (miscellaneous)Ionic strengthsymbolsMolecular MedicinePhysical chemistry0210 nano-technologyacid–base propertie
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Modelling the dependence on medium and ionic strength of molybdate acidbase properties, and its interactions with phytate

2016

The importance of molybdenum from a biological, environmental and technological point of view is very well known since many decades [15]. In particular, it is mainly present in aqueous solutions as molybdate (MoO42), which is the biologically active form, entering in the cells by active transport systems. Though molybdate is the major species in neutral to basic pH conditions, at lower pH it undergoes protonation and, chiefly, polymerization, even at millimolar concentration levels [2]. Consequently, the modelling of its speciation and acidbase properties is not very simple, as demonstrated by the nonhomogeneity of available literature data. In this light, our group has started a systematic…

molybdatephytateSettore CHIM/01 - Chimica Analiticaacid-base propertieionic strengthionic medium
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The Effect of Metal Cations on the Aqueous Behavior of Dopamine. Thermodynamic Investigation of the Binary and Ternary Interactions with Cd2+, Cu2+ a…

2021

The interactions of dopamine [2-(3,4-Dihydroxyphenyl)ethylamine, (Dop−)] with cadmium(II), copper(II) and uranyl(VI) were studied in NaCl(aq) at different ionic strengths (0 ≤ I/mol dm−3 ≤ 1.0) and temperatures (288.15 ≤ T/K ≤ 318.15). From the elaboration of the experimental data, it was found that the speciation models are featured by species of different stoichiometry and stability. In particular for cadmium, the formation of only MLH, ML and ML2 (M = Cd2+; L = dopamine) species was obtained. For uranyl(VI) (UO22+), the speciation scheme is influenced by the use of UO2(acetate)2 salt as a chemical; in this case, the formation of ML2, MLOH and the ternary MLAc (Ac = acetate) species in a …

Catechol; Chemical speciation; Metal complexes; Sequestration; Stability constantsMolecular Structurechemical speciation; metal complexes; catechol; sequestration; stability constantsDopaminePharmaceutical ScienceOrganic chemistrysequestrationmetal complexesSodium Chloridecatecholchemical speciationUranium CompoundsAnalytical Chemistrystability constantsQD241-441Chemistry (miscellaneous)CationsDrug DiscoveryMolecular MedicineThermodynamicsSettore CHIM/01 - Chimica AnaliticaPhysical and Theoretical ChemistryCopperCadmiumMolecules
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