6533b82efe1ef96bd1293361

RESEARCH PRODUCT

Inorganic Mercury Sequestration by a Poly(ethylene imine) Dendrimer in Aqueous Solution

Matteo SavastanoAntonio BianchiElena Salvador Serrano

subject

mercuryImineInorganic chemistryPotentiometric titrationPharmaceutical Sciencechemistry.chemical_elementProtonationmercury dendrimers sequestration water contamination environmentArticleAnalytical Chemistrydendrimerspoly(ethylene imine)Metallcsh:QD241-441chemistry.chemical_compoundAmmoniacontaminationlcsh:Organic chemistryDendrimerDrug DiscoveryremediationPhysical and Theoretical ChemistryAqueous solutionMolecular StructureOrganic ChemistryMercury (element)chemistryChemistry (miscellaneous)visual_artPotentiometryvisual_art.visual_art_mediumMolecular MedicineEnvironmental PollutantsIminesPolyethylenes

description

The interaction of the G-2 poly(ethylene imine) dendrimer L, derived from ammonia as initiating core, with Hg(II) and HgCl4 2− was studied in aqueous solution by means of potentiometric (pH-metric) measurements. Speciation of these complex systems showed that L is able to form a wide variety of complexes including 1:1, 2:1, 3:1 and 3:2 metal-to-ligand species, of different protonation states, as well as the anion complexes ((H7L)HgCl4) 5+ and ((H8L)HgCl4) 6+ . The stability of the metal complexes is very high, making L an excellent sequestering agent for Hg(II), over a large pH range, and a promising ligand for the preparation of functionalized activated carbons to be employed in the remediation and the prevention of environmental problems.

10.3390/molecules20033783http://www.mdpi.com/1420-3049/20/3/3783