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

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Instituto de Ciencia Molecular, C/Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain
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Department of Chemistry "Ugo Schiff", via della Lastruccia 3, 50019 Sesto Fiorentino, Italy
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Author to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Molecules 2015, 20(3), 3783-3790; https://doi.org/10.3390/molecules20033783
Received: 26 January 2015 / Revised: 12 February 2015 / Accepted: 15 February 2015 / Published: 26 February 2015
The interaction of the G-2 poly(ethylene imine) dendrimer L, derived from ammonia as initiating core, with Hg(II) and HgCl42− 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. View Full-Text
Keywords: mercury; dendrimers; poly(ethylene imine); contamination; remediation mercury; dendrimers; poly(ethylene imine); contamination; remediation
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Serrano, E.S.; Savastano, M.; Bianchi, A. Inorganic Mercury Sequestration by a Poly(ethylene imine) Dendrimer in Aqueous Solution. Molecules 2015, 20, 3783-3790.

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