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Molecules. 2015 Feb 26;20(3):3783-90. doi: 10.3390/molecules20033783.

Inorganic mercury sequestration by a poly(ethylene imine) dendrimer in aqueous solution.

Author information

1
Instituto de Ciencia Molecular, C/Catedrático José Beltrán 2, 46980 Paterna, Valencia, Spain. elena.salvador@uv.es.
2
Department of Chemistry "Ugo Schiff", via della Lastruccia 3, 50019 Sesto Fiorentino, Italy. msavastano@unifi.it.
3
Department of Chemistry "Ugo Schiff", via della Lastruccia 3, 50019 Sesto Fiorentino, Italy. antonio.bianchi@unifi.it.

Abstract

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.

PMID:
25730387
DOI:
10.3390/molecules20033783
[Indexed for MEDLINE]
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