title: Selective and Efficient Removal of Mercury from Aqueous Media with the Highly Flexible Arms of a BioMOF.
abstract: A robust and water-stable metal-organic framework (MOF), featuring hexagonal channels decorated with methionine residues (1), selectively captures toxic species such as CH3 Hg(+) and Hg(2+) from water. 1 exhibits the largest Hg(2+) uptake capacity ever reported for a MOF, decreasing the [Hg(2+) ] and [CH3 Hg(+) ] concentrations in potable water from highly hazardous 10 ppm to the much safer values of 6 and 27 ppb, respectively. Just like with biological systems, the high-performance metal capture also involves a molecular recognition process. Both CH3 Hg(+) and Hg(2+) are efficiently immobilized by specific conformations adopted by the flexible thioether "claws" decorating the pores of 1. This leads to very stable structural conformations reminiscent of those responsible for the biological activity of the enzyme mercury reductase (MR).
authors.affiliation: Instituto de Ciencia Molecular (ICMOL), Universitat de València, Paterna, 46980, València, Spain.
authors.forename: Marta
authors.initials: M
authors.lastname: Mon
authors.affiliation: Instituto de Ciencia Molecular (ICMOL), Universitat de València, Paterna, 46980, València, Spain.
authors.forename: Francesc
authors.initials: F
authors.lastname: Lloret
authors.affiliation: Instituto de Ciencia Molecular (ICMOL), Universitat de València, Paterna, 46980, València, Spain. jesus.ferrando@uv.es.
authors.forename: Jesús
authors.initials: J
authors.lastname: Ferrando-Soria
authors.affiliation: Instituto de Ciencia Molecular (ICMOL), Universitat de València, Paterna, 46980, València, Spain.
authors.forename: Carlos
authors.initials: C
authors.lastname: Martí-Gastaldo
authors.affiliation: Dipartimento di Chimica e Tecnologie Chimiche (CTC), Università della Calabria, 87030, Rende, Cosenza, Italy. donatella.armentano@unical.it.
authors.forename: Donatella
authors.initials: D
authors.lastname: Armentano
authors.affiliation: Instituto de Ciencia Molecular (ICMOL), Universitat de València, Paterna, 46980, València, Spain. emilio.pardo@uv.es.
authors.forename: Emilio
authors.identifier: 0000-0002-1394-2553
authors.initials: E
authors.lastname: Pardo
keywords: bioMOFs; environmental chemistry; mercury; mercury reductase; metal-organic frameworks