Lanthanide selective sorbents: self-assembled monolayers on mesoporous supports (SAMMS)

• Published in: Journal of materials chemistry Vol. 14; no. 22; pp. 3356 - 3363
• Main Authors: FRYXELL, Glen E, HONG WU, YUEHE LIN, SHAW, Wendy J, BIRNBAUM, Jerome C, LINEHAN, John C, ZIMIN NIE, KEMNER, Ken, KELLY, Shelly
• Format: Journal Article
• Language: English
• Published: Cambridge Royal Society of Chemistry 01.01.2004
• Subjects: ADSORBENTS; CERAMICS; COATINGS; Cross-disciplinary physics: materials science; rheology; Environmental Molecular Sciences Laboratory; Exact sciences and technology; INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; KINETICS; LEWIS BASES; Materials science; Physics; RARE EARTHS; REGENERATION; SURFACE AREA; SYNTHESIS; Ultrathin films; Porous materials; Self-assembled layers; Ceramic coating; Mesoporosity; Synthesis; Rare earths; Monolayers; Ligand field; Ligands; Kinetics; Surface area; Pairing
• ISSN: 0959-9428; 1364-5501
• DOI: 10.1039/b408181a

Through the marriage of mesoporous ceramics with self-assembled monolayer chemistry, the genesis of a powerful new class of environmental sorbent materials has been realised. By coating the mesoporous ceramic backbone with a monolayer terminated with a lanthanide-selective ligand, it is possible to couple high lanthanide binding affinity with the high loading capacity (resulting from the extremely high surface area of the support). This lanthanide-selective ligand field is created by pairing a "hard" anionic Lewis base with a suitable synergistic ligand, in a favourable chelating geometry. Details of the synthesis, characterisation, lanthanide binding studies, binding kinetics, competition experiments and sorbent regeneration studies are summarised. 47 refs.