title: Playing with podands based on cone-shaped cavities. How can a cavity influence the properties of an appended metal centre?
abstract: The potential of molecules that combine the properties of a conical cavity with those of a covalently-linked transition-metal centre is highlighted through the assessment of cyclodextrin- and calixarene-derived podands ("cavitand" ligands) in coordination chemistry and catalysis. Metallocavitands with coordination sites directed towards the interior of the generic cavity provide interesting systems for studying host-guest complexation processes, their enhanced strength of metal-ion binding allowing for regioselective catalysis in a confined environment, and stabilisation of coordination complexes of unusual forms. Where cavitands have exo-oriented podand arms, the intrinsic dynamics of the cavity can dramatically modify metal chelation behaviour and the catalytic properties of the complexes. Such functionalised cavities are also useful as metal-ion transporters.
authors.affiliation: Laboratoire de Chimie Inorganique Moléculaire, Université Louis Pasteur, UMR 7513 CNRS, 1 rue Blaise Pascal, 67008, Strasbourg cedex.
authors.forename: Catherine
authors.initials: C
authors.lastname: Jeunesse
authors.forename: Dominique
authors.initials: D
authors.lastname: Armspach
authors.forename: Dominique
authors.initials: D
authors.lastname: Matt
mesh_terms: D047250:Calixarenes / Q000737:chemistry; D002614:Chelating Agents / Q000737:chemistry; D002712:Chlorides / Q000737:chemistry; D018360:Crystallography, X-Ray; D003505:Cyclodextrins / Q000737:chemistry; D005030:Ethylenes / Q000737:chemistry; D008024:Ligands; D008670:Metals / Q000737:chemistry*; D008958:Models, Molecular; D008968:Molecular Conformation; D010720:Phosphines / Q000737:chemistry
chemical_list: D002614:Chelating Agents; D002712:Chlorides; D003505:Cyclodextrins; D005030:Ethylenes; D008024:Ligands; D008670:Metals; D010720:Phosphines; D047250:Calixarenes; C036216:ethylene; C044646:phosphine