title: Molecular containers based on amphiphilic PS-b-PMVE dendrigraft copolymers: topology, organization, and aqueous solution properties.
abstract: The synthesis, characteristics, and properties of amphipatic, water-soluble dendrigrafts, with a polystyrene core and polystyrene-b-poly(methyl vinyl ether) (PS-b-PMVE) diblock as external branches, are described. The dendrigrafts are observed by AFM and TEM as egglike or long cylindrical objects which can self-organize intramolecularly in segregated subdomains forming flowerlike or strings of flowerlike objects. In organic solvents the dendrigrafts behave as fully soluble isolated macromolecules and show in water a low critical solubility temperature (LCST) at t > 30 degrees C. The ability of the amphiphilic PS-b-PMVE dendrigrafts to complex and transport in water organic (pyrene) and metallo-organic (manganese tetraphenyl porphyrin) molecules is investigated. The possibility to stabilize the high oxidation state of metallo-porphyrin complexes through their encapsulation into the dendrigraft is shown.
authors.affiliation: Laboratoire de Chimie des Polymères Organiques, UMR 5629 ENSCPB-CNRS, Université Bordeaux 1,16 avenue Pey Berland, 33607 Pessac Cedex, France.
authors.forename: Michel
authors.initials: M
authors.lastname: Schappacher
authors.forename: Jean Luc
authors.initials: JL
authors.lastname: Putaux
authors.forename: Christelle
authors.initials: C
authors.lastname: Lefebvre
authors.forename: Alain
authors.initials: A
authors.lastname: Deffieux