title: Amphiphilic polyesters derived from silylated and germylated fatty compounds.
abstract: New classes of amphiphilic polyesters were prepared from metallated (Si, Ge) fatty methyl ester (FAME) precursors and poly(tetramethylene oxide) glycol. Hydrosilylation of 10-undecenoic methyl ester by tetramethyldisiloxane occurred at 80 degrees C in the presence of Karstedt's catalyst, and hydrogermylation of the same FAME derivative was obtained at the same temperature under radical AIBN initiation. These diester precursors, obtained in high yields (approximately 90%), reacted with poly(tetramethylene oxide) glycol under free solvent to give silicon polymers or germanium oligomers. These condensed materials display both the characteristic of organic-inorganic hybrid materials and those of amphiphilic polymers. The nature of organometallic fragment (hydrophobicity of tetramethyldisiloxy and sterical hindrance of diphenylgermyl) was shown to influence the chemical reactivity of the polymerizable monomers and the physical properties of the resulting copolymers. The amphiphilicity of these materials provides a driving force for the formation of small objects (approximately 1 nm), making them very attractive as hybrid nanocontainers.
authors.affiliation: Laboratoire d'Heterochimie Fondamentale et Appliquee, UMR-CNRS 5069, Universite Paul Sabatier, 118 Route de Narbonne, 31062 Toulouse cedex 9, France.
authors.forename: Nadia
authors.initials: N
authors.lastname: Katir
authors.forename: Abdelkrim
authors.initials: A
authors.lastname: El Kadib
authors.forename: Mohamed
authors.initials: M
authors.lastname: Dahrouch
authors.forename: Annie
authors.initials: A
authors.lastname: Castel
authors.forename: Nicolas
authors.initials: N
authors.lastname: Gatica
authors.forename: Zahra
authors.initials: Z
authors.lastname: Benmaarouf
authors.forename: Pierre
authors.initials: P
authors.lastname: Riviere
mesh_terms: D005231:Fatty Acids, Unsaturated / Q000737:chemistry; D005857:Germanium / Q000737:chemistry*; D006018:Glycols / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D011091:Polyesters / Q000138:chemical synthesis* / Q000737:chemistry*; D011108:Polymers / Q000138:chemical synthesis* / Q000737:chemistry*; D012833:Siloxanes / Q000737:chemistry*; D013501:Surface-Active Agents / Q000138:chemical synthesis* / Q000737:chemistry
chemical_list: D005231:Fatty Acids, Unsaturated; D006018:Glycols; D011091:Polyesters; D011108:Polymers; D012833:Siloxanes; D013501:Surface-Active Agents; D005857:Germanium; C047554:polytetramethylene glycol; C048289:10-undecynoic acid; C040516:germanium oxide