title: Synthesis and properties of dendrimers possessing the same fluorophore(s) located either peripherally or off-center.
abstract: Two series of phosphorus dendrimers functionalized by maleimide derivatives are synthesized, as well as three new monomeric maleimide derivatives, of which two are characterized by X-ray diffraction. The first series of phosphorus dendrimers possesses maleimide derivatives as end groups (6-48, from generation 0 to generation 3). The second series of dendrimers possesses a single copy of the same maleimide derivative linked "off-center" to a cyclotriphosphazene core, leading to dissymmetrical dendrimers; this series is synthesized from generation 0 to generation 2. The fluorescence properties of both series of dendrimers and of monomers are studied, affording new information. First, the presence of labile hydrogen extinguishes the fluorescence. Second, the grafting of the fluorophore(s) directly to the core affords highly fluorescent compounds. Finally, an original influence of the branches possessing phosphorhydrazone linkages toward the fluorescence properties is shown.
authors.affiliation: Laboratoire de Chimie de Coordination du CNRS, 205 Route de Narbonne, 31077, Toulouse Cedex 4, France.
authors.forename: Grégory
authors.initials: G
authors.lastname: Franc
authors.forename: Serge
authors.initials: S
authors.lastname: Mazères
authors.forename: Cédric-Olivier
authors.initials: CO
authors.lastname: Turrin
authors.forename: Laure
authors.initials: L
authors.lastname: Vendier
authors.forename: Carine
authors.initials: C
authors.lastname: Duhayon
authors.forename: Anne-Marie
authors.initials: AM
authors.lastname: Caminade
authors.forename: Jean-Pierre
authors.initials: JP
authors.lastname: Majoral
mesh_terms: D018360:Crystallography, X-Ray; D050091:Dendrimers / Q000138:chemical synthesis* / Q000737:chemistry*; D005456:Fluorescent Dyes / Q000138:chemical synthesis* / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008301:Maleimides / Q000737:chemistry; D008958:Models, Molecular; D015394:Molecular Structure; D010777:Photochemistry; D013237:Stereoisomerism
chemical_list: D050091:Dendrimers; D005456:Fluorescent Dyes; D008301:Maleimides