Vignette d'image

Deschenaux, Robert

Nom
Deschenaux, Robert
Affiliation principale
Fonction
Professeur.e ordinaire
Email
Robert.Deschenaux@unine.ch
Identifiants
https://libra.unine.ch/handle/123456789/384
_
0000-0002-1142-0022

Résultat de la recherche

Filtres

3
21
21
Réinitialiser les filtres

Paramètres

Voici les éléments 1 - 3 sur 3
  • Publication
    Accès libre
    Polar and Electrooptical Properties of [60]Fullerene-Containing Poly(benzyl ether) Dendrimers in Solution
    (2007)
    Scanu, David
    ;
    Yevlampieva, Natalia P.
    ;
    Deschenaux, Robert 
    [60]Fulleropyrrolidine-containing poly(benzyl ether) dendrimers 1−4 were synthesized via 1,3-dipolar cycloaddition of amino acid and aldehyde derivatives and [60]fullerene. Their dielectric and electrooptical (Kerr effect) solution properties were studied and compared with poly(propyleneimine) dendrimers, namely DAB-dendr-(alkyl chain)n and DAB-dendr-(CN)n, and with known symmetrical and non-symmetrical poly(benzyl ether) dendrimers carrying benzyl groups ([Gx]-[C]-[Gx]) or benzyl and cyanobenzyl groups (CNn-[Gx]-[C]-[Gx+1]), respectively. It was shown that 1−4 display similar polar and electrooptical characteristics independent of their dendrimer generation. This is in contrast to the reference dendrimers for which a strong dependence of total dipole moment on dendrimer generation was observed.
  • Publication
    Métadonnées seulement
    Electro-optical behavior of fullerene-containing liquid-crystalline dendrimers in solutions
    (: American Chemical Society, 2003)
    Yevlampieva, Natalia P.
    ;
    Lavrenko, Peter
    ;
    Dardel, Blaise
    ;
    Deschenaux, Robert 
    The synthesis of multifunctional materials performed by multicomponent single mols. of special chem. architecture is one of the modern trends in materials science. In the present work, malonate dendrimers have been used as matrix mols. for the synthesis of novel liq. cryst. (LC) materials with covalently linked fullerene C60 as addnl. functional component. Two purposes have been realized in the mol. design of novel LCs: 1) combination of typical mesogene compds. as the end groups with dendritic structure of the matrix mol., and 2) incorporation of fullerene to LC mols. Electrooptical Kerr effect and hydrodynamic methods have been utilized to study the dendritic samples with a variable fullerene position for examg. the influence of fullerene on the mol. properties of the original LC dendrimers. It was detected that substituted fullerene C60 reinforces the electrooptical effect of LC dendrimers and only slightly changes their size and mobility in soln. [on SciFinder(R)]
  • Publication
    Métadonnées seulement
    Electrooptical behavior of fullerene-containing liquid-crystalline dendrimers in solutions
    (2003)
    Yevlampieva, Natalia P.
    ;
    Dardel, Blaise
    ;
    Lavrenko, Peter
    ;
    Deschenaux, Robert 
    Mesomorphic fullerene derivs. of dendritic structure were studied in solns. by the method of electrooptical Kerr effect, hydrodynamic methods (translation diffusion and viscometry) and by the method of dielec. polarization of the solns. The influence of covalently bonded fullerene C60 on the polarity, electrooptical and hydrodynamic properties of fullerene contg. samples was obsd. in comparison with fullerene free analogs. The change of mol. form asymmetry for fullerene-contg. dendritic compds. was detected. Properties of the dendritic mols. depend on fullerene position in their structure and hemi-dendrimers are more sensitive to the incorporation of fullerene than dendrimers. [on SciFinder(R)]