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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

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  • Publication
    Accès libre
    Mesomorphic Poly(aryl ester)/Poly(benzyl ether) Dendrimers/co-Dendrimers with C60 as the Core
    (2009)
    Yevlampieva, Natalia
    ;
    Beljaev, Nikolai
    ;
    Lavrenko, Peter
    ;
    Deschenaux, Robert 
    Structure-properties relations of liquid crystalline fullerene-containing poly(aryl ester)/poly(benzyl ether) dendritic compounds with variation of C60 linkage type have been analyzed based on experimental data on their total polarity and electro–optical Kerr effect in benzene solutions. There was established that fulleropyrrolidine as the core of dendrimer strongly restricts rotational freedom of dendrons, in contrast to methanofullerene. A conclusion that not only terminal mesogenic groups and dendrons' generation number, but a manner of C60 incorporation into the dendritic matrix also influences on the mesomorphic behavior of these multicomponent hybrid-type liquid crystalline compounds had been made.
  • Publication
    Métadonnées seulement
    Novel Fullerene Containing Liquid Crystalline Dendrimers and Hemi-dendrimers: Synthesis and Characterization
    (2004)
    Deschenaux, Robert 
    ;
    Yevlampieva, Natalia
    ;
    Dmitrieva, Tatyana
    ;
    Dardel, Blaise
    ;
    Lavrenko, Peter
    Novel fullerene C60 contg. liq. cryst. dendrimers and hemi-dendrimers have been characterized by the method of electro-optical Kerr effect and detn. of the permanent dipole moment, sensitive to the mol. polar ordering and anisotropy of polarizability, and by hydrodynamic methods in soln. An influence of the covalently bonded fullerene on the polarity, electro-optical, and viscometric properties of fullerene derivs. have been detected, analyzed, and concluded that fullerene produces a change in the original ordering in dendritic mols., which mainly resulted in correction of the shape asymmetry of these mols. as a whole. [on SciFinder(R)]
  • 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)]