Université de Neuchâtel

Polar and Electrooptical Properties of [60]Fullerene-Containing Poly(benzyl ether) Dendrimers in Solution

Scanu, David ; Yevlampieva, Natalia P. ; Deschenaux, Robert

In: Macromolecules, 2007, vol. 40, no. 4, p. 1133–1139

[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...

Université de Neuchâtel

High-Resolution Characterization of Liquid-Crystalline [60]Fullerenes Using Solid-State Nuclear Magnetic Resonance Spectroscopy

Dvinskikh, Sergey V. ; Yamamoto, Kazutoshi ; Scanu, David ; Deschenaux, Robert ; Ramamoorthy, Ayyalusamy

In: Journal of the American Chemical Society (JACS), 2008, vol. 112, no. 39, p. 12347–12353

In situ attenuated total reflection infrared spectroscopy in a flow-through cell combined with online UV−vis spectroscopy was used to investigate the oxidation of 2-propanol over Pd/Al2O3 catalyst. The state of the catalyst was driven fast between reduced and oxidized by admitting alternately dissolved hydrogen and oxygen, and the response of the catalytic solid−liquid...

Université de Neuchâtel

Mesomorphic Hexabenzocoronenes Bearing Perfluorinated Chains

Alameddine, Bassam ; Aebischer, Olivier F. ; Amrein, Walter ; Donnio, Bertrand ; Deschenaux, Robert ; Guillon, Daniel ; Savary, Corinne ; Scanu, David ; Scheidegger, Oliver ; Titus A. , Jenny

In: Chemistry of Materials, 2005, vol. 17, no. 19, p. 4798–4807

Synthesis and characterization of new hexabenzocoronene (HBC) derivatives bearing perfluoroalkylated chains are described. These disc-shaped polycondensed aromatic hydrocarbons are known to self-assemble by π-stacking into columnar architectures. The peripheral decoration with perfluorinated chains, well-known for their low van der Waals forces, leads as expected to reduced intercolumnar...

Université de Neuchâtel

Photophysical, electrochemical, and mesomorphic properties of a liquid-crystalline [60]fullerene–peralkylated ferrocene dyad

Campidelli, Stéphane ; Séverac, Marjorie ; Scanu, David ; Deschenaux, Robert ; Vázquez, Ester ; Milic, Dragana ; Prato, Maurizio ; Carano, Maurizio ; Marcaccio, Massimo ; Paolucci, Francesco ; Rahman, G. M. Aminur ; Guldi, Dirk M.

In: Journal of Materials Chemistry, 2008, vol. 18, p. 1504-1509

Two fullerene–peralkylated ferrocene derivatives were synthesized: (1) a liquid-crystalline dyad (compound 1) was obtained by introduction of nonamethyl ferrocene into a liquid-crystalline fullerene derivative and (2) a reference compound (compound 2) was synthesized by attachment of nonamethyl ferrocene to a fulleropyrrolidine. The liquid-crystalline dyad displayed an enantiotropic smectic A...

Université de Neuchâtel

Conception de dyades liquides-cristallines ferrocène-fullerène

Scanu, David ; Deschenaux, Robert (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2006 ; 1873.

Depuis la découverte des cristaux liquides au XIXième siècle, leur intérêt n’a cessé de croître, menant à des applications toujours plus nombreuses. Très répandue dans la nature, l’architecture dendritique a permis de rendre mésomorphe l’objet anisotrope qu’est le fullerène, celui-ci, dont les propriétés photophysiques sont des plus enthousiasmantes, a souvent été lié à...