Université de Neuchâtel

Supramolecular Fullerene Materials: Dendritic Liquid-Crystalline Fulleropyrrolidines

Campidelli, Stéphane ; Lenoble, Julie ; Barberá, Joaquín ; Paolucci, Francesco ; Marcaccio, Massimo ; Paolucci, Demis ; Deschenaux, Robert

In: Macromolecules, 2005, vol. 38, no. 19, p. 7915–7925

[60]Fullerene-containing liquid-crystalline dendrimers were synthesized from the first to the fourth generation by applying the 1,3-dipolar cycloaddition reaction from a mesomorphic dendritic-type aldehyde derivative, sarcosine (N-methylglycine) or glycine and C60. The cyanobiphenyl unit was used as a liquid-crystalline promoter. With the exception of the first-generation...

Université de Neuchâtel

Liquid-Crystalline Bisadducts of [60]Fullerene

Campidelli, Stéphane ; Vázquez, Ester ; Milic, Dragana ; Lenoble, Julie ; Atienza Castellanos, Carmen ; Sarova, Ginka ; Guldi, Dirk M. ; Deschenaux, Robert ; Prato, Maurizio

In: The Journal of Organic Chemistry (JOC), 2006, vol. 71, no. 20, p. 7603–7610

A second-generation cyanobiphenyl-based dendrimer was used as a liquid-crystalline promoter to synthesize mesomorphic bisadducts of [60]fullerene. Liquid-crystalline trans-2, trans-3, and equatorial bisadducts were obtained by condensation of the liquid-crystalline promoter, which carries a carboxylic acid function, with the corresponding bisaminofullerene derivatives. A monoadduct...

Université de Neuchâtel

Liquid−Crystalline Janus-Type Fullerodendrimers Displaying Tunable Smectic−Columnar Mesomorphism

Lenoble, Julie ; Campidelli, Stéphane ; Maringa, Natacha ; Donnio, Bertrand ; Guillon, Daniel ; Yevlampieva, Natalia ; Deschenaux, Robert

In: Journal of the American Chemical Society (JACS), 2007, vol. 129, no. 32, p. 9941–9952

Janus-type liquid−crystalline fullerodendrimers were synthesized via the 1,3-dipolar cycloaddtition of two mesomorphic dendrons and C60. By assembling poly(aryl ester) dendrons functionalized with cyanobiphenyl groups, displaying lamellar mesomorphism, with poly(benzyl ether) dendrons carrying alkyl chains, which display columnar mesomorphism, we could tailor by design the...

Université de Neuchâtel

Liquid-Crystalline Fullerodendrimers which Display Columnar Phases

Lenoble, Julie ; Maringa, Natacha ; Campidelli, Stéphane ; Donnio, Bertrand ; Guillon, Daniel ; Deschenaux, Robert

In: Organic Letters, 2006, vol. 8, no. 9, p. 1851–1854

The title compounds were synthesized by applying the 1,3-dipolar cycloaddition reaction of aldehyde-based poly(benzyl ether) dendrimers and sarcosine (N-methylglycine) to [60]fullerene (C60). The dendritic building blocks used to functionalize C60 displayed cubic and hexagonal columnar phases. The fullerene derivatives showed rectangular columnar phases of c2mm...

Université de Neuchâtel

[60]Fullerene-based liquid crystals acting as acid-sensitive fluorescent probes

Pérez, Laura ; Lenoble, Julie ; Barberá, Joaquín ; de la Cruz, Pilar ; Deschenaux, Robert ; Langa, Fernando

In: Chemical Communications (ChemComm), 2008, vol. 38, p. 4590-4592

Functionalization of [60]fullerene with liquid-crystalline dendrimers and a dibutylaniline-based phenylenevinylene moiety leads to supramolecular materials, the fluorescence of which responds to acid–base stimuli.

Université de Neuchâtel

Liquid-crystalline methanofullerodendrimers which display columnar mesomorphism

Maringa, Natacha ; Lenoble, Julie ; Donnio, Bertrand ; Guillon, Daniel ; Deschenaux, Robert

In: Journal of Materials Chemistry, 2008, vol. 18, p. 1524-1534

Liquid-crystalline methanofullerodendrimers were synthesized via the Bingel addition reaction of mesomorphic malonate derivatives and C60. Second- and third-generation poly(benzyl ether) dendrons were selected as liquid-crystalline promoters to induce columnar mesomorphism. Based on a convergent and modular synthetic methodology, symmetrical (two identical dendrons) and...

Université de Neuchâtel

Organisation supramoléculaire de fullérodendrimères liquides-cristallins en phases colonnaires et application aux dyades fullerène-oligophénylènevinylène pour la conception de cellules photovoltaïques organiques

Lenoble, Julie ; Deschenaux, Robert (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2007 ; 1922.

Ce travail de thèse présente la synthèse et l’étude des propriétés liquides-cristallines thermotropes de différents fullérodendrimères et fulléro-codendrimères présentant des phases colonnaires. L’influence de différents facteurs sur l’organisation supramoléculaire est étudiée et l’application de ces connaissances à la synthèse de dyades fullerène –...