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

Mesomorphic Metallo-Dendrimers Based on the Metal−Metal Bonded Ru2(CO)4 Sawhorse Unit

Frein, Stéphane ; Auzias, Mathieu ; Sondenecker, Aline ; Vieille-Petit, Ludovic ; Guintchin, Boris ; Maringa, Natacha ; Süss-Fink, Georg ; Barberá, Joaquín ; Deschenaux, Robert

In: Chemistry of Materials, 2008, vol. 20, no. 4, p. 1340-1343

Dinuclear ruthenium complexes containing the stable metal−metal bonded Ru2(CO)4 sawhorse unit with two dendritic carboxylato bridges have been synthesized and characterized. All complexes Ru2(CO)4(O2CR)2L2 (R = R1, R2, R3) containing cyanobiphenyl-based poly(arylester) dendrons of first...

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

Dendrimères liquides-cristallins du fullerène : contrôle de l'organisation supramoléculaire dans les phases colonnaires et chirales

Maringa, Natacha ; Deschenaux, Robert (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2006 ; 1870.

u cours de cette thèse, nous nous sommes intéressés à la synthèse de nouveaux matériaux dendritiques mésomorphes contenant du fullerène, et avons étudié leurs propriétés liquides-cristallines, ainsi que leur organisation supramoléculaire. Ce travail est divisé en trois parties : Dans la première partie, nous avons décrit la synthèse de méthanofullerènes qui développent des...