Université de Neuchâtel

Synthesis and characterization of fullerene-pyridyl arene ruthenium complexes

Appavoo, Divambal ; Deschenaux, Robert ; Therrien, Bruno

In: Studia Universitatis Babes-Bolyai. Chemia, 2015, vol. 60, no. 4, p. 229-238

Association of [60]fullerene with arene ruthenium moieties has been achieved for the first time. Two fullerenopyrrolidine derivatives (Npyr-C60) were synthesized via a 1,3-dipolar cycloaddition, and coordinated to arene ruthenium complexes to form two half-sandwich complexes of the general formula...

Université de Fribourg

Self-assembly of rod-coil block copolymers for photovoltaic applications

Sary, Nicolas ; Rubatat, Laurent ; Brochon, Cyril ; Hadziioannou, Georges ; Mezzenga, Raffaele

In: Macromolecular Symposia, 2008, vol. 268, no. 1, p. 28-32

Two different approaches to obtain electron donor-acceptor interfaces via self-assembly of block copolymer systems are discussed, where the donor domains are formed by a π-conjugated rod-like polymer and the acceptor domains result from a coiled polymer modified by C₆₀ fullerenes. In the first strategy, C₆₀ is chemically grafted onto the coil polymer, typically a statistical...

Université de Neuchâtel

Columnar Phases from Covalent and Hydrogen-Bonded Liquid-Crystalline Ferrocene Derivatives

Deschenaux, Robert ; Monnet, Florence ; Serrano, Elisabeth ; Turpin, François ; Levelut, Anne-Marie

In: Helvetica Chimica Acta, 1998, vol. 81, no. 11, p. 2072-2077

The synthesis and liquid-crystalline properties of tetracatenar covalent and H-bonded bis-ferrocene derivatives 1 and 2, respectively, are reported. Both compounds gave rise to enantiotropic columnar liquid-crystalline behavior with a hexagonal molecular organization. To explore the possibility to obtain also calamitic liquid-crystalline phases from H-bonded ferrocene-containing liquid crystals,...

Université de Neuchâtel

Dendritic liquid-crystalline fullerene–ferrocene dyads

Campidelli, Stéphane ; Pérez, Laura ; Rodríguez-López Julián ; Barberá, Joaquín ; Langa, Fernando ; Deschenaux, Robert

In: Tetrahedron, 2006, vol. 62, no. 9, p. 2115-2122

First- and second-generation ferrocene-based dendrimers, fullerene and a second-generation liquid-crystalline poly(arylester) dendrimer carrying four cyanobiphenyl units were assembled to elaborate polyfunctional materials displaying mesomorphic and electronic properties. The targeted compounds gave rise to enantiotropic smectic A phases and organized into bilayer structures within the smectic...