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Issue 13, 2008
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Liquid-crystalline methanofullerodendrimers which display columnar mesomorphism

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Abstract

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 non-symmetrical (two different dendrons) dendrimers were prepared, as well as hemidendrimers (only one dendron). The liquid-crystalline properties of the malonates and fullerodendrimers were investigated by polarized optical microscopy, differential scanning calorimetry, and X-ray diffraction. All the malonates give rise to hexagonal columnar phases of p6mm symmetry. As for the fullerodendrimers, the second-generation hemidendrimer shows a rectangular columnar phase of c2mm symmetry, while the other materials give rise to hexagonal columnar phases of p6mm symmetry.

Graphical abstract: Liquid-crystalline methanofullerodendrimers which display columnar mesomorphism

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Article information


Submitted
05 Nov 2007
Accepted
14 Jan 2008
First published
14 Feb 2008

J. Mater. Chem., 2008,18, 1524-1534
Article type
Paper

Liquid-crystalline methanofullerodendrimers which display columnar mesomorphism

N. Maringa, J. Lenoble, B. Donnio, D. Guillon and R. Deschenaux, J. Mater. Chem., 2008, 18, 1524
DOI: 10.1039/B717105F

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