Liquid-crystalline methanofullerodendrimers which display columnar mesomorphism

被引：31

作者：

Maringa, Natacha ^{[2
]}

Lenoble, Julie ^{[2
]}

Donnio, Bertrand ^{[1
]}

Guillon, Daniel ^{[1
]}

Deschenaux, Robert ^{[2
]}

机构：

[1] Inst Phys & Chim Mat Strasbourg, Grp Mat Organ, F-67034 Strasbourg 2, France

[2] Univ Neuchatel, Inst Chim, CH-2009 Neuchatel, Switzerland

来源：

JOURNAL OF MATERIALS CHEMISTRY | 2008年 / 18卷 / 13期

关键词：

D O I：

10.1039/b717105f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Liquid-crystalline methanofullerodendrimers were synthesized via the Bingel addition reaction of mesomorphic malonate derivatives and C-60. 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.

引用

页码：1524 / 1534

页数：11

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