Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 48, Pages 17366-17376Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201603408
Keywords
dendrimers; fullerenes; liquid crystals; metathesis; self-assembly
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Funding
- Swiss National Science Foundation [200020-140298, 200020-152716]
- CNRS
- Swiss National Science Foundation (SNF) [200020_152716, 200020_140298] Funding Source: Swiss National Science Foundation (SNF)
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Bis-[60]fullerodendrimers were synthesized by assembling [60]fullerene-containing typeI (terminal olefin) and typeII (,-unsaturated carbonyl olefin) olefins through the olefin cross-metathesis reaction. The synthetic modular approach developed in this study allowed the preparation of mono-[60]fullerodendrimers and their [60]fullerene-free analogues. First- and second-generation poly(aryl ester) dendrons carrying cyanobiphenyl mesogens were used as liquid-crystalline promoters. The liquid-crystalline properties were studied by polarized optical microscopy, differential scanning calorimetry, and small-angle X-ray scattering. In agreement with the nature and structure of the dendrimers, nematic, smectic, and multisegregated lamellar phases were observed. Owing to its versatility and tolerance towards many functional groups, olefin cross-metathesis proved to be a reaction of choice for the elaboration of molecular materials with complex architectures.
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