Fullerene‐Containing Liquid Crystals

Supramolecular Purification and Regioselective Functionalization of Fullerenes and Endohedral Metallofullerenes

“…136 Photonic Liquid Crystals Fullerene-based liquid crystals with highly ordered columnar assemblies of the fullerene units are interesting materials for organic electronics and, especially, photovoltaic applications if oriented at surfaces. 137 In most of the work reported so far, only C 60 has been used and the strong influence of the degree of substitution of C 60 on the liquid-crystalline properties has been demonstrated. For instance, the Bingel-Hirsch cyclopropanated hexakis-adduct using a malonate bearing long aliphatic tails formed a smectic A phase from 80 C to 133 C, while the corresponding mono-adduct did not display any mesomorphic behavior.…”

Phase behaviour of liquid crystalline dendronized fullerene binary mixtures

“…Thus, in fullerene LCs as a rule lamellar structures maintain flat layers. 34–36 In the limiting case when large out-fanning groups are attached to fullerene, layers are replaced by columns. 37–40 Examples of the latter are column-forming dendronized fullerenes.…”

An unusual self-assembling columnar mesogen prepared by tethering a planar naphthalenediimide acceptor to bent phenothiazine donors

“…However, there are examples of columnar liquid crystalline constructs that possess both D and A units, and most molecular structures consist of planar p-conjugated units. [6][7][8][9][10][11][12][13][14] Flexible films that possess efficient n-and p-conduction channels would enable devices to take advantage of organic attributes and lead to next generation organic solar cells, field effect transistors or light emitting diodes. There is an urgent need to develop diversity in the molecular scaffolds that make up columnar, or discotic, assemblies.…”

“…1,2,53,54 Exploiting molecular shape using D and A building blocks to organize D-A structures has been reported using linked planar conjugated systems, such as triphenylene and PDI [7][8][9] or spherical shapes such as, fullerene-disc shape-amphiphiles, 6,10 fullereneoligo(phenylenevinylene) 11 or fullerene-dendritic structures. 12 To the best of our knowledge, there are no reports of a D-A conjugate that contains bent-core structures (as defined in Fig. 2b) and exhibits columnar liquid crystalline phases, as a design strategy for columnar mesogens.…”