Journal ArticleDOI
Self-Assembly of C3h and Cs Symmetric Keto-enamine Forms of Tris(N-salicyl-ideneanilines) into Columnar Phases: A New Family of Discotic Liquid Crystals
Channabasaveshwar V. Yelamaggad,Ammathnadu S. Achalkumar,Doddamane S. Shankar Rao,Subbarao Krishna Prasad +3 more
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TLDR
A new class of discotic liquid crystals derived from tris(N-salicylideneanilines) existing exclusively in their C3h and Cs keto-enamine tautomeric forms is reported in this paper.Abstract:
A new class of discotic liquid crystals derived from tris(N-salicylideneanilines) existing exclusively in their C3h and Cs keto-enamine tautomeric forms is reported. These compounds self-assemble to form columnar liquid crystalline phases with a small core−core separation as evidenced by X-ray diffraction studies.read more
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Journal ArticleDOI
Hierarchical organization of photoresponsive hydrogen-bonded rosettes.
Shiki Yagai,Toshiharu Nakajima,Keiki Kishikawa,Shigeo Kohmoto,Takashi Karatsu,Akihide Kitamura +5 more
TL;DR: Hydrogen-bonded disk-shaped aggregates (rosettes) composed of azobenzene-appended melamine and barbiturate or cyanurate are investigated in view of their hierarchical organization and photoresponsive behavior, and dynamic light scattering and UV-irradiation experiments revealed that the dissociation and the reformation of columnar aggregates can be controlled by the trans-cis isomerization of the azOBenzene moiety.
Journal ArticleDOI
A supramolecular triarm star polymer from a homotritopic tris(crown ether) host and a complementary monotopic paraquat-terminated polystyrene guest by a supramolecular coupling method.
TL;DR: The first supramolecular star polymer based on pseudorotaxane host-guest complexation was prepared from statistical complexation of a homotritopic tris(crown ether) host and monotopic paraquat-terminated polystyrene guest in solution.
Journal ArticleDOI
Coordination-driven self-assembly of cavity-cored multiple crown ether derivatives and poly[2]pseudorotaxanes.
Koushik Ghosh,Hai-Bo Yang,Brian H. Northrop,Matthew M. Lyndon,Yao-Rong Zheng,David C. Muddiman,Peter J. Stang +6 more
TL;DR: The synthesis of a new 120 degree diplatinum(II) acceptor unit and the self-assembly of a series of two-dimensional metallacyclic polypseudorotaxanes that utilize both metal-ligand and crown ether-dialkylammonium noncovalent interactions are described, demonstrating the utility and scope of this orthogonal self- assembly technique.
Journal ArticleDOI
Torsionally responsive C3-symmetric azo dyes: azo-hydrazone tautomerism, conformational switching, and application for chemical sensing.
TL;DR: These findings implicate that the hydrogen-bonding donor ability is a key requirement for the binding-induced conformational switching, which allows for direct naked-eye detection of volatile amines under ambient conditions.
Journal ArticleDOI
Liquid crystalline order from ortho-phenylene ethynylene macrocycles.
Sang Hyuk Seo,Ticora V. Jones,Helga Seyler,Jack O. Peters,Tae Hyung Kim,Ji Young Chang,Gregory N. Tew +6 more
TL;DR: This work shows clearly that electron-rich PE macrocycles can form LC materials.
References
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MonographDOI
Supramolecular Chemistry: Concepts and Perspectives
TL;DR: From molecular to supramolescular chemistry: concepts and language of supramolecular chemistry, molecular recognition, information, complementarity molecular receptors - design principles and more.
Journal ArticleDOI
Self-Organized Discotic Liquid Crystals for High-Efficiency Organic Photovoltaics
Lukas Schmidt-Mende,Andreas Fechtenkötter,Klaus Müllen,Ellen Moons,Richard H. Friend,J. D. MacKenzie +5 more
TL;DR: Self-organization of liquid crystalline and crystalline-conjugated materials has been used to create, directly from solution, thin films with structures optimized for use in photodiodes, demonstrating that complex structures can be engineered from novel materials by means of simple solution-processing steps and may enable inexpensive, high-performance, thin-film photovoltaic technology.
Journal ArticleDOI
Fast photoconduction in the highly ordered columnar phase of a discotic liquid crystal
Dieter Adam,Peter Schuhmacher,Jürgen Simmerer,L. Häussling,K. Siemensmeyer,K. H. Etzbachi,Helmut Ringsdorf,Dietrich Haarer +7 more
TL;DR: In this article, it was shown that a highly ordered columnar phase of disk-like organic molecules can exhibit high mobilities for photoinduced charge carriers, of the order of 0.1 cm2 V-1 s-1, higher than for any organic material other than single-crystal phases.
Journal ArticleDOI
Functional materials based on self-assembly of polymeric supramolecules
TL;DR: H Hierarchically structured materials obtained by applying different self-organization and recognition principles and directed assembly form a basis for tunable nanoporous materials, smart membranes, preparation of nano- objects, and anisotropic properties, such as proton conductivity.
Journal ArticleDOI
Liquid crystals of disc-like molecules
TL;DR: Based on the x-ray data, a structure is proposed in which the discs are stacked one on top of the other in columns that constitute a hexagonal arrangement, but the spacing between the discs in each column is irregular as discussed by the authors.