Supermolecular self organization via molecular aggregation. Non-discotic three chain diols displaying a hexagonal columnar phase

Ebert, Martina; Kleppinger, Ralf; Soliman, Maria; Wolf, M.; Wendorff, Joachim H.; Lattermann, Günter; Staufer, Günter

doi:10.1080/02678299008033832

Cited by 33 publications

(10 citation statements)

References 26 publications

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“…Self-assembly of non-disklike molecules to form columnar mesophases was first noted for neat soaps, not a discotic system. More closely related to simple discotics are examples like diisobutylsilanediol, Lattermann's monoaryl esters of cis , cis -1,3,5-cyclohexanetriol, and Praefcke's inositol derivatives …”

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confidence: 99%

Discotic Liquid Crystals through Molecular Self-Assembly

1997

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We have created self-assembled disk-like aggregates of predictable stoichiometry which form discotic liquid crystalline phases. Attempts to assemble multiple molecules of one compound radially about a second acting as a template failed, presumably owing to the existence of a stable crystalline phase of the template. This difficulty was obviated by the choice of tetrakis(n-alkoxy)-6(5H)-phenanthridinones (1a−c), which were expected to form disk-like dimers by analogy with pyridones. All three of these compounds form columnar hexagonal liquid crystalline phases as shown by DSC, POM, and X-ray diffraction experiments. Infrared measurements show that 1a−c exist as hydrogen-bonded aggregates to temperatures well above their clearing points. Intercolumnar spacing and density considerations require the discotic entities to be dimers.

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confidence: 99%

Discotic Liquid Crystals through Molecular Self-Assembly

1997

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“…Resulting from X-ray and other measurements [21], the mesophase of the three chain diols was determined to be hexagonal columnar (Dhd). The discoid mesogenic unit is formed by the aggregation of six non-discoid single molecules.…”

Section: Polarizing Microscopymentioning

confidence: 99%

“…Therefore we refer to this case as a supramolecular mesogen. In this paper we want to give, in addition to previous results [18,19,21], a more detailed analysis of the thermal behaviour of the homologous series of cis,cis-(3,5-dihydroxycyclohexyl)-3,4,5-tris(alkoxy)benzoates in the dry as well as in the state after water absorption from either a water saturated atmosphere or from direct contact with water.…”

Section: Introductionmentioning

confidence: 98%

Hexagonal Columnar.cis, cis-(3,5-dihydroxycyclohexyl)-3,4,5-tris(alkoxy)benzoates Thermal behaviour and water absorption

1991

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“…Ideal calamitic molecules have Length to Breadth to Width values of L @ B � W and ideal discotic molecules have values of L = B @ W. Deviation from these two fundamental shapes has been a fruitful exercise in the design of new mesophase structures and has led to a better understanding of the fundamental forces that govern self-organization. [14,15] Boardshaped compounds, also referred to as lath-shaped or sanidic molecules, [16,17] combine the shape anisotropy of rod-and disc-shaped structures, which makes them multipotent building blocks for nematic, lamellar (smectic) and columnar mesophases. They have been applied widely in liquid crystal science (Figure 1).…”

Section: Introductionmentioning

confidence: 99%

Columnar Mesomorphism of Board‐Shaped Perylene, Diketopyrrolopyrrole, Isoindigo, Indigo, and Quinoxalino‐Phenanthrophenazine Dyes

et al. 2021

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The properties of organic dyes depend as much on their intermolecular interactions as on their molecular structure. While it is generally predictable what supramolecular structure would be ideal for a specific application, the generation of specific supramolecular structures by molecular design and suitable processing methods remains to be a challenge. A versatile approach to different supramolecular structures has been the application of mesomorphism in conjunction with alignment techniques and self‐assembly at interfaces. Reviewed here is the columnar mesomorphism of board‐shaped dyes perylene, indigo, isoindigo, diketopyrrolopyrrole, and quinoxalinophenanthrophenazine. They generate a larger number of different supramolecular structures than conventional disc‐shaped (discotic) mesogens because of their non‐circular shape and directional intermolecular interactions. The mesomorphism of all but the perylene derivatives is systematically and comprehensively covered for the first time.

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Supermolecular self organization via molecular aggregation. Non-discotic three chain diols displaying a hexagonal columnar phase

Cited by 33 publications

References 26 publications

Discotic Liquid Crystals through Molecular Self-Assembly

Discotic Liquid Crystals through Molecular Self-Assembly

Hexagonal Columnar.cis, cis-(3,5-dihydroxycyclohexyl)-3,4,5-tris(alkoxy)benzoates Thermal behaviour and water absorption

Columnar Mesomorphism of Board‐Shaped Perylene, Diketopyrrolopyrrole, Isoindigo, Indigo, and Quinoxalino‐Phenanthrophenazine Dyes

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