Induction and Variation of Chirality in Discotic Liquid Crystalline Polymers

Green, Mark M.; Ringsdorf, Helmut; Wagner, Jürgen; Wüstefeld, Renate

doi:10.1002/anie.199014781

Cited by 67 publications

(17 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[124][125][126][127][128] Very recently, our group established a supramolecular system for the modulation of self-assembly through weak charge-transfer interactions. [129] As shown in Figure 18, an amphiphilic electron donor, 1-[11-oxo-11-(pyren-1-ylmethoxy)-undecyl]pyridinium bromide (PYR), and a hydrophobic electron acceptor, ethane-1,2-diyl bis(3,5-dinitrobenzoate) (DNB), were involved in the formation of a charge-transfer-interaction-based supramolecular amphiphile.…”

Section: Charge-transfer Interactionsmentioning

confidence: 99%

Tuning the Amphiphilicity of Building Blocks: Controlled Self‐Assembly and Disassembly for Functional Supramolecular Materials

2009

View full text Add to dashboard Cite

Amphiphilicity is one of the molecular bases for self‐assembly. By tuning the amphiphilicity of building blocks, controllable self‐assembly can be realized. This article reviews different routes for tuning amphiphilicity and discusses different possibilities for self‐assembly and disassembly in a controlled manner. In general, this includes irreversible and reversible routes. The irreversible routes concern irreversible reactions taking place on the building blocks and changing their molecular amphiphilicity. The building blocks are then able to self‐assemble to form different supramolecular structures, but cannot remain stable upon loss of amphiphilicity. Compared to the irreversible routes, the reversible routes are more attractive due to the good control over the assembly and disassembly of the supramolecular structure formed via tuning of the amphiphilicity. These routes involve reversible chemical reactions and supramolecular approaches, and different external stimuli can be used to trigger reversible changes of amphiphilicity, including light, redox, pH, and enzymes. It is anticipated that this line of research can lead to the fabrication of new functional supramolecular assemblies and materials.

show abstract

Section: Charge-transfer Interactionsmentioning

confidence: 99%

Tuning the Amphiphilicity of Building Blocks: Controlled Self‐Assembly and Disassembly for Functional Supramolecular Materials

2009

View full text Add to dashboard Cite

show abstract

“…[159] These types of amplification mechanisms will attract considerable interest in the coming years as similar effects have been observed in other helical polymers [160] and dynamic aggregates of disc-shaped molecules. [161] Finally, it should be emphasized that chirality at a molecular level is not a prerequisite to observe chirality at the macroscopic level, that is, it is not essential to have chiral molecules as building blocks.…”

Section: Amplification In Macromolecules and Supramolecular Assembliesmentioning

confidence: 95%

Absolute Asymmetric Synthesis: The Origin, Control, and Amplification of Chirality

Feringa

Delden

1999

Angewandte Chemie International Edition

732

203

View full text Add to dashboard Cite

Biomolecular homochirality, the origin of which is still a puzzle, has challenged scientists to design chemical systems that provide chiral molecules through absolute asymmetric synthesis and to amplify a small stereochemical bias in such systems. The photoresolution of the enantiomers of helical-shaped, sterically overcrowded alkene 1 with circularly polarized light and the transduction of the stereochemical information by triggering the helical arrangement of a large collection of achiral molecules in a twisted nematic liquid crystalline phase (2) are examples of control and amplification of chirality.

show abstract

“…95,96 Ringsdorf et al 95 used charge-transfer interactions between electron-rich triphenylene and 2,4,7-trinitrofluorenone units to produce LC discotic polymers. Introduction of chirality into these charge-transfer polymeric complexes yields LC discotic polymers with helical order of the columns.…”

Section: Supramolecular Design Of Lc Polymersmentioning

confidence: 99%

“…Introduction of chirality into these charge-transfer polymeric complexes yields LC discotic polymers with helical order of the columns. 96 On the basis of the supramolecular design described above, functional supramolecular LC polymers have been developed ( Figure 6). 51,[97][98][99][100][101][102][103][104][105] Ferroelectricity can be induced for hydrogenbonded LC polymer 15 exhibiting chiral smectic C phases.…”

Section: Supramolecular Design Of Lc Polymersmentioning

confidence: 99%

Functional liquid-crystalline polymers and supramolecular liquid crystals

Kato

Uchida

Ichikawa

et al. 2017

Polym J

100

View full text Add to dashboard Cite

The design and functions of liquid-crystalline (LC) polymers with classifying them into conventional-, supramolecular-, dendriticand network-type LC polymers are described. LC polymers show new functions as new devices in the field of energy and environment by incorporating mesogenic moieties exhibiting photonic, electronic and ionic functions. Supramolecular LC polymers show dynamic and unique properties because the mesogenic moieties are built with non-covalent interactions. Dendritic-type LC polymers exhibit liquid crystallinity by nanosegregation of aromatic and aliphatic moieties. Dendritic fork-like mesogens have also been prepared. A variety of nonmesogeic functional building blocks including fullerene, π-conjugated moieties, catenane, rotaxane and others can be incorporated into LC phases by attaching these dendritic moieties. LC networks are constructed in situ polymerization of polymerizable nematic or nanostructured liquid crystals. The specific characteristics of the LC networks have generated new research trends to develop well-defined polymers that exhibit optical, transport and separation properties. In these materials, through suitable design of LC monomers, the preservation of smectic, columnar and bicontinuous cubic phases has been successfully used for the development of membranes with one-dimensional, two-dimensional and three-dimensional nanostructures.

show abstract

Induction and Variation of Chirality in Discotic Liquid Crystalline Polymers

Cited by 67 publications

References 20 publications

Tuning the Amphiphilicity of Building Blocks: Controlled Self‐Assembly and Disassembly for Functional Supramolecular Materials

Tuning the Amphiphilicity of Building Blocks: Controlled Self‐Assembly and Disassembly for Functional Supramolecular Materials

Absolute Asymmetric Synthesis: The Origin, Control, and Amplification of Chirality

Functional liquid-crystalline polymers and supramolecular liquid crystals

Contact Info

Product

Resources

About