Sugar-Coated Discotic Liquid Crystals

Barberá, Joaquín; Garcés, Ana C.; Jayaraman, Narayanaswamy; Omenat, Ana; Serrano, J. L.; Stoddart, J. Fraser

doi:10.1002/1521-4095(200102)13:3<175::aid-adma175>3.0.co;2-i

Cited by 44 publications

(23 citation statements)

References 11 publications

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“…A decyl‐linker connecting the core with mono‐sugar moiety at the periphery exhibited a rectangular columnar arrangement. Whereas, the same linker connecting the core with a tris‐sugar moiety at the periphery led to hexagonal columnar mesophase structure …”

Section: Resultsmentioning

confidence: 99%

Connector type‐controlled mesophase structures in poly(propyl ether imine) dendritic liquid crystals of identical dendrimer generations

Kumar

Rao

Prasad

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

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Poly(propyl ether imine) (PETIM) dendrimers of one to three generations are used as dendritic cores to identify the influence of varying connector types that connect the dendritic core with peripheral mesogens on the emerging liquid crystalline (LC) properties. The LC properties vary in these dendritic liquid crystals, even when the dendrimer generations and thus the number of peripheral mesogenic moieties remain identical. PETIM dendrimer generations one to three, ester and amide connectors varying with succinates, phthalates, and succinamides, are studied herein. Cholesteryl moieties are installed at the peripheries through the above connectors to induce mesogenic properties. These modified dendritic liquid crystals reveal a layered mesophase structure in most ester and amide connector‐derivatives, whereas a third‐generation phthalate ester dendrimer favors a rectangular columnar mesophase structure. A transition from layered to a rectangular columnar structure results by a mere change in the connector varying between a succinate or succinamide or phthalate, within one particular dendrimer generation and without altering the underlying dendrimer core or the number of mesogenic moieties. The study demonstrates that in dendritic liquid crystals with essentially identical chemical constitutions, a change in the connector type connecting the mesogen with the dendrimer core is sufficient to change the mesophase structures. © 2017 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2017, 55, 3665–3678

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Section: Resultsmentioning

confidence: 99%

Connector type‐controlled mesophase structures in poly(propyl ether imine) dendritic liquid crystals of identical dendrimer generations

Kumar

Rao

Prasad

et al. 2017

J. Polym. Sci. Part A: Polym. Chem.

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“…The first of these was 2,3,6,7,10,11 hexa (1,4,7 trioxaoctyl) triphenylene (TP6EO2M), which forms hydrogels / lyotropic phases in water 13,14,15 . Subsequently several triphenylene derivatives have been reported which are capable of gelating organic solvents 6,16,17,18,19,20,21,22,23,24,25,26 , while others have been shown to form physical gels in combination with an additional gelator 27 . This reflects an increasing interest in low molecular weight organogelators (LMOGs) generally 28 , and π gelators in particular 29 , due to their manifold potential technological applications.…”

Section: ! "mentioning

confidence: 99%

Synthesis and organogelating behaviour of amino acid-functionalised triphenylenes

et al. 2017

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Four novel amino acid-functionalised triphenylenes have been prepared with glycine, l-alanine, l-phenylalanine and l-tryptophan ethyl ester side-chains. The glycine derivative is a good gelator of chloroform, the alanine derivative gels ethanol and toluene, and the phenylalanine derivative gels benzene and toluene. The tryptophan derivative does not gel any of the solvents tested, most probably due to its more bulky structure, but forms microspheres by evaporation-induced self-assembly. The self-assembly properties of the π-gelators have been investigated using infrared, UV-absorption and fluorescence spectroscopy, concentration- and temperature-dependent NMR, and X-ray scattering experiments on dried xerogel as well as the wet organogel. The latter experiments suggest the glycine gel in chloroform includes columnar aggregates, with an overall disordered columnar oblique mesophase. These compounds are of interest because of the well-known hole-transporting properties of triphenylene liquid crystals: 1-D columnar assemblies of these compounds may find applications in organic electronic devices.

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“…Derivatives of benzene and condensed aromatic rings are often taken as cores of SSLCs. The SSLCs usually exhibit thermotropic or lytropic LC properties [39]. The common mesophase of SSLCs is columnar phase.…”

Section: Introductionmentioning

confidence: 99%

Mesomorphic properties of chiral nematic star-shaped liquid crystals containing melitose as cores

Tian

Zhang

et al. 2009

Journal of Molecular Structure

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Sugar-Coated Discotic Liquid Crystals

Cited by 44 publications

References 11 publications

Connector type‐controlled mesophase structures in poly(propyl ether imine) dendritic liquid crystals of identical dendrimer generations

Connector type‐controlled mesophase structures in poly(propyl ether imine) dendritic liquid crystals of identical dendrimer generations

Synthesis and organogelating behaviour of amino acid-functionalised triphenylenes

Mesomorphic properties of chiral nematic star-shaped liquid crystals containing melitose as cores

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