Unusual Glass Transition of Smectic Liquid Crystal in p-n-Hexyloxybenzylidene-p’-Butylaniline

Sorai, Michio; Yoshioka, Hideki; Suga, Hiroshi

doi:10.1007/978-1-4613-2661-8_12

Cited by 3 publications

(1 citation statement)

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“…crystals. Attempts to prepare these so-called ordered glasses from non-polymeric liquid crystals by rapid cooling are not new, but in most systems these glasses undergo recrystallization upon heating (see, for example, [18][19][20]). The cholesterol derivative 1 shows a completely reversible glass transition (with preservation of order in the glassy state), which is independent of the cooling rate.…”

Section: Methodsmentioning

confidence: 99%

The supramolecular self-organization of an amphotropic cholesterol derivative Micelles, liposomes and liquid-crystalline phases

Decher

Ringsdorf

1993

Liquid Crystals

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The cholesterol derivative tetraethoxycholesteryl semisuccinate is both a mesogen and an amphiphile. This combination of both molecular prerequisites permits two types of supramolecular self-organization: the formation of a thermotropic liquid-crystalline phase and of various forms of aggregates in contact with water or other solvents. Depending on the pH of the aqueous medium the compound self organizes in micelles or liposomes. At high concentrations lyotropic liquid-crystalline phases are obtained. The formation of liposomes and lyotropic phases is not restricted to water as a solvent but can also be induced in pure organic media such as water-free diethyleneglycol. Due to the broad range of supramolecular structures that depend both on molecular shape and on amphiphilic properties we propose to call the title compound a model for amphotropic phase behaviour.

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Section: Methodsmentioning

confidence: 99%