Thermotropic liquid crystalline properties of 1,2Ψ,ω-<i>n</i>-alkan-tetraols

Hentrich, Frank; Diele, Siegmar; Tschierske, Carsten

doi:10.1080/02678299408035475

Cited by 57 publications

(19 citation statements)

References 23 publications

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“…The diols form a hydrogen bonded network at the layer interfaces, thus it is only the aliphatic chains that appear tilted. 68 It is interesting that if heteroatoms are introduced into the aliphatic chain, different mesophase sequences are observed. For example, compounds of structure 43, which are very similar in structure to 42, appear to exhibit more ordered soft crystal phases, i.e.…”

Section: Heads Joined By Chains -Bolaphilesmentioning

confidence: 99%

Thermotropic liquid crystalline glycolipids

et al. 2007

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Are the liquid crystalline properties of the materials of living systems important in biological structures, functions, diseases and treatments? There is a growing consciousness that the observed lyotropic, and often thermotropic liquid crystallinity, of many biological materials that possess key biological functionality might be more than curious coincidence. Rather, as the survival of living systems depends on the flexibility and reformability of structures, it seems more likely that it is the combination of softness and structure of the liquid-crystalline state that determines the functionality of biological materials. The richest sources of liquid crystals derived from living systems are found in cell membranes, of these glycolipids are a particularly important class of components. In this critical review, we will examine the relationship between chemical structure and the self-assembling and self-organising properties of glycolipids that ultimately lead to mesophase formation.

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Section: Heads Joined By Chains -Bolaphilesmentioning

confidence: 99%

Thermotropic liquid crystalline glycolipids

et al. 2007

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“… 38 − 42 In our previous simulation and experimental studies, a series of block oligomers containing sugar-based (A) and hydrocarbon-based (B) blocks were found to self-assemble into ordered thermotropic phases including LAM, perforated lamellae (PL), and CYL with domain periods as small as 1.2 nm, 43 − 45 and good agreement is observed for the domain spacing with experimental data. 44 , 46 …”

Section: Introductionmentioning

confidence: 99%

Stabilizing a Double Gyroid Network Phase with 2 nm Feature Size by Blending of Lamellar and Cylindrical Forming Block Oligomers

Shen

Luo

Park

et al. 2022

JACS Au

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Molecular dynamics simulations are used to study binary blends of an AB-type diblock and an AB 2 -type miktoarm triblock amphiphiles (also known as high-χ block oligomers) consisting of sugar-based (A) and hydrocarbon (B) blocks. In their pure form, the AB diblock and AB 2 triblock amphiphiles self-assemble into ordered lamellar (LAM) and cylindrical (CYL) structures, respectively. At intermediate compositions, however, the AB 2 -rich blend (0.2 ≤ x AB ≤ 0.4) forms a double gyroid (DG) network, whereas perforated lamellae (PL) are observed in the AB-rich blend (0.5 ≤ x AB ≤ 0.8). All of the ordered mesophases present domain pitches under 3 nm, with 1 nm feature sizes for the polar domains. Structural analyses reveal that the nonuniform interfacial curvatures of DG and PL structures are supported by local composition variations of the LAM- and CYL-forming amphiphiles. Self-consistent mean field theory calculations for blends of related AB and AB 2 block polymers also show the DG network at intermediate compositions, when A is the minority block, but PL is not stable. This work provides molecular-level insights into how blending of shape-filling molecular architectures enables network phase formation with extremely small feature sizes over a wide composition range.

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“…The results of investigations of [(C 16 ) 2 -Bim]Cl using polarized optical microscopy (POM) and X-ray diffraction (XRD) are in close resemblance to those found for 1,2,y,w-n-alkanetetraols, which form lamellar thermotropic liquid crystal phases. 10 The fan-like texture at 130 °C (Fig. 2) is characteristic for the lamellar a phase (L a ) as it is for that of tetraols.…”

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confidence: 96%