Hydrogen-bonded effects on supramolecular blue phase liquid crystal dimeric complexes

Wei, Chong Lun; Chen, Te Cheng; Raghunath, P.; Lin, Ming‐Chang; Lin, Hong‐Cheu

doi:10.1039/c5ra06868a

Cited by 15 publications

(14 citation statements)

References 45 publications

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“…: 132.7°C. Elemental analysis calculated for C 24 0.1 mol) was dissolved in 150 mL dry THF. The solution of 4ʹ-(chlorocarbonyl) biphenyl-4-yl-4-(trifluoromethyl) benzoate was added dropwise into the THF solution of PD.…”

Section: Synthesis Of the Intermediate Compoundsmentioning

confidence: 99%

“…LC dimers may be divided into two broad classes: symmetric [10,37,42] and nonsymmetric. [21,23,24,[29][30][31][32][33][34][35]42,43] In a symmetric LC dimer, the two mesogenic units are identical, whereas they are different in a non-symmetric dimer. The intercalated smectic phase was first observed in the study of LC dimers and, specifically, in non-symmetric dimers.…”

Section: Introductionmentioning

confidence: 97%

“…A wide range of chiral dimers, both symmetric [10,45] and non-symmetric, [11,24,43,45] have been reported in the literature. A key issue in the area of chiral LC dimers was to determine how the form chirality of the chiral phase would depend on the number of methylene groups in the flexible alkyl space.…”

Section: Introductionmentioning

confidence: 98%

“…A key issue in the area of chiral LC dimers was to determine how the form chirality of the chiral phase would depend on the number of methylene groups in the flexible alkyl space. [36,45] Cholesterol, [10,11,43,45] (S)-(-)-2-methyl-1-butanol [34,45] and (S)-(-)-2-methyl-1-enanthol [24] were usually used in chiral dimers. The bifunctional chiral reagents were seldom used in chiral trimers, [7,46] let alone in chiral dimers.…”

Section: Introductionmentioning

confidence: 99%

“…[1,5,[20][21][22][23] The simultaneous introduction of chirality and fluoro substituent into the LC molecule leads to new chiral functional materials. [5,19,24] It is necessary to synthesise different types of chiral fluorinated LCs to gain a better understanding of the factors controlling their properties. In this article, 1,2 propanediol (PD) was chosen as the chiral group for it has two reactive hydroxyl groups, which could be used to design the molecular structures of LCs conveniently.…”

Section: Introductionmentioning

confidence: 99%

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1,2-Propanediol-linked chiral symmetric and non-symmetric liquid crystal dimers containing trifluoromethyl

Yao

Feng

et al. 2016

Liquid Crystals

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2016): 1,2-Propanediol-linked chiral symmetric and nonsymmetric liquid crystal dimers containing trifluoromethyl, Liquid Crystals, ABSTRACT Four symmetric and non-symmetric chiral liquid crystal dimers containing trifluoromethyl groups, termed as TFBA-PD-TFBA, UEBBA-PD-TFBA, UEBA-PD-TFBA and UEA-PD-TFBA, respectively, have been synthesised and characterised. UEA-PD-TFBA exhibited chiral nematic phase, whereas the other three dimers displayed chiral smectic A phase. X-ray diffraction (XRD) has revealed the structure of the smectic A phase for TFBA-PD-TFBA to be intercalated, whereas that for UEBBA-PD-TFBA and UEBA-PD-TFBA to be monolayer and interdigitated, respectively. In addition, the weaker peak corresponding to a shorter layer spacing was observed for UEBBA-PD-TFBA and UEBA-PD-TFBA. Considering the results of XRD measurements and computer simulations, the structural model corresponding to the shorter layer spacing is assigned as horseshoe-like shape. The absence of smectic behaviour for UEA-PD-TFBA reveals that the weaker aromatic-aromatic interactions cannot stabilise the smectic A phase. ARTICLE HISTORY

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Section: Synthesis Of the Intermediate Compoundsmentioning

confidence: 99%