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

Tian, Ming; Zhang, Baoyan; Ye, Cong; He, Xiaodong; Zhang, Bing

doi:10.1016/j.molstruc.2009.08.026

Cited by 12 publications

(8 citation statements)

References 40 publications

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“…Over the past two years we have focused on this topic. Glucose, sorbitol and melitose had previously been used as chiral cores in the synthesis of cholesteric SSLCs [33,34]. Our results now indicate for the first time that glucose, melitose and sorbitol are able to induce a cholesteric phase in SSLCs containing nematic LC side-arms.…”

Section: Introductionsupporting

confidence: 58%

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Cholesteric star-shaped liquid crystals induced by a maltose core: synthesis and characteristics

Tian

Zhang

et al. 2010

Liquid Crystals

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Three esters of maltose (A1-A3) with 4-(4-(alkoxybenzoyloxy)phenoxy) -6-oxohexanoic acid (b1-b3) side-arms have been synthesised. All the maltose derivatives were laevo-rotationary, unlike their parent cores. The side arm b1 did not display liquid crystalline (LC) properties, and b2 and b3 displayed thermotropic nematic LC properties. The star-shaped compound (SSC) A1 with b1 side-arms did not display a mesomorphic phase. Unlike the nematic schlieren texture provided by side-arms b2 and b3, the star-shaped liquid crystals (SSLC) A2 and A3 displayed Grandjean and oily texture in the cholesteric phase. The results suggest that the LC properties of the side-arms have an important influence on the formation of LC properties in an SSC, and that the maltose core is important in determining the mesomorphic phase type. In other words, the SSC displayed LC properties only when the side-arms were also LC, and the maltose core induced a cholesteric phase in the SSLC with nematic side-arms. The mesomorphic regions for A2 and A3 were 39.1 and 53.7 • C during the heating cycle and 63.8 and 107.0 • C during the cooling cycle, respectively. The longer terminal chain rendered the mesomorphic region broader.

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Section: Introductionsupporting

confidence: 58%

“…According to results reported previously, b1 is a non-LC side-arm, but b2 and b3 are nematic [33]. The thermal properties and phase behaviour of the SSCs A1-A3 were investigated by DSC.…”

Section: Mesomorphic Propertiesmentioning

confidence: 90%

Cholesteric star-shaped liquid crystals induced by a maltose core: synthesis and characteristics

Tian

Zhang

et al. 2010

Liquid Crystals

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“…Over the past two years we have focused on whether a cholesteric SSLC might be generated by a chiral core. Glucose, sorbitol, maltose and melitose had previously been used as chiral cores in the synthesis of cholesteric SSLCs [9][10][11]. Our results now indicate for the first time that glucose, maltose, melitose and sorbitol are able to induce a cholesteric phase in SSLCs containing nematic LC side-arms.…”

Section: Introductionmentioning

confidence: 51%

“…The results of FT-IR, 1 H NMR spectroscopy and elementary analysis confirmed that the target star-shaped liquid crystal, a had been produced. The synthesis and properties of b and c were reported previously [10,11].…”

Section: Penta [4 -(4 -(Ethoxybenzoyloxy) Phenoxy) -6 -Oxohexanoic Ac...mentioning

confidence: 99%

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Effect of the Different Structure of the Chiral Core on Phase Behaviors of Cholesteric Star-Shaped Liquid Crystals

Tian

Yao

et al. 2011

AMR

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In the present work, a ester of glucose (a) with 4-(4-(ethoxybenzoyloxy) phenoxy) -6-oxohexanoic acid side–arms has been synthesized. Compared withbandc, reported previously,ahad the same side-arms but different chiral core. The phase behaviors of three star-shaped liquid crystals (a, b, c) have been compared and studied, and the effect of the different structure of chiral core on the phase behaviors of the star-shaped liquid crystals has been discussed. a, b andcdisplayed cholesteric phase, unlike the nematic side arm.a, b andcwere all laevo-rotationary, unlike their parent cores. The melting temperature of a, b andcdecreased with the increase of the sugar ring of the chiral core. The mesomorphic region ofaon cooling cycle was wider than that on heating cycle. Forbandc, the case was similar.

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λ-shaped to T-shaped azo diester mesogens having methyl (–CH3)/methoxy(–OCH3) terminal substituents with trisubstituted benzene

Yao

Koshti

Vyas

et al. 2021

Journal of Molecular Liquids

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

Cited by 12 publications

References 40 publications

Cholesteric star-shaped liquid crystals induced by a maltose core: synthesis and characteristics

Cholesteric star-shaped liquid crystals induced by a maltose core: synthesis and characteristics

Effect of the Different Structure of the Chiral Core on Phase Behaviors of Cholesteric Star-Shaped Liquid Crystals

λ-shaped to T-shaped azo diester mesogens having methyl (–CH3)/methoxy(–OCH3) terminal substituents with trisubstituted benzene

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