Induced crystal G phase of liquid crystalline amide through inter molecular hydrogen bonding

Kumar, Ch. Ravi; Jha, Anjali; Sastry, S. Sreehari

doi:10.1016/j.jnoncrysol.2009.11.036

Cited by 11 publications

(6 citation statements)

References 24 publications

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“…This change in chemical shift is due to a decrease in electron density after the ionic interaction, whereas the aromatic carbon next to the alkoxy group shifts slightly from 163.69 to 163.57 ppm (Figure 3). Compound 4-DBA, with an n-dodecyloxy alkyl chain, shows enantiotropic liquid crystalline properties in agreement with the behavior observed for analogous benzoic acids carrying an alkoxy chain with different numbers of carbon atoms at position 4 of the aromatic ring [16][17][18]. Upon heating, 4-DBA showed three peaks corresponding to Cr-SmC-N-Iso transitions.…”

Section: Resultssupporting

confidence: 82%

Acetylene-bridged triazine-conjugated structures: synthesis and liquidcrystalline properties

Akkurt¹,

Al-Jumaili²,

Eran³

et al. 2019

Turk J Chem

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We report the synthesis and liquid crystalline properties of a new type of tribranched compound built up from triazine as the central core and electron-rich triazine rings as peripheral groups. An equimolar mixture of the star-shaped compound based on the 1,3,5-triazine core with 4-dodecyloxybenzoic acid produced an organic salt exhibiting a columnar mesophase with a dendritic growing texture at low temperatures. The liquid crystalline properties of the triazine-based compound and organic salt were investigated by differential scanning calorimetry and polarizing optical microscopy.

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Section: Resultssupporting

confidence: 82%

Acetylene-bridged triazine-conjugated structures: synthesis and liquidcrystalline properties

Akkurt¹,

Al-Jumaili²,

Eran³

et al. 2019

Turk J Chem

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show abstract

“…Compound 4-DBA, which has an n-dodecyloxy terminal chain, shows enantiotropic liquid crystalline properties that are in agreement with the behavior observed for analogous benzoic acids carrying an alkoxy chain with the different numbers of carbon atoms at 4position of the aromatic ring [31][32][33]. Upon heating, 4-DBA showed three peaks corresponding to Cr-SmC-N-Iso transitions.…”

Section: ■ Results and Discussionsupporting

confidence: 83%

Six-armed Structures Based on Benzene Ring, Synthesis and Characterization Via Sonogashira Coupling

et al. 2020

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A new six-armed compounds consist of benzene ring as a central core substituted with aromatic ring and three rod-like armed of 2-chloro-4,6-bis(dodecyloxy)-1,3,5-triazine as the peripheral arms unit which obtained by sequential nucleophilic substitution of chlorine atoms in cyanuric chloride. The substitution took place at the acetylenic periphery on the central benzene ring by Sonogashira coupling. Equimolar mixtures of the six-armed compounds based on the benzene core with the complementary 4-dodecyloxybenzoic acid, which already possessed liquid crystal property, resulted in an organic salt. The organic salts and structures were investigated by differential scanning calorimetry (DSC), and confirmed by spectroscopic methods (1H-NMR, 13C-NMR and Mass spectroscopy)

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“…T As shown in Figure 4, compound 4-DBA with n -dodecyloxy alkyl chain showed enantiotropic liquid crystalline properties that were in agreement with the behaviour observed for the analogous benzoic acids carrying an alkoxy chain with different numbers of carbon atoms at the 4-position of the aromatic ring [21][22][23][24][25][26][27]29]. The organic salt 5 exhibited a phase transition sequence of Cr 1 -Cr 2 -SmC-Iso which was in agreement with 3 endotherms in DSC cooling curves (Figure 4 centre).…”

Section: Compsupporting

confidence: 80%

Synthesis and liquid crystalline properties of new triazine-basedπ-conjugated macromolecules with chiral side groups

Akkurt¹,

Al-Jumaili²,

Ocak³

et al. 2020

Turk J Chem

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In this study, we reported the synthesis of a new tribranched macromolecule liquid crystal with triazine in the centre. The central triazine core is bonded via sequences of Sonigashira coupling to 3 triazine unites through acetylenic bridges. The triazines at the periphery are substituted with 2 chiral citronellyloxy side groups. The salt of the resulting star-shaped macromolecule, which was oily at room temperature, with 4-dodecyloxybenzoic acid at 1:1 ratio exhibited a Smectic C (SmC) mesophase. The liquid crystalline properties of organic salt were investigated using DSC (differential scanning calorimetry) and POM (polarizing optical microscopy).

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Induced crystal G phase of liquid crystalline amide through inter molecular hydrogen bonding

Cited by 11 publications

References 24 publications

Acetylene-bridged triazine-conjugated structures: synthesis and liquidcrystalline properties

Acetylene-bridged triazine-conjugated structures: synthesis and liquidcrystalline properties

Six-armed Structures Based on Benzene Ring, Synthesis and Characterization Via Sonogashira Coupling

Synthesis and liquid crystalline properties of new triazine-basedπ-conjugated macromolecules with chiral side groups

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