Effect of position of the lateral fluoro substituent on the mesophase behaviour of aryl 4-alkoxyphenylazo benzoates in pure and binary mixtures

Ahmed, Nagwa H.S.; Saad, Gamal R.; Naoum, Magdi M.

doi:10.1080/02678292.2018.1449025

Cited by 21 publications

(3 citation statements)

References 48 publications

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“…For the terminal part, it has been demonstrated that the terminal substituents can be alkoxy chains or small polar compact substituents [ 16 , 17 ]. The terminal alkoxy chain of a liquid crystalline compound, in general, has a significant impacts in the development, thermal stability, type, and stability range of the mesophases of liquid crystal [ 13 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ]. According to the investigation findings [ 17 ], an increment in the terminal substituent length results in the molecules being oriented in a parallel arrangement, thereby promoting the formation of the smectic A phase.…”

Section: Introductionmentioning

confidence: 99%

Physical and Thermal Characterizations of Newly Synthesized Liquid Crystals Based on Benzotrifluoride Moiety

et al. 2023

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The mesomorphic stability and optical activity of new group-based benzotrifluoride liquid crystals, (E)-4-(((4-(trifluoromethyl) phenyl) imino) methyl) phenyl 4-(alkyloxy)benzoate, or In, were investigated. The end of the molecules connected to the benzotrifluoride moiety and the end of the phenylazo benzoate moiety have terminal alkoxy groups which can range in chain length from 6 to 12 carbons. The synthesized compounds’ molecular structures were verified using FT-IR, 1H NMR, mass spectroscopy, and elemental analysis. Mesomorphic characteristics were verified using differential scanning calorimetry (DSC) and a polarized optical microscope (POM). All of the homologous series that have been developed display great thermal stability across a broad temperature range. Density functional theory (DFT) determined the examined compounds’ geometrical and thermal properties. The findings showed that every compound is entirely planar. Additionally, by using the DFT approach, it was possible to link the experimentally found values of the investigated compounds’ investigated compounds’ mesophase thermal stability, mesophase temperature ranges, and mesophase type to the predicted quantum chemical parameters.

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Section: Introductionmentioning

confidence: 99%

Physical and Thermal Characterizations of Newly Synthesized Liquid Crystals Based on Benzotrifluoride Moiety

et al. 2023

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“…Phenyl benzoate derivatives are one of the most studied calamitic compounds. A chiral moiety, polar groups or alkoxy chains localize at terminal of the molecular structure and traditional calamitic mesophases such as lamellar phases (smectic) and nematic phases occur thermotropically [3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

“…The specific retention volume diagrams, , of nPB (1), iPB (2), ClB (3), EB (4), T (5), nBAc (6), iBAc(7) and EAc (8) on BDBB.…”

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confidence: 99%

Synthesis and characterization of novel 4-benzyloxyphenyl 4-[4-(n-dodecyloxy) benzoyloxy]benzoate liquid crystal

Balkanli¹,

Çakar²,

Ocak³

et al. 2021

Turk J Chem

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Liquid crystal (LC) compound 4-Benzyloxyphenyl 4-[4-(ndodecyloxy)benzoyloxy]benzoate (BDBB) has been prepared and characterized. Inverse gas chromatography (IGC) was reported as a beneficial analysis for the research of thermodynamic characteristics of the new LC. Acetate and alcohol isomers were used to examine LC selectivity via IGC technique between 333.2 K and 483.2 K. The retention diagrams of n-heptane, n-octane, n-nonane, n-decane, undecane, dodecane, tridecane, nbutyl acetate, isobutyl acetate, ethyl acetate, n-propylbenzene, isopropylbenzene, ethylbenzene, chlorobenzene and toluene on BDBB were plotted with temperature 2 between 483.2-493.2 K. Flory-Huggins interaction parameter and weight fraction activity coefficient at infinite dilution were researched for BDBB.

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New two rings Schiff base liquid crystals; ball mill synthesis, mesomorphic, Hammett and DFT studies

Nafee

Hagar

Ahmed

et al. 2020

Journal of Molecular Liquids

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Effect of position of the lateral fluoro substituent on the mesophase behaviour of aryl 4-alkoxyphenylazo benzoates in pure and binary mixtures

Cited by 21 publications

References 48 publications

Physical and Thermal Characterizations of Newly Synthesized Liquid Crystals Based on Benzotrifluoride Moiety

Physical and Thermal Characterizations of Newly Synthesized Liquid Crystals Based on Benzotrifluoride Moiety

Synthesis and characterization of novel 4-benzyloxyphenyl 4-[4-(n-dodecyloxy) benzoyloxy]benzoate liquid crystal

New two rings Schiff base liquid crystals; ball mill synthesis, mesomorphic, Hammett and DFT studies

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