Isoflavone-based trimer liquid crystals: synthesis, characterization, thermal and mesomorphic properties evaluations

Mohammad, AbdulKarim‐Talaq; Srinivasa, H. T.; Alrawi, Rusul Yousif

doi:10.1080/02678292.2019.1622045

Cited by 11 publications

(3 citation statements)

References 44 publications

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“…[ 26 ] The absorption bands of the stretching vibration of C=C in the aromatic ring were observed in the region of 1620–1602 and 1577–1563 cm −1 . [ 27 ] Absorption peak of ether (C–O) group was observed at 1271–1242 cm −1 [ 28 ] ( Figures and ).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Spectroscopic Studies of New Dimmer Compounds

Buniya

Mohammada

Al-Majidi

2022

Macromolecular Symposia

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A series of a non‐symmetric dimmer of the type 4‐((4‐(((4‐(bromoalkyloxy)benzylidene)amino)methyl)benyl)imino)methyl)phenyl‐4‐(alkyloxy)benzoate contains Br terminal atoms are synthesized and characterized. The molecular structure of these compounds possessed four aromatic rings interconnected via two azomethine linking groups. In each molecule, the two identical methylene spacers vary from either C4H8 or C6H12 are present. The synthesized compounds are characterized using FT‐IR, 1H NMR, and 13C NMR. The results demonstrate the formation of the suggested structures of the prepared structures.

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Section: Resultsmentioning

confidence: 99%

Synthesis and Spectroscopic Studies of New Dimmer Compounds

Buniya

Mohammada

Al-Majidi

2022

Macromolecular Symposia

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“…Computational studies with organic molecules occupied interesting features toward stabilization of molecular structure for its stability, visualization of electronic properties, and nonlinear optical properties [28][29][30][31] suitable for optical and electronic applications.…”

Section: Introductionmentioning

confidence: 99%

Structural, electronic and optical properties of synthesized schiff base compound-validation with a computational method

Kumar,

Prasanti,

Jha

et al. 2024

Phys. Scr.

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Organic molecules have a profound impact on present-day technologies due to their structure, molecular interactions, ease of modification, and synthesis. The motivation of the present study is to synthesize a dielectric material at room temperature to accurately determine the optical properties the refractive index and dielectric constant and validate it using a computational method. Organic Schiff base compounds are synthesized in equimolar ratios with the host molecule Biphenyl-4-carboxaldehyde and guest molecules a family of distinct anilines using ultrasonication method. The advantages of this method over other conventional methods are a shorter reaction time, lower operating temperature, and easy work up with fewer amounts of solvents. Molecular aspects of synthesized Schiff bases were established by spectroscopic techniques i.e. IR, proton NMR and powdered X-ray diffraction methods showed that these results are consistent with the expected structure. Optical properties the refractive index and dielectric constant were recorded with a spectroscopic ellipsometer. Studies of computational methods provided optimized molecular structures with minimum energy with wavenumbers in agreement with recorded spectra. Quantum mechanical descriptors provide information on electronic and optical properties and help to visualize the corresponding changes in electron density using the Gaussian 16 package. The results of spectroscopic studies are in agreement with computed studies indicating that synthesized Schiff bases are active dielectric materials with major role of nitro compounds best suitable for optical and electronic properties with increased dielectric constant, refractive index and reduced energy.

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“…Использование соединений с группами атомов, способными к образованию специфических межмолекулярных связей, весьма перспективно при разработке жидкокристаллических (ЖК) материалов с прогнозируемым комплексом свойств [2]. За счет изменения совокупности слабых направленных взаимодействий разных типов, участвующих в формировании надмолекулярных архитектур, образуются соединения с новыми электрофизическими и мезоморфными свойствами [3][4][5][6][7][8][9][10] с сохранением общей анизотропии супрамолекулярных ансамблей. В настоящее время п-н-алкилоксибензойные кислоты (ОБК) являются востребованными прекурсорами для получения новых жидкокристаллических материалов [11][12][13][14][15].…”

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Cocrystals in Systems with Alkyloxybenzoic Acids: Formation Tendencies

Efremova¹,

Kudryashova²,

Nosikova³

et al. 2019

Liq. Cryst. and their Appl.

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Методами поляризационной оптической микроскопии и дифференциальной сканирующей калориметрии получены полные фазовые диаграммы бинарных систем, состоящих из гомологов п-налкилоксибензойных кислот с различной длиной алкоксильного заместителя: п-н-гексилоксибензойная кислота (6ОБК)-п-н-пентилоксибензойная кислота (5ОБК) и п-н-гексилоксибензойная кислота (6ОБК)-п-н-децилоксибензойная кислота (10ОБК). Рассмотрены закономерности образования сокристаллов в указанных системах. Полученные данные позволят спрогнозировать возможные изменения свойств в системах на основе замещенных бензойных кислот.

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Isoflavone-based trimer liquid crystals: synthesis, characterization, thermal and mesomorphic properties evaluations

Cited by 11 publications

References 44 publications

Synthesis and Spectroscopic Studies of New Dimmer Compounds

Synthesis and Spectroscopic Studies of New Dimmer Compounds

Structural, electronic and optical properties of synthesized schiff base compound-validation with a computational method

Cocrystals in Systems with Alkyloxybenzoic Acids: Formation Tendencies

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