New Self-Organizing Optical Materials and Induced Polymorphic Phases of Their Mixtures Targeted for Energy Investigations

被引:12
作者
Alrefaee, Salhah H. [1 ]
Ahmed, Hoda A. [1 ,2 ]
Khan, Mohd Taukeer [3 ]
Al-Ola, Khulood A. [4 ]
AL-Refai, Hanaa [1 ]
El-Atawy, Mohamed A. [1 ,5 ]
机构
[1] Taibah Univ, Dept Chem, Coll Sci, Yanbu 30799, Saudi Arabia
[2] Cairo Univ, Dept Chem, Fac Sci, Cairo 12613, Egypt
[3] Islamic Univ Madinah, Dept Phys, Fac Sci, Al Madinah Al Munawwarah 42351, Saudi Arabia
[4] Taibah Univ, Dept Chem, Coll Sci, Madina Monawara, Al Madina 30002, Saudi Arabia
[5] Alexandria Univ, Dept Chem, Fac Sci, POB 426 Ibrahemia, Alexandria 21321, Egypt
关键词
fluorinated liquid crystals; optical properties; thin film; geometrical structure; polymorphic phases; energy gap; DIMERIC LIQUID-CRYSTALS; MESOMORPHIC BEHAVIOR; SUBSTITUTION; STABILITY; FLUORINE; BONDS;
D O I
10.3390/polym14030456
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Herein, a new homologues series of fluorinated liquid crystal compounds, In, 4-(((4-fluorophenyl)imino)methyl)-2-methoxyphenyl 4-alkoxybenzoate were synthesized and its mesomorphic properties were investigated both experimentally and theoretically. The synthesized compounds were characterized by elemental analyzer, NMR, and FT-IR spectroscopy to deduce the molecular structures. The differential scanning calorimetry was employed to examine mesophase transitions whereas the polarized optical microscopy was used to identify the mesophases. The obtained results revealed that the purely nematic phase observed in all terminal side chains. All homologues showed to possess monotropic nematic mesophases except the derivative I8 exhibits enantiotropic property. The optimized geometrical structures of the present designed groups have been derived theoretically. The experimental data was explained using density functional theory computations. The estimated values of dipole moment, polarizability, thermal energy, and molecule electrostatic potential demonstrated that the mesophase stability and type could be illustrated. Binary phase diagram was constructed and addressed in terms of the mesomorphic temperature range and obtained polymorphic phases. It was found that incorporation of the terminal F-atom and lateral CH3O group influence both conformation and steric effect in pure and mixed states. The absorption and fluorescence emission spectra of fabricated films were recorded to elucidate the impact of terminal side chain on photophysical properties of synthesized liquid crystal. It was noted that the increase of terminal side chain length lead to reduction of optical band gap, whereas charge carrier lifetime increases.
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页数:16
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[1]   Experimental and geometrical structure characterizations of new synthesized laterally fluorinated nematogenic system [J].
A. El-Atawy, Mohamed ;
Alhaddad, Omaima. A. ;
Ahmed, Hoda A. .
LIQUID CRYSTALS, 2021, 48 (15) :2106-2116
[2]   Heliconical smectic phases formed by achiral molecules [J].
Abberley, Jordan P. ;
Killah, Ross ;
Walker, Rebecca ;
Storey, John M. D. ;
Imrie, Corrie T. ;
Salamonczyk, Miroslaw ;
Zhu, Chenhui ;
Gorecka, Ewa ;
Pociecha, Damian .
NATURE COMMUNICATIONS, 2018, 9
[3]   Synthesis and mesomorphic study of new phenylthiophene liquid crystals [J].
Ahmed, Hoda A. ;
Aboelnaga, Asmaa .
LIQUID CRYSTALS, 2022, 49 (06) :804-811
[4]   Synthesis, mesomorphic and geometrical approaches of new non-symmetrical system based on central naphthalene moiety [J].
Ahmed, Hoda A. ;
A. El-Atawy, Mohamed .
LIQUID CRYSTALS, 2021, 48 (14) :1940-1952
[5]   Synthesis, Optical and DFT Characterizations of Laterally Fluorinated Phenyl Cinnamate Liquid Crystal Non-Symmetric System [J].
Al-Mutabagani, Laila A. ;
Alshabanah, Latifah A. ;
Ahmed, Hoda A. ;
El-Atawy, Mohamed A. .
SYMMETRY-BASEL, 2021, 13 (07)
[6]   Synthetic, Mesomorphic, and DFT Investigations of New Nematogenic Polar Naphthyl Benzoate Ester Derivatives [J].
Al-Zahrani, Salma A. ;
Ahmed, Hoda A. ;
El-atawy, Mohamed A. ;
Abu Al-Ola, Khulood A. ;
Omar, Alaa Z. .
MATERIALS, 2021, 14 (10)
[7]   Synthesis, Phase Behavior and Computational Simulations of a Pyridyl-Based Liquid Crystal System [J].
Alamro, Fowzia S. ;
Ahmed, Hoda A. ;
Popoola, Saheed A. ;
Aboelnaga, Asmaa .
MOLECULES, 2021, 26 (21)
[8]   Thermal and Mesomorphic Investigations of 1:1 Supramolecular Assemblies of 4-[(4-(n-Alkoxy)phenylimino)methyl]benzoic Acids Having Symmetrical and Un-Symmetrical Terminal Chain Lengths [J].
Alamro, Fowzia S. ;
Ahmed, Hoda A. ;
Mostafa, Ayman M. ;
Naoum, Magdi M. .
SYMMETRY-BASEL, 2021, 13 (10)
[9]   Induced Nematic Phase of New Synthesized Laterally Fluorinated Azo/Ester Derivatives [J].
Alamro, Fowzia S. ;
Ahmed, Hoda A. ;
El-Atawy, Mohamed A. ;
Al-Zahrani, Salma A. ;
Omar, Alaa Z. .
MOLECULES, 2021, 26 (15)
[10]  
Alamro FS, 2021, SCI REP-UK, V11, DOI 10.1038/s41598-021-94533-6