Supramolecular synthesis with N-hetero-tolanes: liquid crystals and hydrogen-bonded and halogen-bonded co-crystals

CrystEngComm ◽  
2020 ◽  
Vol 22 (3) ◽  
pp. 416-419
Author(s):  
Linda Flores ◽  
Ismael López Duarte ◽  
Berta Gómez-Lor ◽  
Enrique Gutierrez-Puebla ◽  
Gunther Hennrich
Keyword(s):  
Liquid Crystals ◽  
Halogen Bonding ◽  
Crystalline Aggregates ◽  
Hydrogen Bonded

Supramolecular, crystalline aggregates are obtained from EO-active N-hetero-tolanes by protonation or halogen bonding.

Halogen Bonding Directed Supramolecular Quadruple and Double Helices from Hydrogen-Bonded Arylamide Foldamers

2018 ◽  
Vol 58 (1) ◽  
pp. 226-230 ◽  
Author(s):  
Chuan-Zhi Liu ◽  
Satish Koppireddi ◽  
Hui Wang ◽  
Dan-Wei Zhang ◽  
Zhan-Ting Li
Keyword(s):  
Halogen Bonding ◽  
Double Helices ◽  
Arylamide Foldamers ◽  
Hydrogen Bonded

Selective Absorption of Hydrophobic Cations in Nanostructured Porous Materials from Crosslinked Hydrogen-Bonded Columnar Liquid Crystals

2015 ◽  
Vol 2 (7) ◽  
pp. 1500022 ◽  
Author(s):  
Gerardus M. Bögels ◽  
Huub P. C. van Kuringen ◽  
Ivelina K. Shishmanova ◽  
Ilja K. Voets ◽  
Albertus P. H. J. Schenning ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Porous Materials ◽  
Selective Absorption ◽  
Hydrogen Bonded

Experimental and computational (DFT) studies on induced orthogonal smectic A∗ phase in hydrogen-bonded ferroelectric liquid crystals

2018 ◽  
Vol 32 (21) ◽  
pp. 1850223 ◽  
Author(s):  
P. Subhasri ◽  
R. Jayaprakasam ◽  
V. N. Vijayakumar
Keyword(s):  
Liquid Crystals ◽  
Molecular Orbital ◽  
Density Functional ◽  
Liquid Crystalline ◽  
Proton Acceptor ◽  
Dft Studies ◽  
Ferroelectric Liquid Crystals ◽  
Smectic A ◽  
Present Complex ◽  
Hydrogen Bonded

Hydrogen-bonded ferroelectric liquid crystals (HBFLC) are designed and synthesized from nonmesogenic chiral proton donor compound of (R)-([Formula: see text])-Methylsuccinic acid (MSA) and mesogenic proton acceptor compound of 4-undecyloxybenzoic acid (11OBA) in a different mole ratio. Intermolecular hydrogen bonds (H-bond) between the nonmesogenic and mesogenic compounds have been confirmed through experimental Fourier transform infrared spectroscopy (FTIR) and density functional theory (DFT) computational studies. The steric hindrance and inductive effects of the present complex and its influence on the structure are discussed. A rich phase polymorphism in the liquid crystalline complex has been studied using polarizing optical microscope (POM) and differential scanning calorimetry (DSC). The chiral phases observed in the present complex are due to the presence of lone pair (n) to anti-bonding ([Formula: see text]) transition symmetry which is validated by DFT studies. A noteworthy observation of induced smectic A[Formula: see text](Sm A[Formula: see text]) by quenching of traditional phase (nematic) has been identified and the reason for the same has been discussed by DFT studies. The unusual phase order of Sm A[Formula: see text], smectic C[Formula: see text](Sm C[Formula: see text]) and smectic G[Formula: see text][Formula: see text](Sm G[Formula: see text]) mesogenic phases are observed. The other liquid crystalline parameters are evaluated by experimental and theoretical calculations and the same has been compared. Increased tilt angle in liquid crystal (LC) molecules has been theoretically analyzed by natural bond orbital (NBO) studies. Stability of the HBFLC phases and its origination mechanism have been discussed with the help of highest occupied molecular orbital and lowest unoccupied molecular orbital (HOMO–LUMO) energies.

scholarly journals Experimental Observation of Induced Thermochromic Effect and Nematic Defects in Hydrogen Bonded Liquid Crystals

2021 ◽  
Vol 139 (2) ◽  
pp. 139-144
Author(s):  
T. Vasanthi ◽  
V Balasubramanian ◽  
S. Radjarejesri ◽  
V.N. Vijayakumar
Keyword(s):  
Liquid Crystals ◽  
Experimental Observation ◽  
Thermochromic Effect ◽  
Hydrogen Bonded

scholarly journals Synthesis and mesophase behaviour of branched azobenzene-based supramolecular hydrogen-bonded liquid crystals

2017 ◽  
Vol 44 (3) ◽  
pp. 593-602 ◽  
Author(s):  
Wan-Li He ◽  
Han Gu ◽  
Peng Zhao ◽  
Zhou Yang ◽  
Hui Cao ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Hydrogen Bonded
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