Thermotropic Liquid Crystalline Complexes of Hydrogen-Bonded Poly(pyridylpyridinium dodecyl methacrylate) Bromide and Octylphenol

2004 ◽  
Vol 37 (25) ◽  
pp. 9366-9372 ◽  
Author(s):  
C. Geraldine Bazuin ◽  
Christophe Brodin
Keyword(s):  
Liquid Crystalline ◽  
Dodecyl Methacrylate ◽  
Crystalline Complexes Of ◽  
Hydrogen Bonded

Synthesis and phase behaviour of hydrogen‐bonded liquid crystalline complexes of allyloxybenzoic acid compounds with 4,4′‐bipyridine

2007 ◽  
Vol 34 (7) ◽  
pp. 855-860 ◽  
Author(s):  
Qiang Wei ◽  
Lin Shi ◽  
Xiaotao Yuan ◽  
Lipei Zhang ◽  
Hui Cao ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Phase Behaviour ◽  
Crystalline Complexes Of ◽  
Hydrogen Bonded

Dielectric properties of a hydrogen-bonded liquid-crystalline side-chain polymer

1995 ◽  
Vol 16 (10) ◽  
pp. 733-739 ◽  
Author(s):  
Kazuo Araki ◽  
Takashi Kato ◽  
Uday Kumar ◽  
Jean M. J. Fréchet
Keyword(s):  
Dielectric Properties ◽  
Liquid Crystalline ◽  
Side Chain ◽  
Chain Polymer ◽  
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.

Hierarchical nanostructures of a liquid crystalline block copolymer with a hydrogen-bonded calamitic mesogen

Polymer ◽  
2019 ◽  
Vol 182 ◽  
pp. 121835 ◽  
Author(s):  
Hongbing Pan ◽  
Anqi Xiao ◽  
Wei Zhang ◽  
Longfei Luo ◽  
Zhihao Shen ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Liquid Crystalline ◽  
Hierarchical Nanostructures ◽  
Hydrogen Bonded

Liquid crystalline complexes of 4-alkoxystilbazoles with silver 1,12-dodecylene disulphate

2004 ◽  
Vol 31 (11) ◽  
pp. 1445-1456 ◽  
Author(s):  
H. Loc Nguyen ◽  
Peter Horton ◽  
Michael Hursthouse ◽  
Duncan Bruce
Keyword(s):  
Liquid Crystalline ◽  
Crystalline Complexes Of
Sign in / Sign up

Export Citation Format

Share Document