Use of Intermolecular Hydrogen Bonding between Imidazolyl Moieties and Carboxylic Acids for the Supramolecular Self-Association of Liquid-Crystalline Side-Chain Polymers and Networks

1998 ◽  
Vol 31 (14) ◽  
pp. 4475-4479 ◽  
Author(s):  
Taihei Kawakami ◽  
Takashi Kato
Keyword(s):  
Hydrogen Bonding ◽  
Carboxylic Acids ◽  
Liquid Crystalline ◽  
Side Chain ◽  
Intermolecular Hydrogen Bonding ◽  
Self Association

Molecular self-assembly of liquid crystalline side-chain polymers through intermolecular hydrogen bonding. Polymeric complexes built from a polyacrylate and stilbazoles

1992 ◽  
Vol 25 (25) ◽  
pp. 6836-6841 ◽  
Author(s):  
Takashi Kato ◽  
Hideyuki Kihara ◽  
Toshiyuki Uryu ◽  
Akira Fujishima ◽  
Jean M. J. Frechet
Keyword(s):  
Hydrogen Bonding ◽  
Self Assembly ◽  
Liquid Crystalline ◽  
Side Chain ◽  
Intermolecular Hydrogen Bonding ◽  
Polymeric Complexes

The interaction of dimethyl sulfoxide with N-benzoyl amino acids

1981 ◽  
Vol 34 (9) ◽  
pp. 1869 ◽  
Author(s):  
CW Fong ◽  
HG Grant
Keyword(s):  
Amino Acids ◽  
Hydrogen Bonding ◽  
Dimethyl Sulfoxide ◽  
Benzene Ring ◽  
Chemical Shifts ◽  
Side Chain ◽  
Torsional Angle ◽  
Intermolecular Hydrogen Bonding ◽  
Atom Increase ◽  
Self Association

The interaction of dimethyl sulfoxide with N-benzoyl amino acids in deuterochloroform has been investigated by 13C n.m.r. spectroscopy. Examination of the chemical shifts of the benzene ring reveals that intermolecular hydrogen bonding between dimethyl sulfoxide and the amido-hydrogen atom increase the effective steric size of the amino hydrogen, resulting in an increase in the torsional angle between the benzene ring and the C(O)NHCH(R)COOH side chain. Self-association of N- benzoyl amino acids in deuterochloroform occurs largely through two COOH...O=C hydrogen bonds and does not involve intermolecular hydrogen bonding to the N-H proton.

Complementary Hydrogen Bonding Between a Clicked C3-Symmetric Triazole Derivative and Carboxylic Acids for Columnar Liquid-Crystalline Assemblies

2011 ◽  
Vol 50 (25) ◽  
pp. 5737-5740 ◽  
Author(s):  
Mi-Hee Ryu ◽  
Jin-Woo Choi ◽  
Ho-Joong Kim ◽  
Noejung Park ◽  
Byoung-Ki Cho
Keyword(s):  
Hydrogen Bonding ◽  
Carboxylic Acids ◽  
Liquid Crystalline ◽  
Triazole Derivative

Molecular Association of Hydrogen Bonding Solutes, o-, m-, and p-Cresol, in Carbon Tetrachloride

1974 ◽  
Vol 52 (4) ◽  
pp. 653-660 ◽  
Author(s):  
Earl M. Woolley ◽  
Dennis S. Rushforth
Keyword(s):  
Hydrogen Bonding ◽  
Carbon Tetrachloride ◽  
Least Squares ◽  
Molecular Association ◽  
Intermolecular Hydrogen Bonding ◽  
Heats Of Dilution ◽  
Self Association

The intermolecular hydrogen-bonding self-association of the three cresols in CCl4 solutions at 25 °C has been investigated by calorimetric means. Calorimetrically determined heats of dilution of each of the cresols in anhydrous CCl4 are interpreted in terms of two different models: (i) dimerization and trimerization self-association reactions, and (ii) dimerization followed by stepwise polymerization self-association reactions. Values of K, ΔH0, and ΔS0 for these reactions are calculated using least-squares and other methods. Results show that o-cresol is clearly less associated in anhydrous CCl4 solution at 25 °C than either m- or p-cresol. Values of K2 and K3 (both based on molar concentrations of solutes) and ΔH20and ΔH30 (kcal) for the reactions [Formula: see text] respectively, are o-cresol: 0.7, 1.3,−3.4,−12.5; m-cresol: 0.8, 5.0,−5.0,−13.6; p-cresol: 0.35, 6.5,−5.5,−13.4. Values of K2 and Ks (both based on molar concentrations of solutes) and ΔH20 and ΔHs0 (kcal) for the reactions [Formula: see text] (all n > 2 with same Ks and ΔHS0), respectively, are o-cresol: 0.7, 1.6, −4.2, −4.5; m-cresol: 1.2, 4.0, −5.0, −4.3; p-cresol: 1.0, 7.0, −3.3, −3.5.

Preparation of side-chain liquid-crystalline polymers via pyridylphenol hydrogen bonding

1998 ◽  
Vol 199 (10) ◽  
pp. 2101-2105
Author(s):  
Xiaodong Wu ◽  
Guangli Zhang ◽  
Hongzhi Zhang
Keyword(s):  
Hydrogen Bonding ◽  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Side Chain ◽  
Crystalline Polymers

Liquid crystalline G phase of self assembled donor–acceptor molecules by intermolecular hydrogen bonding

2011 ◽  
Vol 357 (7) ◽  
pp. 1745-1749 ◽  
Author(s):  
S. Salma Begum ◽  
T. Vindhya Kumari ◽  
C. Ravi Shankar Kumar ◽  
S. Sreehari Sastry
Keyword(s):  
Hydrogen Bonding ◽  
Liquid Crystalline ◽  
Intermolecular Hydrogen Bonding ◽  
Donor Acceptor ◽  
Self Assembled ◽  
Acceptor Molecules

Inhibitors of the geotropic response in plants. The crystal structures of 2-[(Naphthalen-2-yl)carbamoyl]benzoic acid (β-Naptalam), 2-(Phenylcarbamoyl)-benzoic acid and 2-(5-Phenyl-1,3,4-oxadiazol-2-yl)benzoic acid

1983 ◽  
Vol 36 (12) ◽  
pp. 2455 ◽  
Author(s):  
G Smith ◽  
CHL Kennard ◽  
GF Katekar
Keyword(s):  
Hydrogen Bonding ◽  
Carboxylic Acid ◽  
Benzoic Acid ◽  
Crystal Structures ◽  
Carboxylic Acids ◽  
Intermolecular Hydrogen Bonding ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carboxylic Acid Groups ◽  
Phthalamic Acid

The crystal structures of three geotropically active phthalamic acid derivatives have been determined by means of X-ray diffraction and the structural systematics for the series compared. The three acids are conformationally similar and, in contrast to the tendency among carboxylic acids to form hydrogen-bonded dimers, they exist as monomers with intermolecular hydrogen bonding between the carboxylic acid groups and the nitrogen or oxygen of the amide side chains.

Symmetric bi-pyridyl banana-shaped molecule and its intermolecular hydrogen bonding liquid-crystalline complexes

2008 ◽  
Vol 891 (1-3) ◽  
pp. 312-316 ◽  
Author(s):  
Dan Sui ◽  
Qiufei Hou ◽  
Jia Chai ◽  
Ling Ye ◽  
Liyan Zhao ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Liquid Crystalline ◽  
Intermolecular Hydrogen Bonding

The Effect of Hydrogen Bonding on the Mesomorphic Properties for Side Chain Type Liquid Crystalline Polyurethanes

1996 ◽  
Vol 425 ◽  
Author(s):  
T. Mihara ◽  
N. Koide
Keyword(s):  
Hydrogen Bonding ◽  
Liquid Crystalline ◽  
Side Chain ◽  
Flexible Chain ◽  
Remarkable Change ◽  
Polymer Backbone ◽  
Phase Transition Temperatures ◽  
Ft Ir ◽  
Mesomorphic Properties ◽  
Chain Type

AbstractMesomorphic properties and temperature dependence of the hydrogen bonding between urethane bonds (H-bonding) for side chain type liquid crystalline polyurethane(SLCPU)s were studied by thermally controlled FT-IR spectroscopy. A remarkable change in the strength of H-bonding for SLCPUs with a flexible chain in the polymer backbone(flexible SLCPUs) was displayed near the phase transition temperatures, while small changes in the strength of H-bonding for SLCPUs with a rigid moiety in the polymer backbone(rigid SLCPUs) was influenced by a mesogenic group in the side chain and the flexible chain length in the polymer backbone. Furthermore, in order to study the influence of H-bonding in rigid SLCPUs, polyurethane derivatives with methyl group were synthesized replacing hydrogen in urethane bonds. No mesomorphic properties for polyurethane derivatives obtained were exhibited. It was concluded that H-bonding played an important role to exhibit mesomorphic properties of rigid SLCPUs.

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