Complete assignment of 13C NMR spectra and determination of orientational order parameter for antiferroelectric liquid-crystalline MHPOBC

Article Abstract:

The assignment of the 13C nuclear magnetic resonance lines for the isotropic and oriented samples of the antiferroelectric liquid-crystalline MHPOBC and its analogue TFMHPOBC was completed to determine the location of the molecular long axis and the value of the orientational order parameter. Two of the six lines in each of the protonated and nonprotonated aromatic lines were found to exhibit a less pronounced temperature dependence. The orientational order parameter was found to be 0.73 at 403 K in the S(sub A) phase.

Molecular dynamics

---

High-resolution 13C NMR study of an antiferroelectric liquid crystal: verification of the bent chain structure

Article Abstract:

13C nuclear magnetic resonance experiments were performed on the antiferroelectric liquid crystal MHPOBC, 4-[(1-methylheptyloxy)carbonyl]phenyl 4-[4-(octyloxy)biphenyl]carboxyalte to investigate its chain geometries. The average direction of the chiral chain was found to deviate from the molecular long axis by up to 43 degrees. The average direction of the achiral chain was found to extend along the molecular long axis.

Usage, Carbon, Chirality, Molecular structure

---

(super 31)P and (super 13)C NMR studies of a liquid-crystalline cyclotriphosphazene derivative: orientational characteristics and contrasting shielding anisotropies for inorganic and organic moietie

Article Abstract:

The fundamental liquid-crystalline properties of a cyclotriphosphazene (ctp) derivative, hexakis[4-dodecyl(4-biophenoxy)]ctp are analyzed by means of (super 31)P and (super 13)C NMR spectroscopies. The present ctp derivative exhibits a molecular structure in the liquid-crystalline state as illustrated.

Analysis, Spectra, Structure, NMR spectroscopy, Phosphazo compounds, Polyphosphazenes

Similar abstracts:

• Abstracts: Quantum simulations of the structure and binding of glycopeptide antibiotic aglycons to cell wall analogues. Molecular dynamics simulations of DNA with polarizable force fields: Convergence of an ideal B-DNA structure to the crystallographic structure
• Abstracts: Synthesis and characterization of stable organosols of silver nanoparticles by electrochemical dissolution of silver in DMSO
• Abstracts: Electroreflectance study of hemin adsorbed on a HOPG electrode: estimation of molecular orientation and analysis of nonfaradaic electroreflectance signal due to the stark effect
• Abstracts: Vibrational relaxation of normal and deuterated liquid nitromethane. Long-lived interfacial vibrations of water
• Abstracts: Temperature dependence of CO-tolerant hydrogen oxidation reaction activity at Pt, Pt-Co, and Pt-Ru electrodes

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.