alexa Orientational effects of hydrogen bonding in liquid-crystalline solutions containing Schiff bases
Chemical Engineering

Chemical Engineering

Journal of Chromatography & Separation Techniques

Author(s): V A Burmistrov, V V Alexandriysky, O I Koifman

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Intermolecular hydrogen bonding in binary mixtures containing nematogenic Schiff bases as solvents and proton-donating non-mesomorphic solutes has been considered. Reasons for the anomalous concentration dependences of solute order parameters are discussed. A solution structure model of acetic acid in nematic solvents is proposed; constants of complex-dimer equilibrium and coefficients of the orientational correlation of the non-mesogenic solute are calculated on the basis of this model. Hydrogen bonded complex structure using 13C NMR has been studied and stability constants in isotropic solutions in chloroform have been calculated. The influence of the solvent orientational ordering on the complex stability is discussed. Data on the solvation isotopic effects in the solutions investigated, which confirm the adequacy of the model are given.

This article was published in Liquid Crystals and referenced in Journal of Chromatography & Separation Techniques

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