Год выпуска: 2014 Автор: Nasreen Jber,Ammar AlDujaili and Shahbaz Maki Издательство: LAP Lambert Academic Publishing Страниц: 104 ISBN: 9783659337994
Описание
A fact of intermolecular reactions or interactions between the liquid crystal and the chromatographed substances is important for the understanding of the phenomena taking place in the chromatographic column. The structure of the molecules and their polarity and polarizability affect, as well as, the solubility of the chromatographed substances in the liquid crystal plays an important influence on the separation. The properties of the liquid crystal stationary phases depend both on the structure of the main chain of the molecule and on the terminal substituents which strongly affect the polarity of the molecules. However, an equally important or even greater effect on the chromatographic properties of liquid crystals is exerted by the lateral substituents. These substituents not only affect the intermolecular reactions between the liquid crystal and the chromatographed substance but also the liquid crystal – liquid crystal interactions. The lateral substituents also affect the...
