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Liquid Crystals as Stationary Phases in Chromatography

The most correct analysis of the compositions of diverse analytes mixtures is significant for analytical studies in different fields; however, many prevalent analytes cannot be identified employing traditional partition gas chromatographic methods. Thus, the increasing requirements on analytes of is...

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Autores principales: Grajek, H., Witkiewicz, Z., Purchała, M., Drzewiński, W.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Springer Berlin Heidelberg 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5039231/
https://www.ncbi.nlm.nih.gov/pubmed/27738351
http://dx.doi.org/10.1007/s10337-016-3154-5
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author Grajek, H.
Witkiewicz, Z.
Purchała, M.
Drzewiński, W.
author_facet Grajek, H.
Witkiewicz, Z.
Purchała, M.
Drzewiński, W.
author_sort Grajek, H.
collection PubMed
description The most correct analysis of the compositions of diverse analytes mixtures is significant for analytical studies in different fields; however, many prevalent analytes cannot be identified employing traditional partition gas chromatographic methods. Thus, the increasing requirements on analytes of isomeric compounds and the problems encountered in their separation demand a study of more diverse analytical systems which are characterised by higher selectivity. Therefore, the selectivity and polarities of various liquid crystals (rod-like, banana-shape, biforked, oxygen, sulphur, nitrogen, and metal containing molecules, Schiff-base, and polymeric dendrimers) employed as liquid crystalline stationary phases (LCSPs) have been discussed from both points of views, namely, their analytical applications and thermodynamic characteristics of infinitely diluted probes with different acceptor–donor properties. Extreme particular effort has been paid to the different interdependencies between the bound up chemical structures of liquid crystal molecules with their different acceptor–donor properties and the connected resolution capabilities in the interpretation of the probe—LCSP systems, on the basis of the [Formula: see text] and [Formula: see text] dependencies, with regard to the LCSP compositions, which have been controlled by the counterbalancing of the enthalpy and entropy factors. The properties of binary systems composed of liquid crystalline poly(propyleneimine) dendrimers—rod-like molecules of liquid crystals and effects of the dendrimer structure, the chemical nature, and molecular size of the non-mesogens on the ability to dissolve in the liquid crystalline phases, have been interpreted. Practical applications of metallomesogenes and chiral stationary phases for analytical separation of different organic substances have also been taken into consideration.
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spelling pubmed-50392312016-10-11 Liquid Crystals as Stationary Phases in Chromatography Grajek, H. Witkiewicz, Z. Purchała, M. Drzewiński, W. Chromatographia Review The most correct analysis of the compositions of diverse analytes mixtures is significant for analytical studies in different fields; however, many prevalent analytes cannot be identified employing traditional partition gas chromatographic methods. Thus, the increasing requirements on analytes of isomeric compounds and the problems encountered in their separation demand a study of more diverse analytical systems which are characterised by higher selectivity. Therefore, the selectivity and polarities of various liquid crystals (rod-like, banana-shape, biforked, oxygen, sulphur, nitrogen, and metal containing molecules, Schiff-base, and polymeric dendrimers) employed as liquid crystalline stationary phases (LCSPs) have been discussed from both points of views, namely, their analytical applications and thermodynamic characteristics of infinitely diluted probes with different acceptor–donor properties. Extreme particular effort has been paid to the different interdependencies between the bound up chemical structures of liquid crystal molecules with their different acceptor–donor properties and the connected resolution capabilities in the interpretation of the probe—LCSP systems, on the basis of the [Formula: see text] and [Formula: see text] dependencies, with regard to the LCSP compositions, which have been controlled by the counterbalancing of the enthalpy and entropy factors. The properties of binary systems composed of liquid crystalline poly(propyleneimine) dendrimers—rod-like molecules of liquid crystals and effects of the dendrimer structure, the chemical nature, and molecular size of the non-mesogens on the ability to dissolve in the liquid crystalline phases, have been interpreted. Practical applications of metallomesogenes and chiral stationary phases for analytical separation of different organic substances have also been taken into consideration. Springer Berlin Heidelberg 2016-08-13 2016 /pmc/articles/PMC5039231/ /pubmed/27738351 http://dx.doi.org/10.1007/s10337-016-3154-5 Text en © The Author(s) 2016 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
spellingShingle Review
Grajek, H.
Witkiewicz, Z.
Purchała, M.
Drzewiński, W.
Liquid Crystals as Stationary Phases in Chromatography
title Liquid Crystals as Stationary Phases in Chromatography
title_full Liquid Crystals as Stationary Phases in Chromatography
title_fullStr Liquid Crystals as Stationary Phases in Chromatography
title_full_unstemmed Liquid Crystals as Stationary Phases in Chromatography
title_short Liquid Crystals as Stationary Phases in Chromatography
title_sort liquid crystals as stationary phases in chromatography
topic Review
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5039231/
https://www.ncbi.nlm.nih.gov/pubmed/27738351
http://dx.doi.org/10.1007/s10337-016-3154-5
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