Lamia Nakhle, Miriana Kfoury, Isabelle Mallard, Hélène Greige-Gerges, David Landy
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Cyclodextrin polymers in combination with water and deep eutectic solvent for the retention of Eucalyptus citriodora essential oil
Eucalyptus citriodora is one of the most widely used essential oils (EOs) because of its various antimicrobial, antioxidant and anti-inflammatory activities. However, its limited aqueous solubility restricts its use. The aim of this study was to develop supramolecular formulations able to retain E. citriodora EO in solution. For this purpose, new cyclodextrin (CD) polymers were synthesized and characterized using gel permeation chromatography, FTIR and NMR spectroscopies. Their retention ability toward E. citriodora in non-conventional green media (deep eutectic solvent (DES):water mixture), more precisely choline chloride:urea DES:water (70:30 wt%), was evaluated and compared to the corresponding native CD [β-cyclodextrin (β-CD)] or CD derivatives [hydroxypropylated-β-cyclodextrin (HP-β-CD) and low methylated-β-cyclodextrin (CRYSMEB)] using static headspace-gas chromatography (SH-GC). All the studied formulations showed a great capacity to retain and reduce the volatility of E. citriodora. The various polymers showed divergent retention efficiencies.
期刊介绍：
The Journal of Inclusion Phenomena and Macrocyclic Chemistry is the premier interdisciplinary publication reporting on original research into all aspects of host-guest systems. Examples of specific areas of interest are: the preparation and characterization of new hosts and new host-guest systems, especially those involving macrocyclic ligands; crystallographic, spectroscopic, thermodynamic and theoretical studies; applications in chromatography and inclusion polymerization; enzyme modelling; molecular recognition and catalysis by inclusion compounds; intercalates in biological and non-biological systems, cyclodextrin complexes and their applications in the agriculture, flavoring, food and pharmaceutical industries; synthesis, characterization and applications of zeolites.
The journal publishes primarily reports of original research and preliminary communications, provided the latter represent a significant advance in the understanding of inclusion science. Critical reviews dealing with recent advances in the field are a periodic feature of the journal.
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