La revue : Journal of Materials and Environmental Sciences
Domaine : Materials and Environmental Sciences
Mots Clés : Complexation, Tetracaine hydrochloride, 1H-NMR, β-Cyclodextrin, UV-Visible Spectrophotometry, quantum calculations
Auteur : M.A. Nouairi, T. Fergoug, M. Azayez, H. Boujoures, C. Zelmat, Y.Bouhadda
Issn : ISSN: 2028-2508 Eissn : vol : Volume 8, Num : issue 5, pp : 1589-1598
Date de publication : 2016-10-04
Résume : The complexation of the drug Tetracaine-hydrochloride (TC,HCl) with β-
cyclodextrin (β-CD) was studied by means of UV-Visible Spectrophotometry and
positive electrospray ionization mass spectrometry ESI+/MS and 1D 1H-NMR. The
experimental results confirm that an inclusion complex was formed between the drug
and β-CD and that the cationic end of the guest molecule is inserted into β-CD cavity.
Quantum semi-empirical calculations were performed to determine the best inclusion
pathway between the cationic Tetracaine and the β-CD. Potential energy scan
showed that the most stable inclusion complex is obtained when the guest molecule
is inserted with its ammonium group into the cavity of β-CD from its wider rim in
accordance to experimental results.
