caa a22 4500 469059559 CHVBK 20180323132853.0 cr unu---uuuuu 170328e19920701xx s 000 0 eng 10.1007/BF01042787 doi (NATIONALLICENCE)springer-10.1007/BF01042787 Binding forces in complexation of p -alkylphenols with β -cyclodextrin and methylated β -cyclodextrins [Elektronische Daten] [Koji Kano, Yoko Tamiya, Shizunobu Hashimoto] Abstract.: Fluorescence spectroscopy has been used to determine the binding constants (K) for inclusion complexes of six kinds ofp-Akyphenols withβ-cyclodextrin (β-CDx), heptakis(2,6-di-O-methyl)-β-CDx (DMe-β-CDxg), and heptakis(2,3,6-tri-O-methyl)-β-CDx (TMe-β-CDx). The stability of the inclusion complex of each cyclodextrin increases with increasing alkyl chain length of thep-alkylphenol. TheK values decrease in the order of DMe-β-CDx,β-CDx, and TMe-β-CDx for each guest. In complexation of 3-(p-hydroxyphenyl)-1-propanol (3) withβ-CDx as well as with DMe-β-CDx, negative enthalpy (ΔH) and positive entropy changes (ΔS) have been obtained, suggesting both van der Waals and hydrophobic interactions as binding forces. The inclusion of 3 by TMe-β-CDx, however, is an enthalpically favorable but entropically unfavorable process. The van der Waals interactions may be the main binding forces for complexing3 with TMe-β-CDx. Kluwer Academic Publishers, 1992 p -Alkylphenols nationallicence β -cyclodextrin nationallicence methylated β -cyclodextrins nationallicence thermodynamic parameters nationallicence binding forces nationallicence Kano Koji Department of Applied Chemistry, Faculty of Engineering, Doshisha University, 602, Kamikyo-ku, Kyoto, Japan aut Tamiya Yoko Department of Applied Chemistry, Faculty of Engineering, Doshisha University, 602, Kamikyo-ku, Kyoto, Japan aut Hashimoto Shizunobu Department of Applied Chemistry, Faculty of Engineering, Doshisha University, 602, Kamikyo-ku, Kyoto, Japan aut Journal of inclusion phenomena and molecular recognition in chemistry Kluwer Academic Publishers 13/3(1992-07-01), 287-293 0923-0750 13:3<287 1992 13 10847 https://doi.org/10.1007/BF01042787 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01042787 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kano Koji Department of Applied Chemistry, Faculty of Engineering, Doshisha University, 602, Kamikyo-ku, Kyoto, Japan aut NATIONALLICENCE 700 1- Tamiya Yoko Department of Applied Chemistry, Faculty of Engineering, Doshisha University, 602, Kamikyo-ku, Kyoto, Japan aut NATIONALLICENCE 700 1- Hashimoto Shizunobu Department of Applied Chemistry, Faculty of Engineering, Doshisha University, 602, Kamikyo-ku, Kyoto, Japan aut NATIONALLICENCE 773 0- Journal of inclusion phenomena and molecular recognition in chemistry Kluwer Academic Publishers 13/3(1992-07-01), 287-293 0923-0750 13:3<287 1992 13 10847 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer