caa a22 4500 44532810X CHVBK 20180317142728.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10953-011-9660-z doi (NATIONALLICENCE)springer-10.1007/s10953-011-9660-z Intermolecular Complexation Between p-Sulfonated Calix[4,6,8]arene Sodium and Neutral Red [Elektronische Daten] [M. Chen, G. Diao] The inclusion complexation behavior of the dye guest molecule neutral red with three kinds of water-soluble p-sulfonated calix[n]arene sodium (n=4,6,8) was investigated. p-Sulfonated calix[4,6,8]arene sodium (pSC4, pSC6, pSC8) can react with neutral red to form inclusion complexes, which were confirmed by UV-vis absorption and fluorescence spectroscopy. Fluorescence spectroscopy experiments were performed in pH=4.6 acetic buffer solutions at 25 °C to calculate the stability constants (K S) for the stoichiometric 1:1 inclusion complexes of pSC4, pSC6 and pSC8 with neutral red. The thermodynamic parameters for the inclusion complexes were determined through a van't Hoff analysis. Formation of the inclusion complexes of pSC4, pSC6 and pSC8 with neutral red was driven by favorable enthalpic changes with their accompanying negative entropy changes. The complex stability constants monotonically increased with the number of phenolic units in the calixarene ring, which was attributed mainly to electrostatic interactions and hydrogen bonding, rather than to the cavity size. Springer Science+Business Media, LLC, 2011 p-Sulfonated calix[4,6,8]arene sodium nationallicence Neutral red nationallicence Stability constants nationallicence Inclusion complex nationallicence Thermodynamics parameters nationallicence Chen M. College of Chemistry and Chemical Engineering, Yangzhou University, 225002, Yangzhou, P.R. China aut Diao G. College of Chemistry and Chemical Engineering, Yangzhou University, 225002, Yangzhou, P.R. China aut Journal of Solution Chemistry Springer US; http://www.springer-ny.com 40/3(2011-03-01), 481-491 0095-9782 40:3<481 2011 40 10953 https://doi.org/10.1007/s10953-011-9660-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10953-011-9660-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Chen M. College of Chemistry and Chemical Engineering, Yangzhou University, 225002, Yangzhou, P.R. China aut NATIONALLICENCE 700 1- Diao G. College of Chemistry and Chemical Engineering, Yangzhou University, 225002, Yangzhou, P.R. China aut NATIONALLICENCE 773 0- Journal of Solution Chemistry Springer US; http://www.springer-ny.com 40/3(2011-03-01), 481-491 0095-9782 40:3<481 2011 40 10953 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer