synthesis and characterization of the inclusion complex of dicationic ionic liquid and β-cyclodextrin合成和表征dicationic包含复杂的离子液体和β-cyclodextrin.pdf

Int. J. Mol. Sci. 2010, 11, 3675-3685; doi:10.3390/ijm OPEN ACCESS International Journal of Molecular Sciences ISSN 1422-0067 /journal/ijms Article Synthesis and Characterization of the Inclusion Complex of Dicationic Ionic Liquid and β-Cyclodextrin Puvaneswary Subramaniam *, Sharifah Mohamad and Yatimah Alias University of Malaya Centre for Ionic Liquids, Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia; E-Mails: sharifahm@.my (S.M.); yatimah70@.my (Y.A.) * Author to whom correspondence should be addressed; E-Mail: puvanes5881@; Tel.: +603-7967-6774; Fax: +603-7967-4188. Received: 18 August 2010; in revised form: 27 August 2010 / Accepted: 27 September 2010 / Published: 28 September 2010 Abstract: The supramolecular structure of the inclusion complex of β-cyclodextrin (β-CD) with 1,1’,2,2’-tetramethyl-3,3’-(p -phenylenedimethylene) diimidazolium dibromide (TetraPhimBr), a dicationic ionic liquid, has been investigated. The inclusion complex with 1:1 molar ratio was prepared by a kneading method. Fourier transform infrared spectroscopy (FTIR), powder X-ray diffraction (XRD) analysis, 1H NMR and thermogravimetric analysis (TGA) confirmed the formation of the inclusion complex. The results showed that the host-guest system is a fine crystalline powder. The decomposition temperature of the inclusion complex is lower t