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Conventional Study on Novel Dicationic Ionic Liquid Inclusion with β-Cyclodextrin
University of Malaya Centre for Ionic Liquids, Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia
Advanced Medical & Dental Institute, University of Science Malaysia, No 1–8 (Lot 8), Persiaran Seksyen 4/1, Bandar Putra Bertam, Kepala Batas, Pulau Pinang 13200, Malaysia
* Author to whom correspondence should be addressed.
Received: 27 June 2011; in revised form: 25 August 2011 / Accepted: 25 August 2011 / Published: 23 September 2011
Abstract: This study focuses on the synthesis and characterization of the inclusion complex of β-Cyclodextrin (β-CD) with dicationic ionic liquid, 3,3'-(1,4-Phenylenebis [methylene]) bis(1-methyl-1H-imidazol-3-ium) di(bromide) (PhenmimBr). The inclusion complex was prepared at room temperature utilizing conventional kneading technique. Proton (1H) NMR and 2D (1H–1H) COSY NMR were the primary characterization tools employed to verify the formation of the inclusion complex. COSY spectra showed strong correlations between protons of imidazolium and protons of β-CD which indicates that the imidazolium ring of PhenmimBr has entered the cavity of β-CD. UV absorption indicated that β-CD reacts with PhenmimBr to form a 2:1 β-CD-PhenmimBr complex with an apparent formation constant of 2.61 × 105 mol−2 L2. Other characterization studies such as UV, FT-IR, XRD, TGA, DSC and SEM studies were also used to further support the formation of the β-CD-PhenmimBr inclusion complex.
Keywords: dicationic ionic liquid; cyclodextrin; inclusion complex
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Mohamad, S.; Surikumaran, H.; Raoov, M.; Marimuthu, T.; Chandrasekaram, K.; Subramaniam, P. Conventional Study on Novel Dicationic Ionic Liquid Inclusion with β-Cyclodextrin. Int. J. Mol. Sci. 2011, 12, 6329-6345.
Mohamad S, Surikumaran H, Raoov M, Marimuthu T, Chandrasekaram K, Subramaniam P. Conventional Study on Novel Dicationic Ionic Liquid Inclusion with β-Cyclodextrin. International Journal of Molecular Sciences. 2011; 12(9):6329-6345.
Mohamad, Sharifah; Surikumaran, Hemavathy; Raoov, Muggundha; Marimuthu, Tilagam; Chandrasekaram, Kumuthini; Subramaniam, Puvaneswary. 2011. "Conventional Study on Novel Dicationic Ionic Liquid Inclusion with β-Cyclodextrin." Int. J. Mol. Sci. 12, no. 9: 6329-6345.