Synthesis of modified β-cyclodextrin polymers and characterization of their fuchsin adsorption

Three water insoluble β-cyclodextrin polymers HP-β-CDP, CM-β-CDP and AE-β-CDP were synthesized by cross-linking epoxychloropropane with corresponding β-CD derivatives and utilized to adsorb water-soluble dye fuchsin from aqueous solution. FT-IR spectra confirmed the existence of hydroxypropyl, carbo...

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Bibliographic Details
Published in:Journal of Inclusion Phenomena and Macrocyclic Chemistry 2012-02, Vol.72 (1-2), p.165-171
Main Authors: Zhang, Xiao Mei, Peng, Cheng Song, Xu, Guo Cai
Format: Article
Language:English
Subjects:
Chemistry
Chemistry and Materials Science
Crystallography and Scattering Methods
Food Science
Organic Chemistry
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Summary:Three water insoluble β-cyclodextrin polymers HP-β-CDP, CM-β-CDP and AE-β-CDP were synthesized by cross-linking epoxychloropropane with corresponding β-CD derivatives and utilized to adsorb water-soluble dye fuchsin from aqueous solution. FT-IR spectra confirmed the existence of hydroxypropyl, carboxyl group and amidogen in polymers. The influences of several parameters (contact time, pH and temperature) and the degree of substitution (DS) of CM-β-CDP in range of 1.5–4.5 on the adsorption capacity ( Q e ) were evaluated. The results showed that all maximum Q e of polymers appeared at pH 5.2–5.3. CM-β-CDP with carboxyl group was the most effective extractant, and the Q e of CM-β-CDP with DS 1.5–2.5 kept nearly constant but decreased sharply over 2.5. However, AE-β-CDP with amidogen had displayed a quite low Q e to fuchsin, even lower than that of unmodified β-CD polymer. The preliminary studies on the morphology of both CM-β-CDP and AE-β-CDP by AFM disclosed the differences in topography of their surfaces.
ISSN:0923-0750
1573-1111
DOI:10.1007/s10847-011-9956-z