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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 34, Number 7
BKCSDE 34(7)
July 20, 2013 

 
Title
Synthesis and Characterization of Cationic and Anionic Cyclodextrin Oligomers and Their Use in Layer-by-Layer Film Formation
Author
Sung Yun Yang*, Rekha Hoonor, Hye-Seung Jin, Jeongkwon Kim
Keywords
Cyclodextrin polymer, Polycondensation, Cyclodextrin oligomer, MALDI-TOF, Layer-by-Layer film
Abstract
Ionically modified β-cyclodextrins, which have excellent water-solubility, have been interested in purification technology as well as drug carrier system. The present study summarizes the synthesis and characterization of cationic and anionic β-cyclodextrin (β-CyD) products using by polycondensation. The oligo (β-CyD)s are synthesized from β-CyD, epichlorohydrin (EP) and choline chloride (CC; for cationic polymer) or chloroacetic acid (CAA; for anionic polymer) through one step polycondenstaion process. Unlike the previous studies, we successfully purified the ionic β-CyD condensation products from the β-CyD reaction mixtures and accomplished a great level of structural analysis. The detailed structural analysis of these ionic β-CyD compounds is done by 1H NMR, MALDI-TOF as well as GPC analysis and confirms the formation of oligomers with a few units of β-CyD. We found that the sequence of reactant addition also could effect on the molecular weight of the resulting product as well as the molar ratio of the reactants. Finally, we used the cationic and anionic β-CyD oligomers for fabricating multilayer films by layer-layer process.
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2016 - 2022
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