期刊
FOOD CHEMISTRY
卷 212, 期 -, 页码 485-494出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2016.06.013
关键词
CD-MOFs; Curcumin; gamma-Cyclodextrin; Encapsulation; Stability; Spectroscopy
资金
- American University of Beirut, Lebanon through URB
- Kamal A. Shair Research Fund
- Kamal A. Shair Central Research Science Laboratory
Curcumin has been successfully encapsulated in cyclodextrin-metal organic frameworks ( CD-MOFs) without altering their crystallinity. The interaction between curcumin and CD-MOFs is strong through hydrogen bond type interaction between the OH group of cyclodextrin of CD-MOFs and the phenolic hydroxyl group of the curcumin. Interestingly, dissolving the curcumin loaded CD-MOFs crystals in water results in formation of a unique complex between curcumin, gamma CD and potassium cations. In fact, the initial interaction between curcumin and CD-MOF is crucial for the formation of the latter. This new complex formed in alkaline media at pH 11.5 has maximum absorbance at 520 nm and emittance at 600 nm. Most importantly, the stability of curcumin in this complex was enhanced by at least 3 orders of magnitude compared to free curcumin and curcumin: gamma-CD at pH 11.5. These results suggest a promising benign system of CD-MOFs, which can be used to store and stabilize curcumin for food applications. (C) 2016 Elsevier Ltd. All rights reserved.
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