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Probing fluconazole deposition inside mesoporous silica using solid-state NMR spectroscopy : crystallization of a confined metastable form and phase transformations under storage conditions.
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Nowak, Maciej, Dyba, Aleksandra J., Gołkowska, Anna M., Nieckarz, Aleksandra, Krajewska, Karolina, Malec, Katarzyna, Iuga, Dinu, Karolewicz, Bożena, Khimyak, Yaroslav Z. and Nartowski, Karol P. (2023) Probing fluconazole deposition inside mesoporous silica using solid-state NMR spectroscopy : crystallization of a confined metastable form and phase transformations under storage conditions. International Journal of Pharmaceutics, 645 . 123403. doi:10.1016/j.ijpharm.2023.123403 ISSN 0378-5173.
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Official URL: https://doi.org/10.1016/j.ijpharm.2023.123403
Abstract
Encapsulation of molecules into mesoporous silica carriers continues to attract considerable interest in the area of drug delivery and crystal engineering. Here, MCM-41, SBA-15 and MCF silica matrices were used to encapsulate fluconazole (FLU), a pharmaceutically relevant molecule with known conformational flexibility, using the melting method. The composites have been characterized using H, C and F NMR spectroscopy, nitrogen adsorption, PXRD and thermal analysis (DSC, TGA). Drug loading up to 50 wt% allowed us to probe the crystallization process and to detect different local environments of confined FLU molecules. F NMR spectroscopy enabled us to detect the gradual pore filling of silica with FLU and differentiate the amorphous domains and surface species. The use of the complementary structural and thermal techniques enabled us to monitor crystallization of the metastable FLU form II in MCF. Using H and F NMR spectroscopy we observed pore-size dependent reversible dehydration/hydration behaviour in the MCM and SBA composites. As water content has considerable importance in understanding of physicochemical stability and shelf-life of pharmaceutical formulations, experimental evidence of the effect of API-water-carrier interactions on the API adsorption mechanism on silica surface is highlighted. [Abstract copyright: Copyright © 2023 Elsevier B.V. All rights reserved.]
Item Type: | Journal Article | ||||||||
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Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
SWORD Depositor: | Library Publications Router | ||||||||
Journal or Publication Title: | International Journal of Pharmaceutics | ||||||||
Publisher: | Elsevier Science BV | ||||||||
ISSN: | 0378-5173 | ||||||||
Official Date: | 15 October 2023 | ||||||||
Dates: |
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Volume: | 645 | ||||||||
Article Number: | 123403 | ||||||||
DOI: | 10.1016/j.ijpharm.2023.123403 | ||||||||
Status: | Peer Reviewed | ||||||||
Publication Status: | Published | ||||||||
Reuse Statement (publisher, data, author rights): | . | ||||||||
Access rights to Published version: | Restricted or Subscription Access |
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