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12 results on '"Budziak-Wieczorek, Iwona"'

3. Cooperativity of ESPT and Aggregation-Induced Emission Effects—An Experimental and Theoretical Analysis of a 1,3,4-Thiadiazole Derivative

Author

Budziak-Wieczorek, Iwona, primary, Kaczmarczyk, Dominika, additional, Rząd, Klaudia, additional, Gagoś, Mariusz, additional, Stepulak, Andrzej, additional, Myśliwa-Kurdziel, Beata, additional, Karcz, Dariusz, additional, Starzak, Karolina, additional, Burdziński, Gotard, additional, Srebro-Hooper, Monika, additional, and Matwijczuk, Arkadiusz, additional

Published
2024
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5. Evaluation of the Quality of Selected White and Red Wines Produced from Moravia Region of Czech Republic Using Physicochemical Analysis, FTIR Infrared Spectroscopy and Chemometric Techniques

Author

Budziak-Wieczorek, Iwona, primary, Mašán, Vladimír, additional, Rząd, Klaudia, additional, Gładyszewska, Bożena, additional, Karcz, Dariusz, additional, Burg, Patrik, additional, Čížková, Alice, additional, Gagoś, Mariusz, additional, and Matwijczuk, Arkadiusz, additional

Published
2023
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9. Physical Properties, Spectroscopic, Microscopic, X-ray, and Chemometric Analysis of Starch Films Enriched with Selected Functional Additives

Author

Combrzyński, Maciej, primary, Oniszczuk, Tomasz, additional, Kupryaniuk, Karol, additional, Wójtowicz, Agnieszka, additional, Mitrus, Marcin, additional, Milanowski, Marek, additional, Soja, Jakub, additional, Budziak-Wieczorek, Iwona, additional, Karcz, Dariusz, additional, Kamiński, Daniel, additional, Kulesza, Sławomir, additional, Wojtunik-Kulesza, Karolina, additional, Kasprzak-Drozd, Kamila, additional, Gancarz, Marek, additional, Kowalska, Iwona, additional, Ślusarczyk, Lidia, additional, and Matwijczuk, Arkadiusz, additional

Published
2021
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12. Synthesis and Characterization of a (-)-Epicatechin and Barbituric Acid Cocrystal: Single-Crystal X-ray Diffraction and Vibrational Spectroscopic Studies.

Author

Budziak-Wieczorek I and Maciołek U

Abstract

The paper presents the contribution of the cocrystallization method in the physicochemical modification of catechins that exhibit low oral bioavailability. This was done to obtain cocrystals for two naturally occurring polyphenolic diastereoisomers (+)-catechin and (-)-epicatechin with commonly used coformers. Due to distinct crystallization behavior, only the (-)-epicatechin cocrystal with barbituric acid in a 1:1 stoichiometry was obtained. The cocrystal of (-)-epicatechin (EC) with barbituric acid (BTA) was prepared by the slow solvent-evaporation technique. The structure and intermolecular interactions were determined by X-ray crystallographic techniques. The analysis of packing and interactions in the crystal lattice revealed that molecules in the target cocrystal were packed into tapes, formed by the O-H···O type contacts between the (-)-epicatechin and coformer molecules. The EC molecules interact with the carboxyl group in the BTA coformer mainly by -OH groups from the benzene ring A. The cocrystalline phase constituents were also investigated in terms of Hirshfeld surfaces. The application of Raman spectroscopy confirmed the involvement of the C=O group in the formation of hydrogen bonds between the (-)-epicatechin and barbituric acid molecules. Additionally, the solubility studies of pure EC and the EC-BTA cocrystal exhibited minor enhancement of EC solubility in the buffer solution, and pH measurements confirmed a stable level of solubility for EC and its cocrystal., Competing Interests: The authors declare no competing financial interest., (© 2021 The Authors. Published by American Chemical Society.)

Published
2021
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