| Title: | Model for the description of interactions between ellagitannins and Fe(II) ions |
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| Authors: | ID Frešer, Franjo (Author)
ID Hostnik, Gregor (Author)
ID Bren, Urban (Author) |
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| Files: |  s41598-026-37616-6_(1).pdf (2,63 MB)
MD5: BF7F5F9C526AF034C8A560699AD93E57
 https://www.nature.com/articles/s41598-026-37616-6
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
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| Abstract: | A growing problem in agriculture is the increasing resistance of bacteria to antibiotics used in animal feed. The strong antibacterial activity of tannins, plant polyphenols that can chelate metal ions, makes them one of the potential antibiotic substitutes. The present study investigates the chelation of Fe(II) ions by roburins A and D, ellagitannins isolated from aqueous chestnut wood extract, which is currently used as an antibacterial additive in animal feed. A combination of previously determined stoichiometries and the microscopic protolytic equilibrium of ellagitannins enabled the development of a model describing the contribution of the structural elements NHTP and HHDP to Fe(II) chelation. The parameters obtained from the fit to the experimental Job plots were used to calculate the model Job curves for the roburins. The good agreement between the experimental and model curves confirms the suitability of the model and shows its predictive power in determining the binding stoichiometries and the degree of Fe(II) chelation. |
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| Keywords: | ellagitannins, Fe(II) ions chelation, UV-Vis spectroscopy, Job’s method, chelation mechanism, model fitting |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 19.08.2025 |
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| Article acceptance date: | 23.01.2026 |
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| Publication date: | 29.01.2026 |
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| Publisher: | Nature Publishing Group |
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| Year of publishing: | 2026 |
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| Number of pages: | 17 str. |
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| PID: | 20.500.12556/DKUM-96917  |
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| UDC: | 54 |
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| ISSN on article: | 2045-2322 |
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| COBISS.SI-ID: | 266769923 |
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| DOI: | 10.1038/s41598-026-37616-6 |
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| Copyright: | © The Author(s) 2026. |
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| Publication date in DKUM: | 02.02.2026 |
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| Views: | 165 |
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| Downloads: | 11 |
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| Metadata: |    |
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| Categories: | Misc.
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