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Determination of the thermodynamic quantities for complex formation of U(VI) with amino acids by calorimetry
https://repo.qst.go.jp/records/2004662
https://repo.qst.go.jp/records/2004662d14efc52-1c90-41e6-af9d-58098e90704c
| アイテムタイプ | 学術雑誌論文 / Journal Article(1) | |||||||||||||
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| 公開日 | 2025-03-04 | |||||||||||||
| タイトル | ||||||||||||||
| タイトル | Determination of the thermodynamic quantities for complex formation of U(VI) with amino acids by calorimetry | |||||||||||||
| 言語 | en | |||||||||||||
| 言語 | ||||||||||||||
| 言語 | eng | |||||||||||||
| 資源タイプ | ||||||||||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||||||||||
| 資源タイプ | journal article | |||||||||||||
| 著者 |
Akira Kirishima
× Akira Kirishima
× Masahide Takei
× Uehara Akihiro
× Daisuke Akiyama
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| 抄録 | ||||||||||||||
| 内容記述タイプ | Abstract | |||||||||||||
| 内容記述 | As part of a comprehensive study providing a basic chemistry data set for the prediction of the speciation and distribution of ingested or inhaled uranium in the human body, the thermodynamic quantities (ΔG, ΔH, and ΔS) for the formation of U(VI) complexes with three amino acids, L-serine, L(-)-phenylalanine, and L-cysteine were determined. In this study, the stability constants were determined by potentiometric titration and the reaction enthalpies were directly measured by calorimetric titration. Prior to the U(VI) complexation study, the DG, DH, and DS of the protonation of the three amino acids were determined using the same techniques. The obtained thermodynamic quantities are compared to discuss the complex formation's driving forces and mechanism. From the obtained thermodynamic quantities, it was found that U(VI)-L-serine and U(VI)-L(-)-phenylalanine complexes are entropy-driven reactions, whereas a significant enthalpy benefit drives L-cysteine complexation. | |||||||||||||
| 書誌情報 |
The Journal of Chemical Thermodynamics 巻 206, p. 107469, 発行日 2025-02 |
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| DOI | ||||||||||||||
| 識別子タイプ | DOI | |||||||||||||
| 関連識別子 | 10.1016/j.jct.2025.107469 | |||||||||||||
