• Journal of Radiation Research and Radiation Processing
  • Vol. 42, Issue 6, 060210 (2024)
Yunjia YANG, Yiqian WU, Jing PENG*, Maolin ZHAI*, and Jiuqiang LI
Author Affiliations
  • Radiochemistry and Radiation Chemistry Key Laboratory of Fundamental Science,Beijing National Laboratory for Molecular Sciences,College of Chemistry and Molecular Engineering,Peking University,Beijing 100871,China
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    DOI: 10.11889/j.1000-3436.2024-0091 Cite this Article
    Yunjia YANG, Yiqian WU, Jing PENG, Maolin ZHAI, Jiuqiang LI. Reaction rate constant of phosphate esters with hydroxyl radicals investigated using fluorescence probe method[J]. Journal of Radiation Research and Radiation Processing, 2024, 42(6): 060210 Copy Citation Text show less

    Abstract

    The strong fluorescence of 7-hydroxycoumarin yielded by the reaction of coumarin with hydroxyl radicals (?OH) was used as a fluorescent probe to determine the yield of 7-hydroxycoumarin aqueous solutions with different concentrations of TBP and TiAP after gamma ray irradiation. The reaction rate constants of TBP and TiAP with ?OH at room temperature were determined via pseudo-first order kinetic fitting (kTBP= (9.0 ± 0.2) ×109 L/(mol·s)and kTiAP= (5.3 ± 0.2) ×109 L/(mol·s)),respectively. Owing to the stronger hydrophobicity of TiAP compared with that of TBP,its reaction rate constant with ?OH is lower than that of TBP,thus resulting in a higher yield of ?OH in the TiAP solution compared to the TBP solution with the same concentration. This study provides a simple,convenient and efficient method for investigating the reactions between extractants and ?OH.
    Yunjia YANG, Yiqian WU, Jing PENG, Maolin ZHAI, Jiuqiang LI. Reaction rate constant of phosphate esters with hydroxyl radicals investigated using fluorescence probe method[J]. Journal of Radiation Research and Radiation Processing, 2024, 42(6): 060210
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