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Reactions of ligands from BT(B)P family with solvated electrons and benzophenone ketyl radicals in 1-octanol solutions. Pulse radiolysis study

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Abstract

Pulse radiolysis involving reactions of solvated electrons and benzophenone ketyl radicals in 1-octanol with selected compounds from bis-triazinyl pyridines and bis-triazinyl bipyridines, BT(B)P family, developed for extraction of trivalent actinides have been studied. The designated ligands were: 2,6-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-benzo-[1,2,4]triazin-3-yl)pyridine, 6,6′-bis(5,5,8,8-tetramethyl-5,6,7,8-tetrahydro-benzo-[1,2,4-]triazin-3-yl)-[2,2′]bipyridine, 6,6′-bis(5,6-diethyl-[1,2,4]triazin-3-yl)-[2,2′]bipyridine and 6,6′-bis(5,6-dipentyl-[1,2,4]triazin-3-yl)-[2,2′]bipyridine. Reactions of the ligands with solvated electrons in 1-octanol are fast. The rate constants were determined as equal to: \( k_{{{\text{CyMe}}_{4} {\text{BTP}}}} . \) = (2.4 ± 0.2) × 109 dm3 mol−1 s−1, \( k_{{{\text{CyMe}}_{ 4} {\text{BTBP}}}} \) = (1.7 ± 0.3) × 109 dm3 mol−1 s−1, \( k_{{{\text{C}}_{ 2} {\text{BTBP}}}} \) = (1.3 ± 0.3) × 109 dm3 mol−1 s−1 and \( k_{{{\text{C}}_{ 5} {\text{BTBP}}}} \) = (1.7 ± 0.3) × 109 dm3 mol−1 s−1. Reactions of the ligands with benzophenone ketyl radicals are much slower and the measured rate constants were as follows: \( k_{{{\text{CyMe}}_{ 4} {\text{BTP}}}} \) = 6.7 × 107 dm3 mol−1 s−1 and \( k_{{{\text{CyMe}}_{ 4} {\text{BTBP}}}} \) = 3.2 × 107 dm3 mol−1 s−1.

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Acknowledgments

Financial support for this research was provided by the European Commission (project: Actinide reCycling by SEParation and Transmutation, ACSEPT—Collaborative Project of the EC FP7-Euroatom, No. 211267. Authors thank Prof. Mark R. St. J. Foreman from Department of Chemical and Biological Engineering, Chalmers University of Technology, Göteborg, Sweden for donating synthesized ligands.

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  1. Centre for Radiation Research and Technology, Institute of Nuclear Chemistry and Technology, Dorodna 16, 03-195, Warsaw, Poland

    A. Sulich, J. Grodkowski, J. Mirkowski & R. Kocia

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  1. A. Sulich
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  2. J. Grodkowski
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  3. J. Mirkowski
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  4. R. Kocia
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Correspondence to J. Grodkowski.

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Sulich, A., Grodkowski, J., Mirkowski, J. et al. Reactions of ligands from BT(B)P family with solvated electrons and benzophenone ketyl radicals in 1-octanol solutions. Pulse radiolysis study. J Radioanal Nucl Chem 300, 415–421 (2014). https://doi.org/10.1007/s10967-014-3021-5

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