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Title: Spectroscopic and Computational Characterization of Diethylenetriaminepentaacetic Acid/Transplutonium Chelates: Evidencing Heterogeneity in the Heavy Actinide(III) Series

Abstract

Abstract The chemistry of trivalent transplutonium ions (Am 3+ , Cm 3+ , Bk 3+ , Cf 3+ , Es 3+ …) is usually perceived as monotonic and paralleling that of the trivalent lanthanide series. Herein, we present the first extended X‐ray absorption fine structure (EXAFS) study performed on a series of aqueous heavy actinide chelates, extending past Cm. The results obtained on diethylenetriaminepentaacetic acid (DTPA) complexes of trivalent Am, Cm, Bk, and Cf show a break to much shorter metal–oxygen nearest‐neighbor bond lengths in the case of Cf 3+ . Corroborating those results, density functional theory calculations, extended to Es 3+ , suggest that the shorter Cf−O and Es−O bonds could arise from the departure of the coordinated water molecule and contraction of the ligand around the metal relative to the other [M III DTPA(H 2 O)] 2− (M=Am, Cm, Bk) complexes. Taken together, these experimental and theoretical results demonstrate inhomogeneity within the trivalent transplutonium series that has been insinuated and debated in recent years, and that may also be leveraged for future nuclear waste reprocessing technologies.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2];  [2]; ORCiD logo [2]; ORCiD logo [1]; ORCiD logo [3]
  1. Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA
  2. Theoretical Division Los Alamos National Laboratory Los Alamos NM 87545 USA
  3. Chemical Sciences Division Lawrence Berkeley National Laboratory Berkeley CA 94720 USA, Department of Nuclear Engineering University of California, Berkeley Berkeley CA 94720 USA
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
1433275
Resource Type:
Publisher's Accepted Manuscript
Journal Name:
Angewandte Chemie
Additional Journal Information:
Journal Name: Angewandte Chemie Journal Volume: 130 Journal Issue: 17; Journal ID: ISSN 0044-8249
Publisher:
Wiley Blackwell (John Wiley & Sons)
Country of Publication:
Germany
Language:
English

Citation Formats

Deblonde, Gauthier J. ‐P., Kelley, Morgan P., Su, Jing, Batista, Enrique R., Yang, Ping, Booth, Corwin H., and Abergel, Rebecca J. Spectroscopic and Computational Characterization of Diethylenetriaminepentaacetic Acid/Transplutonium Chelates: Evidencing Heterogeneity in the Heavy Actinide(III) Series. Germany: N. p., 2018. Web. doi:10.1002/ange.201709183.
Deblonde, Gauthier J. ‐P., Kelley, Morgan P., Su, Jing, Batista, Enrique R., Yang, Ping, Booth, Corwin H., & Abergel, Rebecca J. Spectroscopic and Computational Characterization of Diethylenetriaminepentaacetic Acid/Transplutonium Chelates: Evidencing Heterogeneity in the Heavy Actinide(III) Series. Germany. https://doi.org/10.1002/ange.201709183
Deblonde, Gauthier J. ‐P., Kelley, Morgan P., Su, Jing, Batista, Enrique R., Yang, Ping, Booth, Corwin H., and Abergel, Rebecca J. Wed . "Spectroscopic and Computational Characterization of Diethylenetriaminepentaacetic Acid/Transplutonium Chelates: Evidencing Heterogeneity in the Heavy Actinide(III) Series". Germany. https://doi.org/10.1002/ange.201709183.
@article{osti_1433275,
title = {Spectroscopic and Computational Characterization of Diethylenetriaminepentaacetic Acid/Transplutonium Chelates: Evidencing Heterogeneity in the Heavy Actinide(III) Series},
author = {Deblonde, Gauthier J. ‐P. and Kelley, Morgan P. and Su, Jing and Batista, Enrique R. and Yang, Ping and Booth, Corwin H. and Abergel, Rebecca J.},
abstractNote = {Abstract The chemistry of trivalent transplutonium ions (Am 3+ , Cm 3+ , Bk 3+ , Cf 3+ , Es 3+ …) is usually perceived as monotonic and paralleling that of the trivalent lanthanide series. Herein, we present the first extended X‐ray absorption fine structure (EXAFS) study performed on a series of aqueous heavy actinide chelates, extending past Cm. The results obtained on diethylenetriaminepentaacetic acid (DTPA) complexes of trivalent Am, Cm, Bk, and Cf show a break to much shorter metal–oxygen nearest‐neighbor bond lengths in the case of Cf 3+ . Corroborating those results, density functional theory calculations, extended to Es 3+ , suggest that the shorter Cf−O and Es−O bonds could arise from the departure of the coordinated water molecule and contraction of the ligand around the metal relative to the other [M III DTPA(H 2 O)] 2− (M=Am, Cm, Bk) complexes. Taken together, these experimental and theoretical results demonstrate inhomogeneity within the trivalent transplutonium series that has been insinuated and debated in recent years, and that may also be leveraged for future nuclear waste reprocessing technologies.},
doi = {10.1002/ange.201709183},
journal = {Angewandte Chemie},
number = 17,
volume = 130,
place = {Germany},
year = {Wed Mar 14 00:00:00 EDT 2018},
month = {Wed Mar 14 00:00:00 EDT 2018}
}

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