Cleaving Off Uranyl Oxygens through Chelation: A Mechanistic Study in the Gas Phase
Abstract
Recent efforts to activate the strong uranium-oxygen bonds in the dioxo uranyl cation have been limited to single oxo-group activation through either uranyl reduction and functionalization in solution, or by collision induced dissociation (CID) in the gas-phase, using mass spectrometry (MS). Here, we report and investigate the surprising double activation of uranyl by an organic ligand, 3,4,3-LI(CAM), leading to the formation of a formal U6+ chelate in the gas-phase. The cleavage of both uranyl oxo bonds was experimentally evidence d by CID, using deuterium and 18O isotopic substitutions, and by infrared multiple photon dissociation (IRMPD) spectroscopy. Density functional theory (DFT) computations predict that the overall reaction requires only 132 kJ/mol, with the first oxygen activation entailing about 107 kJ/mol. Here, combined with analysis of similar, but unreactive ligands, these results shed light on the chelation-driven mechanism of uranyl oxo bond cleavage, demonstrating its dependence on the presence of ligand hydroxyl protons available for direct interactions with the uranyl oxygens.
- Authors:
-
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Duquesne Univ., Pittsburgh, PA (United States)
- Radboud Univ., Nijmegen (The Netherlands)
- Radboud Univ., Nijmegen (The Netherlands); Univ. of Amsterdam, Amsterdam (The Netherlands)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1436648
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Inorganic Chemistry
- Additional Journal Information:
- Journal Volume: 56; Journal Issue: 21; Journal ID: ISSN 0020-1669
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Uranyl activation; Actinide chemistry; Gas-phase chemistry; Collision induced dissociation; Uranium chelate
Citation Formats
Abergel, Rebecca J., de Jong, Wibe A., Deblonde, Gauthier J. -P., Dau, Phuong D., Captain, Ilya, Eaton, Teresa M., Jian, Jiwen, van Stipdonk, Michael J., Martens, Jonathan, Berden, Giel, Oomens, Jos, and Gibson, John K. Cleaving Off Uranyl Oxygens through Chelation: A Mechanistic Study in the Gas Phase. United States: N. p., 2017.
Web. doi:10.1021/acs.inorgchem.7b01720.
Abergel, Rebecca J., de Jong, Wibe A., Deblonde, Gauthier J. -P., Dau, Phuong D., Captain, Ilya, Eaton, Teresa M., Jian, Jiwen, van Stipdonk, Michael J., Martens, Jonathan, Berden, Giel, Oomens, Jos, & Gibson, John K. Cleaving Off Uranyl Oxygens through Chelation: A Mechanistic Study in the Gas Phase. United States. https://doi.org/10.1021/acs.inorgchem.7b01720
Abergel, Rebecca J., de Jong, Wibe A., Deblonde, Gauthier J. -P., Dau, Phuong D., Captain, Ilya, Eaton, Teresa M., Jian, Jiwen, van Stipdonk, Michael J., Martens, Jonathan, Berden, Giel, Oomens, Jos, and Gibson, John K. Wed .
"Cleaving Off Uranyl Oxygens through Chelation: A Mechanistic Study in the Gas Phase". United States. https://doi.org/10.1021/acs.inorgchem.7b01720. https://www.osti.gov/servlets/purl/1436648.
@article{osti_1436648,
title = {Cleaving Off Uranyl Oxygens through Chelation: A Mechanistic Study in the Gas Phase},
author = {Abergel, Rebecca J. and de Jong, Wibe A. and Deblonde, Gauthier J. -P. and Dau, Phuong D. and Captain, Ilya and Eaton, Teresa M. and Jian, Jiwen and van Stipdonk, Michael J. and Martens, Jonathan and Berden, Giel and Oomens, Jos and Gibson, John K.},
abstractNote = {Recent efforts to activate the strong uranium-oxygen bonds in the dioxo uranyl cation have been limited to single oxo-group activation through either uranyl reduction and functionalization in solution, or by collision induced dissociation (CID) in the gas-phase, using mass spectrometry (MS). Here, we report and investigate the surprising double activation of uranyl by an organic ligand, 3,4,3-LI(CAM), leading to the formation of a formal U6+ chelate in the gas-phase. The cleavage of both uranyl oxo bonds was experimentally evidence d by CID, using deuterium and 18O isotopic substitutions, and by infrared multiple photon dissociation (IRMPD) spectroscopy. Density functional theory (DFT) computations predict that the overall reaction requires only 132 kJ/mol, with the first oxygen activation entailing about 107 kJ/mol. Here, combined with analysis of similar, but unreactive ligands, these results shed light on the chelation-driven mechanism of uranyl oxo bond cleavage, demonstrating its dependence on the presence of ligand hydroxyl protons available for direct interactions with the uranyl oxygens.},
doi = {10.1021/acs.inorgchem.7b01720},
journal = {Inorganic Chemistry},
number = 21,
volume = 56,
place = {United States},
year = {Wed Oct 11 00:00:00 EDT 2017},
month = {Wed Oct 11 00:00:00 EDT 2017}
}
Web of Science
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