skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: A Uranyl Peroxide Dimer in the Gas Phase

Journal Article · · Inorganic Chemistry

For this study, the gas-phase uranyl peroxide dimer, [(UO2)2(O2)(L)2]2+ where L = 2,2'-trifluoroethylazanediyl)bis(N,N'-dimethylacetamide), was synthesized by electrospray ionization of a solution of UO22+ and L. Collision-induced dissociation of this dimer resulted in endothermic O atom elimination to give [(UO2)2(O)(L)2]2+, which was found to spontaneously react with water via exothermic hydrolytic chemisorption to yield [(UO2)2(OH)2(L)2]2+. Density functional theory computations of the energies for the gas-phase reactions are in accord with observations. The structures of the observed uranyl dimer were computed, with that of the peroxide of particular interest, as a basis to evaluate the formation of condensed phase uranyl peroxides with bent structures. The computed dihedral angle in [(UO2)2(O2)(L)2]2+ is 145°, indicating a substantial deviation from the planar structure with a dihedral angle of 180°. Energies needed to induce bending in the most elementary gas-phase uranyl peroxide complex, [(UO2)2(O2)]2+, were computed. It was found that bending from the lowest-energy planar structure to dihedral angles up to 140° required energies of <10 kJ/mol. The gas-phase results demonstrate the inherent stability of the uranyl peroxide moiety and support the notion that the uranyl-peroxide-uranyl structural unit is intrinsically planar, with only minor energy perturbations needed to form the bent structures found in studtite and uranyl peroxide nanostructures.

Research Organization:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC02-05CH11231
OSTI ID:
1436151
Journal Information:
Inorganic Chemistry, Vol. 56, Issue 7; ISSN 0020-1669
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 9 works
Citation information provided by
Web of Science

References (54)

Studtite, [(UO 2 )(O 2 )(H 2 O) 2 ](H 2 O) 2 : The first structure of a peroxide mineral journal July 2003
Actinyl Peroxide Nanospheres journal March 2005
Uranyl−Peroxide Interactions Favor Nanocluster Self-Assembly journal November 2009
Uranium Pyrophosphate/Methylenediphosphonate Polyoxometalate Cage Clusters journal September 2010
Complex Nanoscale Cage Clusters Built from Uranyl Polyhedra and Phosphate Tetrahedra journal June 2011
Time-Resolved Self-Assembly of a Fullerene-Topology Core–Shell Cluster Containing 68 Uranyl Polyhedra journal January 2012
Clusters of Actinides with Oxide, Peroxide, or Hydroxide Bridges journal October 2012
Expanding the Crystal Chemistry of Uranyl Peroxides: Four Hybrid Uranyl-Peroxide Structures Containing EDTA journal October 2014
C60: Buckminsterfullerene journal November 1985
Processing used nuclear fuel with nanoscale control of uranium and ultrafiltration journal May 2016
Uranyl peroxide enhanced nuclear fuel corrosion in seawater journal January 2012
Understanding the Structure and Formation of Uranyl Peroxide Nanoclusters by Quantum Chemical Calculations journal October 2010
On the Origin of the Cation Templated Self-Assembly of Uranyl-Peroxide Nanoclusters journal December 2010
Uranyl-Peroxide Nanocapsules: Electronic Structure and Cation Complexation in [(UO 2 ) 20 (μ-O 2 ) 30 ] 20– journal March 2012
A Journey inside the U28 Nanocapsule journal May 2012
Structure of a uranyl peroxo complex in aqueous solution from first-principles molecular dynamics simulations journal January 2014
Uranyl–Peroxide Nanocapsules in Aqueous Solution: Force Field Development and First Applications journal October 2014
Cation Templating and Electronic Structure Effects in Uranyl Cage Clusters Probed by the Isolation of Peroxide-Bridged Uranyl Dimers journal April 2015
Alkali-metal ion coordination in uranyl( vi ) poly-peroxide complexes in solution. Part 1: the Li + , Na + and K + – peroxide–hydroxide systems journal January 2015
Self-Assembly of Uranyl-Peroxide Nanocapsules in Basic Peroxidic Environments journal May 2016
Uranyl complexes with the pyridine-2,6-dicarboxylato ligand: new dinuclear species with μ-η2,η2-peroxide, μ2-hydroxide or μ2-methoxide bridges journal January 2005
Expanding the Crystal Chemistry of Uranyl Peroxides:  Synthesis and Structures of Di- and Triperoxodioxouranium(VI) Complexes journal April 2007
The crystal and molecular structure of sodium uranyl triperoxide journal January 1968
Expanding the Crystal Chemistry of Actinyl Peroxides: μ-η 21 Peroxide Coordination in Trimers of U 6+ Polyhedra journal February 2009
First Identification and Thermodynamic Characterization of the Ternary U(VI) Species, UO 2 (O 2 )(CO 3 ) 2 4− , in UO 2 −H 2 O 2 −K 2 CO 3 Solutions journal March 2008
The 3D quadrupole ion trap mass spectrometer as a complete chemical laboratory for fundamental gas-phase studies of metal mediated chemistry journal January 2006
Gas-Phase Catalysis by Atomic and Cluster Metal Ions: The Ultimate Single-Site Catalysts journal March 2005
Thermodynamic study of the complexation between Nd 3+ and functionalized diacetamide ligands in solution journal January 2016
A Tetrapositive Metal Ion in the Gas Phase: Thorium(IV) Coordinated by Neutral Tridentate Ligands journal May 2013
Infrared Multiphoton Dissociation Spectroscopy of a Gas-Phase Complex of Uranyl and 3-Oxa-Glutaramide: An Extreme Red-Shift of the [O═U═O] 2+ Asymmetric Stretch journal March 2015
Single-Atom Ligand Changes Affect Breathing in an Extended Metal–Organic Framework journal April 2012
Formation and Characterization of the Uranyl–SO 2 Complex, UO 2 (CH 3 SO 2 )(SO 2 ) journal January 2013
Electron transfer dissociation of dipositive uranyl and plutonyl coordination complexes: ETD of Uranyl/Plutonyl Complexes journal December 2011
Estimation of effective ion temperatures in a quadrupole ion trap journal August 1998
Gas-Phase Uranyl, Neptunyl, and Plutonyl: Hydration and Oxidation Studied by Experiment and Theory journal June 2012
Density‐functional thermochemistry. III. The role of exact exchange journal April 1993
Development of the Colle-Salvetti correlation-energy formula into a functional of the electron density journal January 1988
Energy‐adjusted pseudopotentials for the actinides. Parameter sets and test calculations for thorium and thorium monoxide journal May 1994
Valence basis sets for relativistic energy-consistent small-core actinide pseudopotentials journal January 2003
A consistent and accurate ab initio parametrization of density functional dispersion correction (DFT-D) for the 94 elements H-Pu journal April 2010
Gaussian basis sets for use in correlated molecular calculations. I. The atoms boron through neon and hydrogen journal January 1989
Intermolecular interactions from a natural bond orbital, donor-acceptor viewpoint journal September 1988
Application of the pople-santry-segal CNDO method to the cyclopropylcarbinyl and cyclobutyl cation and to bicyclobutane journal January 1968
Hydration Enthalpies of Ba 2+ (H 2 O) x , x = 1–8: A Threshold Collision-Induced Dissociation and Computational Investigation journal April 2015
Formation of hydrated triply charged metal ions from aqueous solutions using nanodrop mass spectrometry journal July 2006
Solubility of Oxygen and Nitrogen in Organic Solvents from —25° to 50° C. journal May 1946
Imidazole and imidazolium porphyrins: gas-phase chemistry of multicharged ions: Porphyrin derivatives: multicharged ions journal April 2014
Physical Characterization and Reactivity of the Uranyl Peroxide [UO 22 -O 2 )(H 2 O) 2 ]·2H 2 O: Implications for Storage of Spent Nuclear Fuels journal July 2012
Photochemical Water Oxidation and Origin of Nonaqueous Uranyl Peroxide Complexes journal March 2014
Pulse radiolysis studies of uranium(VI), neptunium(VI), neptunium(V), and plutonium(VI) in aqueous perchlorate media journal July 1976
Halide Abstraction from Halogenated Acetate Ligands by Actinyls: A Competition between Bond Breaking and Bond Making journal March 2015
Two-Electron Three-Centered Bond in Side-On (η 2 ) Uranyl(V) Superoxo Complexes journal July 2008
Addition of H 2 O and O 2 to Acetone and Dimethylsulfoxide Ligated Uranyl(V) Dioxocations journal March 2009
Water-soluble multi-cage super tetrahedral uranyl peroxide phosphate clusters journal January 2014

Cited By (2)

Structural and computational characterization of a bridging zwitterionic-amidoxime uranyl complex journal January 2019
Performance of group additivity methods for predicting the stability of uranyl complexes journal January 2020