1
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Xiao K, Yang Y, Xu X, Szymanowski JES, Zhou Y, Sigmon GE, Burns PC, Liu T. Coacervate Formation in Dilute Aqueous Solutions of Inorganic Molecular Clusters with Simple Divalent Countercations. Inorg Chem 2024. [PMID: 39106045 DOI: 10.1021/acs.inorgchem.4c02103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/07/2024]
Abstract
We report a complex coacervate formed by a 2.5 nm-diameter, rigid uranyl peroxide molecular cluster (Li68K12(OH)20)[UO2(O2)OH]60, U6060-) and SrCl2 salt in dilute aqueous solutions, including its location in the phase diagram, composition, rheological features, and critical conditions for phase transitions. In this coacervate, the Sr2+ cations are a major building component, and the coacervate phase covers a substantial region of the phase diagram. This coacervate demonstrates features that differ from traditional coacervates formed by oppositely charged long-chain polyelectrolytes, especially in its formation mechanism, dehydration, enhancement of mechanical strength with increasing ionic strength, and the change of salt partition preference into the coacervate and supernatant phases with ionic strength.
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Affiliation(s)
- Kexing Xiao
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Yuqing Yang
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Xiaohan Xu
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | | | - Yifan Zhou
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | | | | | - Tianbo Liu
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
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2
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Smith KR, Ilavsky J, Hixon AE. Crystallization of a Neptunyl Oxalate Hydrate from Solutions Containing Np V and the Uranyl Peroxide Nanocluster U 60 Ox 30. Chemistry 2023; 29:e202203814. [PMID: 36598408 DOI: 10.1002/chem.202203814] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 01/05/2023]
Abstract
Uranyl peroxide nanoclusters are an evolving family of materials with potential applications throughout the nuclear fuel cycle. While several studies have investigated their interactions with alkali and alkaline earth metals, no studies have probed their interactions with the actinide elements. This work describes a system containing U60 Ox30 , [((UO2 )(O2 ))60 (C2 O4 )30 ]60- , and neptunium(V) as a function of neptunium concentration. Ultra-small and small angle X-ray scattering were used to observe these interactions in the aqueous phase, and X-ray diffraction was used to observe solid products. The results show that neptunium induces aggregation of U60 Ox30 when the neptunium concentration is≤10 mM, whereas (NpO2 )2 C2 O4 ⋅ 6H2 O(cr) and studtite ultimately form at 15-25 mM neptunium. The latter result suggests that neptunium coordinates with the bridging oxalate ligands in U60 Ox30 , leaving metastable uranyl peroxide species in solution. This is an important finding given the potential application of uranyl peroxide nanoclusters in the recycling of used nuclear fuel.
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Affiliation(s)
- Kyson R Smith
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Jan Ilavsky
- X-ray Science Division, Argonne National Laboratory, Argonne, IL, 60439, USA
| | - Amy E Hixon
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA
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3
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Greaves N, Kaltsoyannis N. Computational Study of Very High Spin Actinyl Peroxide Matryoshka Nanoclusters. Eur J Inorg Chem 2022. [DOI: 10.1002/ejic.202200518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Nicholas Greaves
- Department of Chemistry School of Natural Sciences University of Manchester Oxford Road M13 9PL Manchester United Kingdom
| | - Nikolas Kaltsoyannis
- Department of Chemistry School of Natural Sciences University of Manchester Oxford Road M13 9PL Manchester United Kingdom
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4
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Yang Y, Zhou Y, Chen J, Kohlgruber T, Smith T, Zheng B, Szymanowski JES, Burns PC, Liu T. Standalone 2-D Nanosheets and the Consequent Hydrogel and Coacervate Phases Formed by 2.5 nm Spherical U 60 Molecular Clusters in Dilute Aqueous Solution. J Phys Chem B 2021; 125:12392-12397. [PMID: 34705443 DOI: 10.1021/acs.jpcb.1c08019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Unexpected hydrogel and coacervate are observed for dilute (1 mM) uranyl peroxide molecular cluster (Li68K12(OH)20[UO2(O2)(OH)]60, U60) solution in the presence of di- or trivalent salts. We report the mechanism as the formation of anisotropic two-dimensional (2-D) single-layer nanosheets, driven by counterion-mediated attraction due to the size disparity between U60 and small counterions. With weak monovalent cations, the nanosheets are bendable, resulting in hollow, spherical blackberry-type supramolecular assemblies in a homogeneous solution. With extra strong divalent or trivalent cations, the tough, free-standing sheets lead to gelation at ∼1 mM U60. These stiff nanosheets are difficult to bend into spherical blackberry-type structures; instead, they stay in solution and form hydrogel based on their significant excluded volumes. At higher ionic strength, the large, thin filmlike nanosheet structures stack together more compactly and consequently lead to the transition from gel phase to a coacervate phase, another surprise since it was formed without the presence of bulky polycations.
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Affiliation(s)
- Yuqing Yang
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Yifan Zhou
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Jiahui Chen
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Tsuyoshi Kohlgruber
- Department of Civil Engineering and Geological Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Travis Smith
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Bowen Zheng
- Copley High School, Akron, Ohio 44321, United States
| | - Jennifer E S Szymanowski
- Department of Civil Engineering and Geological Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Peter C Burns
- Department of Civil Engineering and Geological Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Tianbo Liu
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, Ohio 44325, United States
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5
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Chen J, Bera MK, Li H, Yang Y, Sun X, Luo J, Baughman J, Liu C, Yao X, Chuang SSC, Liu T. Accurate Determination of the Quantity and Spatial Distribution of Counterions around a Spherical Macroion. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202013806] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Jiahui Chen
- School of Polymer Science and Polymer Engineering The University of Akron Akron OH 44325-3909 USA
| | - Mrinal K. Bera
- NSF's ChemMatCARS Center for Advanced Radiation Sources The University of Chicago Chicago IL 60637 USA
| | - Hui Li
- School of Polymer Science and Polymer Engineering The University of Akron Akron OH 44325-3909 USA
| | - Yuqing Yang
- School of Polymer Science and Polymer Engineering The University of Akron Akron OH 44325-3909 USA
| | - Xinyu Sun
- School of Polymer Science and Polymer Engineering The University of Akron Akron OH 44325-3909 USA
| | - Jiancheng Luo
- School of Polymer Science and Polymer Engineering The University of Akron Akron OH 44325-3909 USA
| | - Jessi Baughman
- School of Polymer Science and Polymer Engineering The University of Akron Akron OH 44325-3909 USA
| | - Cheng Liu
- School of Polymer Science and Polymer Engineering The University of Akron Akron OH 44325-3909 USA
| | - Xuesi Yao
- School of Polymer Science and Polymer Engineering The University of Akron Akron OH 44325-3909 USA
| | - Steven S. C. Chuang
- School of Polymer Science and Polymer Engineering The University of Akron Akron OH 44325-3909 USA
| | - Tianbo Liu
- School of Polymer Science and Polymer Engineering The University of Akron Akron OH 44325-3909 USA
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6
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Chen J, Bera MK, Li H, Yang Y, Sun X, Luo J, Baughman J, Liu C, Yao X, Chuang SSC, Liu T. Accurate Determination of the Quantity and Spatial Distribution of Counterions around a Spherical Macroion. Angew Chem Int Ed Engl 2021; 60:5833-5837. [PMID: 33295092 DOI: 10.1002/anie.202013806] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 12/05/2020] [Indexed: 11/10/2022]
Abstract
The accurate distribution of countercations (Rb+ and Sr2+ ) around a rigid, spherical, 2.9-nm size polyoxometalate cluster, {Mo132 }42- , is determined by anomalous small-angle X-ray scattering. Both Rb+ and Sr2+ ions lead to shorter diffuse lengths for {Mo132 } than prediction. Most Rb+ ions are closely associated with {Mo132 } by staying near the skeleton of {Mo132 } or in the Stern layer, whereas more Sr2+ ions loosely associate with {Mo132 } in the diffuse layer. The stronger affinity of Rb+ ions towards {Mo132 } than that of Sr2+ ions explains the anomalous lower critical coagulation concentration of {Mo132 } with Rb+ compared to Sr2+ . The anomalous behavior of {Mo132 } can be attributed to majority of negative charges being located at the inner surface of its cavity. The longer anion-cation distance weakens the Coulomb interaction, making the enthalpy change owing to the breakage of hydration layers of cations more important in regulating the counterion-{Mo132 } interaction.
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Affiliation(s)
- Jiahui Chen
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44325-3909, USA
| | - Mrinal K Bera
- NSF's ChemMatCARS, Center for Advanced Radiation Sources, The University of Chicago, Chicago, IL, 60637, USA
| | - Hui Li
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44325-3909, USA
| | - Yuqing Yang
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44325-3909, USA
| | - Xinyu Sun
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44325-3909, USA
| | - Jiancheng Luo
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44325-3909, USA
| | - Jessi Baughman
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44325-3909, USA
| | - Cheng Liu
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44325-3909, USA
| | - Xuesi Yao
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44325-3909, USA
| | - Steven S C Chuang
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44325-3909, USA
| | - Tianbo Liu
- School of Polymer Science and Polymer Engineering, The University of Akron, Akron, OH, 44325-3909, USA
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7
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Traustason H, Bell NL, Caranto K, Auld DC, Lockey DT, Kokot A, Szymanowski JES, Cronin L, Burns PC. Reactivity, Formation, and Solubility of Polyoxometalates Probed by Calorimetry. J Am Chem Soc 2020; 142:20463-20469. [PMID: 33203207 DOI: 10.1021/jacs.0c10133] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Room temperature calorimetry methods were developed to describe the energy landscapes of six polyoxometalates (POMs), Li-U24, Li-U28, K-U28, Li/K-U60, Mo132, and Mo154, in terms of three components: enthalpy of dissolution (ΔHdiss), enthalpy of formation of aqueous POMs (ΔHf,(aq)), and enthalpy of formation of POM crystals (ΔHf,(c)). ΔHdiss is controlled by a combination of cation solvation enthalpy and the favorability of cation interactions with binding sites on the POM. In the case of the four uranyl peroxide POMs studied, clusters with hydroxide bridges have lower ΔHf,(aq) and are more stable than those containing only peroxide bridges. In general for POMs, the combination of calorimetric results and synthetic observations suggest that spherical topologies may be more stable than wheel-like clusters, and ΔHf,(aq) can be accurately estimated using only ΔHf,(c) values owing to the dominance of the clusters in determining the energetics of POM crystals.
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Affiliation(s)
- Hrafn Traustason
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Nicola L Bell
- School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, United Kingdom
| | - Kiana Caranto
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - David C Auld
- School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, United Kingdom
| | - David T Lockey
- School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, United Kingdom
| | - Alex Kokot
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Jennifer E S Szymanowski
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Leroy Cronin
- School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, United Kingdom
| | - Peter C Burns
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
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8
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Li H, Shen Y, Yang P, Szymanowski JES, Chen J, Gao Y, Burns PC, Kortz U, Liu T. Isotope and Hydrogen‐Bond Effects on the Self‐Assembly of Macroions in Dilute Solution. Chemistry 2019; 25:16288-16293. [DOI: 10.1002/chem.201902444] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 09/10/2019] [Indexed: 11/08/2022]
Affiliation(s)
- Hui Li
- Department of Polymer Science University of Akron Akron Ohio 44325-3909 USA
| | - Yidan Shen
- Department of Polymer Science University of Akron Akron Ohio 44325-3909 USA
| | - Peng Yang
- Department of Life Sciences and Chemistry Jacobs University Campus Ring 1 28759 Bremen Germany
| | - Jennifer E. S. Szymanowski
- Department of Civil and Environmental Engineering and Earth Sciences University of Notre Dame Notre Dame IN 46556 USA
| | - Jiahui Chen
- Department of Polymer Science University of Akron Akron Ohio 44325-3909 USA
| | - Yunyi Gao
- Department of Polymer Science University of Akron Akron Ohio 44325-3909 USA
| | - Peter C. Burns
- Department of Civil and Environmental Engineering and Earth Sciences University of Notre Dame Notre Dame IN 46556 USA
| | - Ulrich Kortz
- Department of Life Sciences and Chemistry Jacobs University Campus Ring 1 28759 Bremen Germany
| | - Tianbo Liu
- Department of Polymer Science University of Akron Akron Ohio 44325-3909 USA
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9
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Sadergaski LR, Said M, Hixon AE. Calcium-Facilitated Aggregation and Precipitation of the Uranyl Peroxide Nanocluster U 60 in the Presence of Na-Montmorillonite. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2019; 53:4922-4930. [PMID: 30920204 DOI: 10.1021/acs.est.8b06731] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The unique and diverse features of uranyl peroxide nanoclusters may contribute to the enhanced mobility of uranium in the environment. This study examines the sorption of the uranyl peroxide nanocluster [UO2(O2)(OH)]6060- (U60) to Na-montmorillonite (SWy-2), plagioclase (anorthite), and quartz (SiO2) as a function of time, U60 concentration, and mineral concentration. SWy-2 was studied in both its untreated form as well as after two different pretreatments, denoted as partially treated SWy-2 and fully treated SWy-2. U60 was removed (∼99%) from solution in the presence of untreated and partially treated SWy-2. However, U60 was not removed from suspensions containing anorthite, quartz, or fully treated SWy-2, even after several months. The removal of U60 from suspensions containing untreated SWy-2 is promoted in part by the exchange of Li+ counter-ions, normally weakly associated with U60 in solution, for Ca2+ ions naturally present in the clay. In solution, Ca2+ ions induce the aggregation of nanoclusters, which precipitate on the surface of SWy-2. Ca-rich U60 aggregates associated with SWy-2 were identified and characterized by scanning electron microscopy with energy dispersive spectroscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. This research enhances our understanding of the molecular-scale processes controlling U60 behavior at the mineral-water interface.
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Affiliation(s)
- Luke R Sadergaski
- Department of Civil and Environmental Engineering and Earth Sciences , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Meena Said
- Department of Civil and Environmental Engineering and Earth Sciences , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Amy E Hixon
- Department of Civil and Environmental Engineering and Earth Sciences , University of Notre Dame , Notre Dame , Indiana 46556 , United States
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10
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Li H, Wang R, Hong Y, Liang Z, Shen Y, Nishiyama Y, Miyoshi T, Liu T. Tuning the Intercage Distance in Charge‐Regulated Blackberry‐Type Assemblies through Host–Guest Chemistry. Chemistry 2019; 25:5803-5808. [DOI: 10.1002/chem.201900800] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Indexed: 01/26/2023]
Affiliation(s)
- Hui Li
- Department of Polymer Science The University of Akron Akron OH 44325-3909 USA
| | - Ruifu Wang
- Department of Polymer Science The University of Akron Akron OH 44325-3909 USA
| | - You‐lee Hong
- RIKEN CLST-JEOL Collaboration Center Yokohama Kanagawa 230-0045 Japan
| | - Zihao Liang
- Department of Polymer Science The University of Akron Akron OH 44325-3909 USA
| | - Yidan Shen
- Department of Polymer Science The University of Akron Akron OH 44325-3909 USA
| | - Yusuke Nishiyama
- RIKEN CLST-JEOL Collaboration Center Yokohama Kanagawa 230-0045 Japan
- JEOL RESONANCE Inc. Tokyo 196-8558 Japan
| | - Toshikazu Miyoshi
- Department of Polymer Science The University of Akron Akron OH 44325-3909 USA
| | - Tianbo Liu
- Department of Polymer Science The University of Akron Akron OH 44325-3909 USA
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11
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Lobeck HL, Traustason H, Julien PA, FitzPatrick JR, Mana S, Szymanowski JES, Burns PC. In situ Raman spectroscopy of uranyl peroxide nanoscale cage clusters under hydrothermal conditions. Dalton Trans 2019; 48:7755-7765. [DOI: 10.1039/c9dt01529a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The behaviours of two uranyl peroxide nanoclusters in water heated to 180 °C were examined by in situ Raman spectroscopy.
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Affiliation(s)
- Haylie L. Lobeck
- Department of Civil and Environmental Engineering and Earth Sciences
- University of Notre Dame
- Notre Dame
- USA
| | - Hrafn Traustason
- Department of Chemistry and Biochemistry
- University of Notre Dame
- Notre Dame
- USA
| | | | - John R. FitzPatrick
- Department of Civil and Environmental Engineering and Earth Sciences
- University of Notre Dame
- Notre Dame
- USA
| | - Sara Mana
- Department of Geological Sciences
- Salem State University
- Salem
- USA
| | - Jennifer E. S. Szymanowski
- Department of Civil and Environmental Engineering and Earth Sciences
- University of Notre Dame
- Notre Dame
- USA
| | - Peter C. Burns
- Department of Civil and Environmental Engineering and Earth Sciences
- University of Notre Dame
- Notre Dame
- USA
- Department of Chemistry and Biochemistry
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12
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Traustason H, Aksenov SM, Burns PC. The lithium–water configuration encapsulated by uranyl peroxide cage cluster U24. CrystEngComm 2019. [DOI: 10.1039/c8ce01774c] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Lithium cations encapsulated within the U24 nanocapsule are in square pyramidal and octahedral coordination environments imposed by the topology of the cluster, whereas lithium outside the cages are in a tetrahedral coordination environment.
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Affiliation(s)
- H. Traustason
- Department of Chemistry and Biochemistry
- University of Notre Dame
- Indiana
- USA
| | - S. M. Aksenov
- Department of Civil and Environmental Engineering & Earth Sciences
- University of Notre Dame
- Indiana
- USA
| | - P. C. Burns
- Department of Chemistry and Biochemistry
- University of Notre Dame
- Indiana
- USA
- Department of Civil and Environmental Engineering & Earth Sciences
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13
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Sadergaski LR, Hixon AE. Kinetics of Uranyl Peroxide Nanocluster (U 60) Sorption to Goethite. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:9818-9826. [PMID: 30062873 DOI: 10.1021/acs.est.8b02716] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The unique properties of uranium-based nanomaterials may significantly impact our current understanding of the fate and transport of U(VI) in environmental systems. Sorption of the uranyl peroxide nanocluster [(UO2)(O2)(OH)]6060- (U60) to goethite (α-FeOOH) was studied using batch sorption experiments as a function of U60 concentration (0.5-2 g·L-1), mineral concentration (100-500 m2·L-1), and pH (8-10). The resulting rate law describing U60 interactions with goethite at pH 9 was R = - krxn[U60]0.29±0.02[goethite]1.2±0.1 where krxn = (6.7 ± 2.0) × 10-4 (g·L-1)0.71±0.02(m2·L-1)-1.2±0.1(day-1). The largest fraction of U60 removed from solution was at pH 8, which is below the isoelectric point of the goethite used in this study. Site density calculations suggest that U60 may exist on the goethite surface at a center-to-center distance of 5.4-6.5 nm, depending upon pH, which mirrors the center-to-center distance observed in the aqueous phase near the U60 solubility limit. At pH 10, approximately 20% uranium was desorbed within 3 days. Analysis of the reacted mineral surface using X-ray photoelectron spectroscopy confirmed the presence of a single U(VI) species on the mineral surface, and electrospray ionization mass spectrometry revealed that U60 remains intact during the sorption and desorption processes. These results demonstrate that the behavior of U60 at the goethite-water interface is similar to that of discrete U(VI) but is governed by different sorption mechanisms and reaction kinetics, which has the potential to alter our current understanding of the fate and transport of uranium species in the environment.
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Affiliation(s)
- Luke R Sadergaski
- Department of Civil and Environmental Engineering and Earth Sciences , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Amy E Hixon
- Department of Civil and Environmental Engineering and Earth Sciences , University of Notre Dame , Notre Dame , Indiana 46556 , United States
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14
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Chu Y, Chen J, Haso F, Gao Y, Szymanowski JES, Burns PC, Liu T. Expanding the Schulze–Hardy Rule and the Hofmeister Series to Nanometer‐Scaled Hydrophilic Macroions. Chemistry 2018; 24:5479-5483. [DOI: 10.1002/chem.201706101] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Yang Chu
- Department of Polymer Science The University of Akron Akron OH 44325 USA
| | - Jiahui Chen
- Department of Polymer Science The University of Akron Akron OH 44325 USA
| | - Fadi Haso
- Department of Polymer Science The University of Akron Akron OH 44325 USA
| | - Yunyi Gao
- Department of Polymer Science The University of Akron Akron OH 44325 USA
| | - Jennifer E. S. Szymanowski
- Department of Civil and Environmental Engineering and Earth Science University of Notre Dame Notre Dame IN 46556 USA
| | - Peter C. Burns
- Department of Civil and Environmental Engineering and Earth Science University of Notre Dame Notre Dame IN 46556 USA
| | - Tianbo Liu
- Department of Polymer Science The University of Akron Akron OH 44325 USA
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15
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Sadergaski LR, Stoxen W, Hixon AE. Uranyl Peroxide Nanocluster (U 60) Persistence and Sorption in the Presence of Hematite. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:3304-3311. [PMID: 29436227 DOI: 10.1021/acs.est.7b06510] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The presence of uranium-based nanomaterials in environmental systems may significantly impact our current understanding of the fate and transport of U(VI). Sorption of the uranyl peroxide nanocluster [(UO2)(O2)(OH)]6060- (U60) to hematite (α-Fe2O3) was studied using batch sorption experiments with varying U60, hematite, and alkali electrolyte (i.e., NaCl, KCl, and CsCl) concentrations. Data from electrospray ionization mass spectrometry and centrifugal microfiltration revealed that U60 persisted in the presence of hematite and the background electrolyte for at least 120 days. K+ ions were removed from solution with uranium whereas Li+ ions remained in solution, indicating that the U60 cluster behaved like an anion and that the Li+ ions did not play a significant role in the sorption mechanism. Analysis of the reacted mineral surface using X-ray photoelectron and Raman spectroscopies confirmed the presence of U(VI) and uranyl species with bridged peroxo groups associated with the mineral surface. These results indicate that uranyl peroxide nanoclusters may persist in the aqueous phase under environmentally relevant conditions for reasonably long periods of time, as compared to that of the uranyl cation.
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Affiliation(s)
- Luke R Sadergaski
- Department of Civil and Environmental Engineering and Earth Sciences , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Wynn Stoxen
- Department of Civil and Environmental Engineering and Earth Sciences , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Amy E Hixon
- Department of Civil and Environmental Engineering and Earth Sciences , University of Notre Dame , Notre Dame , Indiana 46556 , United States
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16
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Burns PC, Nyman M. Captivation with encapsulation: a dozen years of exploring uranyl peroxide capsules. Dalton Trans 2018; 47:5916-5927. [DOI: 10.1039/c7dt04245k] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Uranyl peroxide cages are an extensive family of topologically varied self-assembling nanoscale clusters with fascinating properties and applications.
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Affiliation(s)
- Peter C. Burns
- Department of Civil and Environmental Engineering and Earth Sciences
- University of Notre Dame
- Notre Dame
- USA
- Department of Chemistry and Biochemistry
| | - May Nyman
- Department of Chemistry
- Oregon State University
- Corvallis
- USA
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17
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Measurement of the effective capacitance of solutions containing nanoscale uranyl peroxide cage clusters (U60) reveals cluster effects. J Radioanal Nucl Chem 2017. [DOI: 10.1007/s10967-017-5659-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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18
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Olds TA, Dembowski M, Wang X, Hoffman C, Alam TM, Hickam S, Pellegrini KL, He J, Burns PC. Single-Crystal Time-of-Flight Neutron Diffraction and Magic-Angle-Spinning NMR Spectroscopy Resolve the Structure and 1H and 7Li Dynamics of the Uranyl Peroxide Nanocluster U 60. Inorg Chem 2017; 56:9676-9683. [PMID: 28783328 DOI: 10.1021/acs.inorgchem.7b01174] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Single-crystal time-of-flight neutron diffraction has provided atomic resolution of H atoms of H2O molecules and hydroxyl groups, as well as Li cations in the uranyl peroxide nanocluster U60. Solid-state magic-angle-spinning nuclear magnetic resonance (MAS NMR) spectroscopy was used to confirm the dynamics of these constituents, revealing the transportation of Li atoms and H2O through cluster walls. H atoms of hydroxyl units that are located on the cluster surface are involved in the transfer of H2O and Li cations from inside to outside and vice versa. This exchange occurs as a concerted motion and happens rapidly even in the solid state. As a consequence of its large size and open hexagonal pores, U60 exchanges Li cations more rapidly compared to other uranyl nanoclusters.
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Affiliation(s)
| | | | | | | | - Todd M Alam
- Department of Organic Material Science, Sandia National Laboratories , Albuquerque, New Mexico 87185, United States
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19
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Gao Y, Dembowski M, Szymanowski JES, Yin W, Chuang SSC, Burns PC, Liu T. A Spontaneous Structural Transition of {U
24
Pp
12
} Clusters Triggered by Alkali Counterion Replacement in Dilute Solution. Chemistry 2017; 23:7915-7919. [DOI: 10.1002/chem.201701972] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Yunyi Gao
- Department of Polymer Science University of Akron Akron OH 44325 USA
| | - Mateusz Dembowski
- Department of Chemistry and Biochemistry University of Notre Dame Notre Dame IN 46556 USA
| | - Jennifer E. S. Szymanowski
- Department of Civil and Environmental Engineering and Earth Science University of Notre Dame Notre Dame IN 46556 USA
| | - Wenbin Yin
- Department of Polymer Science University of Akron Akron OH 44325 USA
| | | | - Peter C. Burns
- Department of Chemistry and Biochemistry University of Notre Dame Notre Dame IN 46556 USA
- Department of Civil and Environmental Engineering and Earth Science University of Notre Dame Notre Dame IN 46556 USA
| | - Tianbo Liu
- Department of Polymer Science University of Akron Akron OH 44325 USA
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20
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Peruski KM, Bernales V, Dembowski M, Lobeck HL, Pellegrini KL, Sigmon GE, Hickam S, Wallace CM, Szymanowski JES, Balboni E, Gagliardi L, Burns PC. Uranyl Peroxide Cage Cluster Solubility in Water and the Role of the Electrical Double Layer. Inorg Chem 2017; 56:1333-1339. [PMID: 28075118 DOI: 10.1021/acs.inorgchem.6b02435] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kathryn M. Peruski
- Department of Civil
and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Varinia Bernales
- Department of Chemistry, Minnesota Supercomputing
Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Mateusz Dembowski
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Haylie L. Lobeck
- Department of Civil
and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Kristi L. Pellegrini
- Department of Civil
and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Ginger E. Sigmon
- Department of Civil
and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Sarah Hickam
- Department of Civil
and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Christine M. Wallace
- Department of Civil
and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Jennifer E. S. Szymanowski
- Department of Civil
and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Enrica Balboni
- Department of Civil
and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre
Dame, Indiana 46556, United States
| | - Laura Gagliardi
- Department of Chemistry, Minnesota Supercomputing
Institute, University of Minnesota, Minneapolis, Minnesota 55455, United States
| | - Peter C. Burns
- Department of Civil
and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre
Dame, Indiana 46556, United States
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre
Dame, Indiana 46556, United States
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21
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Gao Y, Eghtesadi S, Liu T. Supramolecular Structures Formation of Polyoxometalates in Solution Driven by Counterion–Macroion Interaction. ADVANCES IN INORGANIC CHEMISTRY 2017. [DOI: 10.1016/bs.adioch.2016.12.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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22
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Gao Y, Szymanowski JES, Sun X, Burns PC, Liu T. Thermal Responsive Ion Selectivity of Uranyl Peroxide Nanocages: An Inorganic Mimic of K
+
Ion Channels. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601852] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Yunyi Gao
- Department of Polymer Science University of Akron Akron OH 44325 USA
| | - Jennifer E. S. Szymanowski
- Department of Civil Engineering and Geological Sciences University of Notre Dame Notre Dame IN 46556 USA
| | - Xinyu Sun
- Department of Polymer Science University of Akron Akron OH 44325 USA
| | - Peter C. Burns
- Department of Civil Engineering and Geological Sciences University of Notre Dame Notre Dame IN 46556 USA
| | - Tianbo Liu
- Department of Polymer Science University of Akron Akron OH 44325 USA
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23
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Gao Y, Szymanowski JES, Sun X, Burns PC, Liu T. Thermal Responsive Ion Selectivity of Uranyl Peroxide Nanocages: An Inorganic Mimic of K(+) Ion Channels. Angew Chem Int Ed Engl 2016; 55:6887-91. [PMID: 27105921 DOI: 10.1002/anie.201601852] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 03/26/2016] [Indexed: 11/08/2022]
Abstract
An actinyl peroxide cage cluster, Li48+m K12 (OH)m [UO2 (O2 )(OH)]60 (H2 O)n (m≈20 and n≈310; U60 ), discriminates precisely between Na(+) and K(+) ions when heated to certain temperatures, a most essential feature for K(+) selective filters. The U60 clusters demonstrate several other features in common with K(+) ion channels, including passive transport of K(+) ions, a high flux rate, and the dehydration of U60 and K(+) ions. These qualities make U60 (a pure inorganic cluster) a promising ion channel mimic in an aqueous environment. Laser light scattering (LLS) and isothermal titration calorimetry (ITC) studies revealed that the tailorable ion selectivity of U60 clusters is a result of the thermal responsiveness of the U60 hydration shells.
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Affiliation(s)
- Yunyi Gao
- Department of Polymer Science, University of Akron, Akron, OH, 44325, USA
| | - Jennifer E S Szymanowski
- Department of Civil Engineering and Geological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA
| | - Xinyu Sun
- Department of Polymer Science, University of Akron, Akron, OH, 44325, USA
| | - Peter C Burns
- Department of Civil Engineering and Geological Sciences, University of Notre Dame, Notre Dame, IN, 46556, USA.
| | - Tianbo Liu
- Department of Polymer Science, University of Akron, Akron, OH, 44325, USA.
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24
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Soltis JA, Wallace CM, Penn RL, Burns PC. Cation-Dependent Hierarchical Assembly of U60 Nanoclusters into Macro-Ion Assemblies Imaged via Cryogenic Transmission Electron Microscopy. J Am Chem Soc 2015; 138:191-8. [PMID: 26710311 DOI: 10.1021/jacs.5b09802] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Self-assembly of ([UO2(O2)OH]60)(60-) (U60), an actinide polyoxometalate with fullerene topology, can be induced by the addition of mono- and divalent cations to aqueous U60 solutions. Dynamic light scattering and small-angle X-ray scattering lend important insights into assembly in this system, but direct imaging of U60 and its assemblies via transmission electron microscopy (TEM) has remained an elusive goal. In this work, we used cryogenic TEM to image U60 and secondary and tertiary assemblies of U60 to characterize the size, morphology, and rate of formation of the secondary and tertiary structures. The kinetics and final morphologies of the secondary and tertiary structures strongly depend on the cation employed, with monovalent cations (Na(+) and K(+)) leading to the highest rates and largest secondary and tertiary structures.
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Affiliation(s)
- Jennifer A Soltis
- Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Christine M Wallace
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame , Notre Dame, Indiana 46556, United States
| | - R Lee Penn
- Department of Chemistry, University of Minnesota , Minneapolis, Minnesota 55455, United States
| | - Peter C Burns
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame , Notre Dame, Indiana 46556, United States.,Department of Chemistry and Biochemistry, University of Notre Dame , Notre Dame, Indiana 46556, United States
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