1
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Dembowski M, Rasmussen HE, Rowley JE, Droessler JE, Goff GS, May I. Separation of rare earth element radioisotopes by reverse-phase high-speed counter-current chromatography. J Chromatogr A 2023; 1712:464478. [PMID: 37926007 DOI: 10.1016/j.chroma.2023.464478] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 10/26/2023] [Accepted: 10/27/2023] [Indexed: 11/07/2023]
Abstract
Analytical scale purification of rare earth element (REE) radioisotopes is typically accomplished using cation-exchange resins (e.g. AG 50W-X8) and high-performance liquid chromatography (HPLC). Despite the variety of improvements made since the development of this separation process in the 1950s, nearest neighbor separations remain a challenge, as does the issue of irreversible sample adsorption. Herein, we report a study that evaluates the potential of high-speed counter-current chromatography (HSCCC) as an alternative method for purifying REE elements, with specific reference to separations of fission product REE of interest to nuclear forensics. Complementary HSCCC REE separation experiments, one spiked with radiotracer and REE fission product activity, allowed for in depth analysis of resulting fractions from both an elemental (inductively coupled plasma atomic emission spectroscopy, ICP-AES) and radiological (gamma-ray spectrometry, beta counting) purity perspective. The highly reproducible nature of separation profiles generated from HSCCC instruments was leveraged to simplify work-up of samples containing radioisotopes. Subsequent radioanalytical evaluation revealed minimal carryover of Eu into neighboring Sm and Tb fractions (as indicated by presence of 150Eu), and trace contamination of the Tb fraction with Y (as indicated by presence of 91Y). Subtle differences in stationary phase retention across the two columns were reflected in significant variations in decontamination factors of duplicate parallel separations. These differences paired with obtained distribution of radioisotopes provided valuable insights into future improvements. Collectively, this study represents a significant step forward in development of HSCCC technology for task specific REE radioisotope purification.
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Affiliation(s)
- Mateusz Dembowski
- Los Alamos National Laboratory, Los Alamos, NM 87545, United States.
| | - Hope E Rasmussen
- Los Alamos National Laboratory, Los Alamos, NM 87545, United States
| | - John E Rowley
- Los Alamos National Laboratory, Los Alamos, NM 87545, United States
| | | | - George S Goff
- Los Alamos National Laboratory, Los Alamos, NM 87545, United States
| | - Iain May
- Los Alamos National Laboratory, Los Alamos, NM 87545, United States
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2
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Dembowski M, Rowley JE, Boland K, Droessler J, Hathcoat DA, Marchi A, Goff GS, May I. Rare earth element separations by high-speed counter-current chromatography. J Chromatogr A 2022; 1682:463528. [PMID: 36179601 DOI: 10.1016/j.chroma.2022.463528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2022] [Revised: 09/19/2022] [Accepted: 09/20/2022] [Indexed: 11/17/2022]
Abstract
Following the initial development of High-Speed Counter-Current Chromatography (HSCCC) in the 1960s, several studies have explored its applicability in the separation of rare earth elements (REEs). More recently, however, HSCCC publications have transitioned towards the separation of natural products or pharmaceuticals, leaving the application for REEs largely unexplored from a practical standpoint. Herein, we expand upon prior work in this field by evaluating the suitability of HSCCC to separation of a subset of non-radioactive REEs (Nd, Sm, Eu, Tb, and Y) at 10-4 mol levels using di-(2-ethylhexyl)phosphoric acid (HDEHP) in n-heptane as the stationary phase and hydrochloric acid as the mobile phase. First, the effect of flow rate on the stationary phase volume retention ratio and resolution of Nd/Sm/Eu subgroup was evaluated followed by optimization of step-gradient elution profiles resulting in additional recovery of Tb and Y within a seven-hour window. The five REEs were separated at the baseline resolution level or above. Elution profiles obtained from multiple runs across two independently operated columns and across independent runs were cross analyzed. Reproducibility in elution profiles point to future applications in radioelement separation chemistry, where both chemical and radiochemical purity are of importance.
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Affiliation(s)
| | - John E Rowley
- Los Alamos National Laboratory, Los Alamos, NM 87545, Mexico
| | - Kevin Boland
- Los Alamos National Laboratory, Los Alamos, NM 87545, Mexico
| | | | | | | | - George S Goff
- Los Alamos National Laboratory, Los Alamos, NM 87545, Mexico
| | - Iain May
- Los Alamos National Laboratory, Los Alamos, NM 87545, Mexico
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3
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Dembowski M, Margiotta C, Smythe NC, Flanagan DC, Meininger D, James MR, Hudston LA, Boswell M, Lance CA, Rendon RJ, Goff GS, May I. Column separation of tetravalent cerium fission products from trivalent rare earth radio-isotopes. J Radioanal Nucl Chem 2022. [DOI: 10.1007/s10967-022-08277-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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4
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Prange MP, Graham TR, Gorniak R, Pouvreau M, Dembowski M, Wang HW, Daemen LL, Schenter GK, Bowden ME, Nienhuis ET, Rosso KM, Clark AE, Pearce CI. Theory-Guided Inelastic Neutron Scattering of Crystalline Alkaline Aluminate Salts Bearing Principal Motifs of Solution-State Species. Inorg Chem 2021; 60:16223-16232. [PMID: 34644061 DOI: 10.1021/acs.inorgchem.1c02006] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Aluminate salts precipitated from caustic alkaline solutions exhibit a correlation between the anionic speciation and the identity of the alkali cation in the precipitate, with the aluminate ions occurring either in monomeric (Al(OH)4-) or dimeric (Al2O(OH)62-) forms. The origin of this correlation is poorly understood as are the roles that oligomeric aluminate species play in determining the solution structure, prenucleation clusters, and precipitation pathways. Characterization of aluminate solution speciation with vibrational spectroscopy results in spectra that are difficult to interpret because the ions access a diverse and dynamic configurational space. To investigate the Al(OH)4- and Al2O(OH)62- anions within a well-defined crystal lattice, inelastic neutron scattering (INS) and Raman spectroscopic data were collected and simulated by density functional theory for K2[Al2O(OH)6], Rb2[Al2O(OH)6], and Cs[Al(OH) 4]·2H2O. These structures capture archetypal solution aluminate species: the first two salts contain dimeric Al2O(OH)62- anions, while the third contains the monomeric Al(OH)4- anion. Comparisons were made to the INS and Raman spectra of sodium aluminate solutions frozen in a glassy state. In contrast to solution systems, the crystal lattice of the salts results in well-defined vibrations and associated resolved bands in the INS spectra. The use of a theory-guided analysis of the INS of this solid alkaline aluminate series revealed that differences were related to the nature of the hydrogen-bonding network and showed that INS is a sensitive probe of the degree of completeness and strength of the bond network in hydrogen-bonded materials. Results suggest that the ionic size may explain cation-specific differences in crystallization pathways in alkaline aluminate salts.
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Affiliation(s)
- Micah P Prange
- Physical Sciences Division, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Trent R Graham
- Physical Sciences Division, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Rafal Gorniak
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Maxime Pouvreau
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Mateusz Dembowski
- Physical Sciences Division, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Hsiu-Wen Wang
- Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Luke L Daemen
- Neutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Gregory K Schenter
- Physical Sciences Division, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States.,Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Mark E Bowden
- Physical Sciences Division, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Emily T Nienhuis
- Physical Sciences Division, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Kevin M Rosso
- Physical Sciences Division, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Aurora E Clark
- Physical Sciences Division, Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States.,Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Carolyn I Pearce
- Environmental Subsystem Science Division, Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99352, United States.,Department of Crop and Soil Sciences, Washington State University, Pullman, Washington 99164, United States
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5
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Mergelsberg ST, Dembowski M, Bowden ME, Graham TR, Prange M, Wang HW, Zhang X, Qafoku O, Rosso KM, Pearce CI. Cluster defects in gibbsite nanoplates grown at acidic to neutral pH. Nanoscale 2021; 13:17373-17385. [PMID: 34713874 DOI: 10.1039/d1nr01615f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Gibbsite [α-Al(OH)3] is the solubility limiting phase for aluminum across a wide pH range, and it is a common mineral phase with many industrial applications. The growth mechanism of this layered-structure material, however, remains incompletely understood. Synthesis of gibbsite at low to circumneutral pH yields nanoplates with substantial interlayer disorder. Here we examine defects in this material in detail, and the effects of recrystallization in highly alkaline sodium hydroxide solution at 80 °C. We employed a multimodal approach, including scanning electron microscopy, magic-angle spinning nuclear magnetic resonance (MAS-NMR), Raman and infrared spectroscopies, X-ray diffraction (XRD), and X-ray total scattering pair distribution function (XPDF) analysis to characterize the ageing of the nanoplates over several days. XRD and XPDF indicate that gibbsite nanoplates precipitated at circumneutral pH contain dense, truncated sheets imparting a local difference in interlayer distance. These interlayer defects appear well described by flat Al13 aluminum hydroxide nanoclusters nearly isostructural with gibbsite sheets present under synthesis conditions and trapped as interlayer inclusions during growth. Ageing at elevated temperature in alkaline solutions gradually improves crystallinity, showing a gradual increase in H-bonding between interlayer OH groups. Between 7 to 8 vol% of the initial gibbsite nanoparticles exhibit this defect, with the majority of differences disappearing after 2-4 hours of recrystallization in alkaline solution. The results not only identify the source of disorder in gibbsite formed under acidic/neutral conditions but also point to a possible cluster-mediated growth mechanism evident through inclusion of relict oligomers with gibbsite-like topology trapped in the interlayer spaces.
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Affiliation(s)
| | - Mateusz Dembowski
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Mark E Bowden
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Trent R Graham
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Micah Prange
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Hsiu-Wen Wang
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Xin Zhang
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Odeta Qafoku
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Kevin M Rosso
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
| | - Carolyn I Pearce
- Pacific Northwest national Laboratory, Richland, Washington 99352, USA.
- Washington State University, Pullman, Washington 99164, USA
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6
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Dembowski M, Loring JS, Bowden ME, Reynolds JG, Graham TR, Rosso KM, Pearce CI. The controlling role of atmosphere in dawsonite versus gibbsite precipitation from tetrahedral aluminate species. Dalton Trans 2021; 50:13438-13446. [PMID: 34477710 DOI: 10.1039/d1dt02081a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In highly alkaline solution, aluminum speciates as the tetrahedrally coordinated aluminate monomer, Al(OH)4- and/or dimer Al2O(OH)62-, yet precipitates as octahedrally coordinated gibbsite (Al(OH)3). This tetrahedral to octahedral transformation governs Al precipitation, which is crucial to worldwide aluminum (Al) production, and to the retrieval and processing of Al-containing caustic high-level radioactive wastes. Despite its significance, the transformation pathway remains unknown. Here we explore the roles of atmospheric water and carbon dioxide in mediating the transformation of the tetrahedrally coordinated potassium aluminate dimer salt (K2Al2O(OH)6) to gibbsite versus potassium dawsonite (KAl(CO3)(OH)2). A combination of in situ attenuated total reflection infrared spectroscopy, ex situ micro X-ray diffraction, and multivariate curve resolution-alternating least squares chemometrics analysis reveals that humidity plays a key role in the transformation by limiting the amount of alkalinity neutralization by dissolved CO2. Lower humidity favors higher alkalinity and incorporation of carbonate species in the final Al product to form KAl(CO3)(OH)2. Higher humidity enables more acid generation that destabilizes dawsonite and favors gibbsite as the solubility limiting phase. This indicates that the transition from tetra- to octahedrally coordinated Al does not have to occur in bulk solution, as has often been hypothesized, but may instead occur in thin water films present on mineral surfaces in humid environments. Our findings suggest that phase selection can be controlled by humidity, which could enable new pathways to Al transformations useful to the Al processing industry, as well as improved understanding of phases that appear in caustic Al-bearing solutions exposed to atmospheric conditions.
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Affiliation(s)
- Mateusz Dembowski
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA.
| | - John S Loring
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA.
| | - Mark E Bowden
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA.
| | - Jacob G Reynolds
- Washington River Protection Solutions, LLC, Richland, Washington 93352, USA
| | - Trent R Graham
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA.
| | - Kevin M Rosso
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA.
| | - Carolyn I Pearce
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA. .,Washington State University, Pullman, WA, 99164, USA
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7
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Traustason H, Lobeck HL, Julien PA, Xu M, Dembowski M, Burns PC. Prediction of Solution Behavior via Calorimetric Measurements Allows for Detailed Elucidation of Polyoxometalate Transformation. Inorg Chem 2021; 60:6753-6763. [PMID: 33856789 DOI: 10.1021/acs.inorgchem.1c00587] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The solution behavior of a polyoxometalate cluster, LiNa-U24Pp12 (Li24Na24[(UO2O2)24(P2O7)12]) that consists of 24 uranyl ions, peroxide groups, and 12 pyrophosphate linkers, was successfully predicted based on new thermodynamic results using a calorimetric method recently described for uranyl peroxide nanoclusters (UPCs), molybdenum blues, and molybdenum browns. The breakdown of LiNa-U24Pp12 and formation of U24 (Li24[UO2O2OH]24) was monitored in situ via Raman spectroscopy using a custom heating apparatus. A combination of analytical techniques confirmed the simultaneous existence of U24Pp12 and U24 midway through the conversion process and U24 as the single end product. The application of a molecular weight filter resulted in a complete and successful separation of UPCs from solution and, in conjunction with DOSY results, confirmed the presence of large intermediate cluster building blocks.
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Affiliation(s)
- Hrafn Traustason
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Haylie L Lobeck
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Patrick A Julien
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Mengyu Xu
- Department of Civil & Environmental Engineering & Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Mateusz Dembowski
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - 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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Graham TR, Dembowski M, Wang HW, Mergelsberg ST, Nienhuis ET, Reynolds JG, Delegard CH, Wei Y, Snyder M, Leavy II, Baum SR, Fountain MS, Clark SB, Rosso KM, Pearce CI. Hydroxide promotes ion pairing in the NaNO 2-NaOH-H 2O system. Phys Chem Chem Phys 2021; 23:112-122. [PMID: 33305779 DOI: 10.1039/d0cp04799f] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Nitrite (NO2-) is a prevalent nitrogen oxyanion in environmental and industrial processes, but its behavior in solution, including ion pair formation, is complex. This solution phase complexity impacts industries such as nuclear waste treatment, where NO2- significantly affects the solubility of other constituents present in sodium hydroxide (NaOH)-rich nuclear waste. This work provides molecular scale information into sodium nitrite (NaNO2) and NaOH ion-pairing processes to provide a physical basis for later development of thermodynamic models. Solubility isotherms of NaNO2 in aqueous mixtures with NaOH and total alkalinity were also measured. Spectroscopic characterization of these solutions utilized high-field nuclear magnetic resonance spectroscopy (NMR) and Raman spectroscopy, with additional solution structure detailed by X-ray total scattering pairwise distribution function analysis (X-ray PDF). Despite the NO2- deformation Raman band's insensitivity to added NaOH in saturated NaNO2 solutions, 23Na and 15N NMR studies indicated the Na+ and NO2- chemical environments change likely due to ion pairing. The ion pairing correlates with a decrease in diffusion coefficient of solution species as measured by pulsed field gradient 23Na and 1H NMR. Two-dimensional correlation analyses of the 2800-4000 cm-1 Raman region and X-ray PDF indicated that saturated NaNO2 and NaOH mixtures disrupt the hydrogen network of water into a new structure where the length of the OO correlations is contracted relative to the typical H2O structure. Beyond describing the solubility of NaNO2 in a multicomponent electrolyte mixture, these results also indicate that nitrite exhibits greater ion pairing in mixtures of concentrated NaNO2 and NaOH than in comparable solutions with only NaNO2.
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Affiliation(s)
- Trent R Graham
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA.
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9
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Pouvreau M, Martinez-Baez E, Dembowski M, Pearce CI, Schenter GK, Rosso KM, Clark AE. Mechanisms of Al 3+ Dimerization in Alkaline Solutions. Inorg Chem 2020; 59:18181-18189. [PMID: 33252218 DOI: 10.1021/acs.inorgchem.0c02660] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The molecular speciation of aluminum (Al3+) in alkaline solutions is fundamental to its precipitation chemistry within a number of industrial applications that include ore refinement and industrial processing of Al wastes. Under these conditions, Al3+ is predominantly Al(OH)4-, while at high [Al3+] dimeric species are also known to form. To date, the mechanism of dimer formation remains unclear and is likely influenced by complex ion···ion interactions. In the present work, we investigate a suite of potential dimerization pathways and the role of ion pairing on energetics using static DFT calculations and DFT and density functional tight binding molecular dynamics. Specific cation effects imparted by the background electrolyte cations Na+, Li+, and K+ have been examined. Our simulations predict that, when the Al species are ion-paired with either cation, the formation of the oxo-bridged Al2O(OH)62- is favored with respect to the dihydroxo-bridged Al2(OH)82-, in agreement with previous spectroscopic work. The formation of both dimers first proceeds by bridging of two monomeric units via one hydroxo ligand, leading to a labile Al2(OH)82- isomer. The effect of contact ion pairing of Li+ and K+ on the dimerization energetics is distinctly more favorable than that of Na+, which may have an effect on further oligomerization.
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Affiliation(s)
- Maxime Pouvreau
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Ernesto Martinez-Baez
- Department of Chemistry, University of Washington, Seattle, Washington 98195, United States
| | - Mateusz Dembowski
- Los Alamos National Laboratory, Los Alamos, New Mexico 87545, United States
| | - Carolyn I Pearce
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Gregory K Schenter
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Kevin M Rosso
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Aurora E Clark
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
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10
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Dembowski M, Graham TR, Reynolds JG, Clark SB, Rosso KM, Pearce CI. Influence of soluble oligomeric aluminum on precipitation in the Al-KOH-H 2O system. Phys Chem Chem Phys 2020; 22:24677-24685. [PMID: 33103701 DOI: 10.1039/d0cp04820h] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The role of oligomeric aluminate species in the precipitation of aluminum (Al) phases such as gibbsite (α-Al(OH)3) from aqueous hydroxide solutions remains unclear and difficult to probe directly, despite its importance for developing accurate predictions of Al solubility in highly alkaline systems. Precipitation in this system entails a transition from predominantly tetrahedrally coordinated aluminate (Al(OH)4-) species in solution to octahedrally coordinated Al in gibbsite. Here we report a quantitative study of dissolved Al in the Al-KOH-H2O system using a combination of molecular spectroscopies. We establish a relationship between changes in 27Al NMR chemical shifts and the relative intensity of Raman vibrational bands, indicative of variations in the ensemble speciation of Al in solution, and the formation of unique contact ion pair interactions with the aluminate dimer, Al2O(OH)62-. A strong correlation between the extent of Al oligomerization and the amount of solvated Al was demonstrated by systematically varying the KOH : Al molar ratio. The concentration of dissolved oligomeric Al in solution also directly impacted the particle size and morphology of the precipitated gibbsite. High concentrations of dimeric Al2O(OH)62- yielded smaller and more numerous anhedral to subhedral gibbsite particles, while low concentrations yielded fewer and larger euhedral gibbsite platelets. The collective observations suggest a key role for the Al2O(OH)62- dimer in promoting gibbsite precipitation from solution, with the potassium ion-paired dimer catalyzing a more rapid transformation of Al from tetrahedral coordination in solution to octahedral coordination in gibbsite.
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Affiliation(s)
- Mateusz Dembowski
- Pacific Northwest National Laboratory, Richland, Washington, 99352, USA.
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11
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Graham TR, Gorniak R, Dembowski M, Zhang X, Clark SB, Pearce CI, Clark AE, Rosso KM. Solid-State Recrystallization Pathways of Sodium Aluminate Hydroxy Hydrates. Inorg Chem 2020; 59:6857-6865. [PMID: 32253907 DOI: 10.1021/acs.inorgchem.0c00258] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Crystallization of Al3+-bearing solid phases from highly alkaline Na2O:Al2O3:H2O solutions commonly necessitates an Al3+ coordination change from tetrahedral to octahedral, but intermediate coordination states are often difficult to isolate. Here, a similar Al3+ coordination change process is examined during the solid-state recrystallization of monosodium aluminate hydrate (MSA) to nonasodium bis(hexahydroxyaluminate) trihydroxide hexahydrate (NSA) at ambient temperature. While the MSA structure contains solely oxolated tetrahedral Al3+, the NSA structure is a molecular aluminate salt solely based upon monomeric octahedral Al3+. Spontaneous recrystallization of MSA and excess sodium hydroxide hydrate into NSA over 3 days of reaction time was clearly evident in X-ray diffractograms and in Raman spectra. In situ single-pulse 27Al magic angle spinning (MAS) nuclear magnetic resonance (NMR) spectroscopy and 27Al multiple quantum (MQ) MAS NMR spectroscopy showed no evidence of intermediate aluminates, suggesting that transitional states, such as pentacoordinate Al3+, are short-lived and require spectroscopy with greater time resolution to detect. Such research is advancing upon a detailed mechanistic understanding of Al3+ coordination change mechanisms in these highly alkaline systems, with relevance to aluminum refining, corrosion sciences, and nuclear waste processing.
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Affiliation(s)
- Trent R Graham
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Rafal Gorniak
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Mateusz Dembowski
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Xin Zhang
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Sue B Clark
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States.,Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States.,Materials Science and Engineering Program, Washington State University, Pullman, Washington 99164, United States
| | - Carolyn I Pearce
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Aurora E Clark
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Kevin M Rosso
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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12
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Dembowski M, Prange MP, Pouvreau M, Graham TR, Bowden ME, N'Diaye A, Schenter GK, Clark SB, Clark AE, Rosso KM, Pearce CI. Inference of principal species in caustic aluminate solutions through solid-state spectroscopic characterization. Dalton Trans 2020; 49:5869-5880. [PMID: 32307503 DOI: 10.1039/d0dt00229a] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Tetrahedrally coordinated aluminate Al(OH)4- and dialuminate Al2O(OH)62- anions are considered to be major species in aluminum-rich alkaline solutions. However, their relative abundance remains difficult to spectroscopically quantify due to local structure similarities and poorly understood effects arising from extent of polymerization and counter-cations. To help unravel these relationships here we report detailed characterization of three solid-phase analogues as structurally and compositionally well-defined reference materials. We successfully synthesized a cesium salt of the aluminate monomer, CsAl(OH)4·2H2O, for comparison to potassium and rubidium salts of the aluminate dimer, K2Al2O(OH)6, and Rb2Al2O(OH)6, respectively. Single crystal and powder X-ray diffraction methods clearly reveal the structure and purity of these materials for which a combination of 27Al MAS-NMR, Al K-edge X-ray absorption and Raman/IR spectroscopies was then used to fingerprint the two major tetrahedrally coordinated Al species. The resulting insights into the effect of Al-O-Al bridge formation between aluminate tetrahedra on spectroscopic features may also be generalized to the many materials that are based on this motif.
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Affiliation(s)
- Mateusz Dembowski
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA.
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13
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Dembowski M, Snyder MM, Delegard CH, Reynolds JG, Graham TR, Wang HW, Leavy II, Baum SR, Qafoku O, Fountain MS, Rosso KM, Clark SB, Pearce CI. Ion-ion interactions enhance aluminum solubility in alkaline suspensions of nano-gibbsite (α-Al(OH) 3) with sodium nitrite/nitrate. Phys Chem Chem Phys 2020; 22:4368-4378. [PMID: 31850442 DOI: 10.1039/c9cp05856g] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Despite widespread industrial importance, predicting metal solubilities in highly concentrated, multicomponent aqueous solutions is difficult due to poorly understood ion-ion and ion-solvent interactions. Aluminum hydroxide solid phase solubility in concentrated sodium hydroxide (NaOH) solutions is one such case, with major implications for ore refining, as well as processing of radioactive waste stored at U.S. Department of Energy legacy sites, such as the Hanford Site, Washington State. The solubility of gibbsite (α-Al(OH)3) is often not well predicted because other ions affect the activity of hydroxide (OH-) and aluminate (Al(OH)4-) anions. In the present study, we systematically examined the influence of key anions, nitrite (NO2-) and nitrate (NO3-), as sodium salts on the solubility of α-Al(OH)3 in NaOH solutions taking care to establish equilibrium from both under- and oversaturation. Rapid equilibration was enabled by use of a highly pure and crystalline synthetic nano-gibbsite of well-defined particle size and shape. Measured dissolved aluminum concentrations were compared with those predicted by an α-Al(OH)3 solubility model derived for simple Al(OH)4-/OH- systems. Specific anion effects were expressed as an enhancement factor (Alenhc) conveying the excess of dissolved aluminum. At 45 °C, NaNO2 and NaNO3-containing systems exhibited Alenhc values of 2.70 and 1.88, respectively, indicating significant enhancement. The solutions were examined by Raman and high-field 27Al NMR spectroscopy, indicating specific interactions including Al(OH)4--Na+ contact ion pairing and Al(OH)4--NO2-/NO3- ion-ion interactions. Dynamic evolution of the α-Al(OH)3 particles including growth and agglomeration was observed revealing the importance of dissolution/reprecipitation in establishing equilibrium. These studies indicate that incomplete ion hydration, as a result of the low water activity in these concentrated electrolytes, results in: (i) enhanced reactivity of the hydroxide ion with respect to α-Al(OH)3; (ii) increased concentrations of Al(OH)4- in solution; and (iii) stronger ion-ion interactions that act to stabilize the supersaturated solutions. This information on the mechanisms by which α-Al(OH)3 becomes supersaturated is essential for more energy-efficient aluminum processing technologies, including the treatment of millions of gallons of Al(OH)4--rich high-level radioactive waste.
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Affiliation(s)
- Mateusz Dembowski
- Pacific Northwest National Laboratory, Richland, Washington 99352, USA.
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14
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Dembowski M, Pilgrim CD, Hickam S, Spano T, Hamlin D, Oliver AG, Casey WH, Burns PC. Dynamics of Cation-Induced Conformational Changes in Nanometer-Sized Uranyl Peroxide Clusters. Inorg Chem 2020; 59:2495-2502. [PMID: 32017549 DOI: 10.1021/acs.inorgchem.9b03390] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Conformational changes of the pyrophosphate (Pp)-functionalized uranyl peroxide nanocluster [(UO2)24(O2)24(P2O7)12]48- ({U24Pp12}), dissolved as a Li/Na salt, can be induced by the titration of alkali cations into solution. The most symmetric conformer of the molecule has idealized octahedral (Oh) molecular symmetry. One-dimensional 31P NMR experiments provide direct evidence that both K+ and Rb+ ions trigger an Oh-to-D4h conformational change within {U24Pp12}. Variable-temperature 31P NMR experiments conducted on partially titrated {U24Pp12} systems show an effect on the rates; increased activation enthalpy and entropy for the D4h-to-Oh transition is observed in the presence of Rb+ compared to K+. Two-dimensional, exchange spectroscopy 31P NMR revealed that magnetization transfer links chemically unique Pp bridges that are present in the D4h conformation and that this magnetization transfer occurs via a conformational rearrangement mechanism as the bridges interconvert between two symmetries. The interconversion is triggered by the departure and reentry of K (or Rb) cations out of and into the cavity of the cluster. This rearrangement allows Pp bridges to interconvert without the need to break bonds. Cs ions exhibit unique interactions with {U24Pp12} clusters and cause only minor changes in the solution 31P NMR signatures, suggesting that Oh symmetry is conserved. Single-crystal X-ray diffraction measurements reveal that the mixed Li/Na/Cs salt adopts D2h molecular symmetry, implying that while solvated, this cluster is in equilibrium with a more symmetric form. These results highlight the unusually flexible nature of the actinide-based {U24Pp12} and its sensitivity to countercations in solution.
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Affiliation(s)
- Mateusz Dembowski
- Department of Chemistry and Biochemistry , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Corey D Pilgrim
- Department of Chemistry , University of California , Davis , California 95616 , United States
| | - Sarah Hickam
- Department of Civil and Environmental Engineering and Earth Sciences , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Tyler Spano
- Department of Civil and Environmental Engineering and Earth Sciences , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Dallas Hamlin
- Department of Civil and Environmental Engineering and Earth Sciences , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - Allen G Oliver
- Department of Chemistry and Biochemistry , University of Notre Dame , Notre Dame , Indiana 46556 , United States
| | - William H Casey
- Department of Chemistry , University of California , Davis , California 95616 , United States.,Department of Earth and Planetary Sciences , University of California , Davis , California 95616 , United States
| | - Peter C Burns
- Department of Chemistry and Biochemistry , University of Notre Dame , Notre Dame , Indiana 46556 , United States.,Department of Civil and Environmental Engineering and Earth Sciences , University of Notre Dame , Notre Dame , Indiana 46556 , United States
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15
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Burton‐Pye BP, Dembowski M, Lukens WW, Cruz A, Althour A, Lopez GE, Salcedo R, Gallagher CMB, McGregor D, Francesconi LC. Synthesis and Characterization of Non‐Aqueous [Tc
X
M‐PW
11
O
39
]
n
–
with M = O, N: Comparing Tc
V
and Tc
VI
in Metal Oxide Matrices. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201900864] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Benjamin P. Burton‐Pye
- Lehman College of the City University of New York 250 Bedford Park Boulevard West Bronx NY 10468 USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
| | - Mateusz Dembowski
- Hunter College of the City University of New York 695 Park Avenue New York NY 10065 USA
| | - Wayne W. Lukens
- Chemical Sciences Division The Glenn T. Seaborg Center E.O. Lawrence Berkeley National Laboratory (LBNL) One Cyclotron Road Berkeley California 94720 USA
| | - Anthony Cruz
- Lehman College of the City University of New York 250 Bedford Park Boulevard West Bronx NY 10468 USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
| | - Alrasheed Althour
- Lehman College of the City University of New York 250 Bedford Park Boulevard West Bronx NY 10468 USA
| | - Gustavo E. Lopez
- Lehman College of the City University of New York 250 Bedford Park Boulevard West Bronx NY 10468 USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
| | - Ramsey Salcedo
- Lehman College of the City University of New York 250 Bedford Park Boulevard West Bronx NY 10468 USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
- Hunter College of the City University of New York 695 Park Avenue New York NY 10065 USA
| | - Colleen M. B. Gallagher
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
- Hunter College of the City University of New York 695 Park Avenue New York NY 10065 USA
| | - Donna McGregor
- Lehman College of the City University of New York 250 Bedford Park Boulevard West Bronx NY 10468 USA
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
| | - Lynn C. Francesconi
- Ph.D. Program in Chemistry Graduate Center of the City University of New York New York NY 10016 USA
- Hunter College of the City University of New York 695 Park Avenue New York NY 10065 USA
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16
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Graham TR, Hu JZ, Zhang X, Dembowski M, Jaegers NR, Wan C, Bowden M, Lipton AS, Felmy AR, Clark SB, Rosso KM, Pearce CI. Unraveling Gibbsite Transformation Pathways into LiAl-LDH in Concentrated Lithium Hydroxide. Inorg Chem 2019; 58:12385-12394. [DOI: 10.1021/acs.inorgchem.9b02000] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Trent R. Graham
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- The Voiland School of Chemical and Biological Engineering, Washington State University, Pullman, Washington 99164, United States
| | - Jian Zhi Hu
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Biological Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Xin Zhang
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Mateusz Dembowski
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Nicholas R. Jaegers
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Biological Science Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Chuan Wan
- Institute for Integrated Catalysis, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Mark Bowden
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Andrew S. Lipton
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Andrew R. Felmy
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Sue B. Clark
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
- Materials Science and Engineering Program, Washington State University, Pullman, Washington 99164, United States
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Kevin M. Rosso
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Carolyn I. Pearce
- Energy and Environment Directorate, Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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17
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Hickam S, Ray D, Szymanowski JES, Li RY, Dembowski M, Smith P, Gagliardi L, Burns PC. Neptunyl Peroxide Chemistry: Synthesis and Spectroscopic Characterization of a Neptunyl Triperoxide Compound, Ca2[NpO2(O2)3]·9H2O. Inorg Chem 2019; 58:12264-12271. [DOI: 10.1021/acs.inorgchem.9b01712] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sarah Hickam
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Debmalya Ray
- Department of Chemistry, Chemical Theory Center, and Minnesota Supercomputing Institute, University of Minnesota, Minneapolis, Minnesota 55455, 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
| | - Ru-Ye Li
- Department of Chemistry, Chemical Theory Center, and 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
| | - Philip Smith
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Laura Gagliardi
- Department of Chemistry, Chemical Theory Center, and 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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18
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Arteaga A, Zhang L, Hickam S, Dembowski M, Burns PC, Nyman M. Uranyl–Peroxide Capsule Self‐Assembly in Slow Motion. Chemistry 2019; 25:6087-6091. [DOI: 10.1002/chem.201806227] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 03/05/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Ana Arteaga
- Department of Chemistry Oregon State University Corvallis OR 97330 USA
| | - Lei Zhang
- Department of Civil and Environmental Engineering and Earth Sciences University of Notre Dame Notre Dame IN 46556 USA
| | - Sarah Hickam
- Department of Civil and Environmental Engineering and Earth Sciences University of Notre Dame Notre Dame IN 46556 USA
| | - Mateusz Dembowski
- Department of Civil and Environmental Engineering and Earth Sciences University of Notre Dame Notre Dame IN 46556 USA
- Current address: Pacific Northwest National Laboratory Richland WA 99352 USA
| | - Peter C. Burns
- Department of Civil and Environmental Engineering and Earth Sciences University of Notre Dame Notre Dame IN 46556 USA
| | - May Nyman
- Department of Chemistry Oregon State University Corvallis OR 97330 USA
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19
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Zhang L, Dembowski M, Arteaga A, Hickam S, Martin NP, Zakharov LN, Nyman M, Burns PC. Energetic Trends in Monomer Building Blocks for Uranyl Peroxide Clusters. Inorg Chem 2018; 58:439-445. [DOI: 10.1021/acs.inorgchem.8b02661] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lei Zhang
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Mateusz Dembowski
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Ana Arteaga
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Sarah Hickam
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Nicolas P. Martin
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - Lev N. Zakharov
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, United States
| | - May Nyman
- Department of Chemistry, Oregon State University, Corvallis, Oregon 97331, 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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20
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Graham TR, Han KS, Dembowski M, Krzysko AJ, Zhang X, Hu J, Clark SB, Clark AE, Schenter GK, Pearce CI, Rosso KM. 27Al Pulsed Field Gradient, Diffusion–NMR Spectroscopy of Solvation Dynamics and Ion Pairing in Alkaline Aluminate Solutions. J Phys Chem B 2018; 122:10907-10912. [DOI: 10.1021/acs.jpcb.8b10145] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Trent R. Graham
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- The Voiland School of Chemical and Biological Engineering, Washington State University, Pullman, Washington 99164, United States
| | - Kee Sung Han
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Mateusz Dembowski
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Anthony J. Krzysko
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Xin Zhang
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Jianzhi Hu
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Sue B. Clark
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Aurora E. Clark
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Gregory K. Schenter
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Carolyn I. Pearce
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
| | - Kevin M. Rosso
- Pacific Northwest National Laboratory, Richland, Washington 99354, United States
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21
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Pouvreau M, Dembowski M, Clark SB, Reynolds JG, Rosso KM, Schenter GK, Pearce CI, Clark AE. Ab Initio Molecular Dynamics Reveal Spectroscopic Siblings and Ion Pairing as New Challenges for Elucidating Prenucleation Aluminum Speciation. J Phys Chem B 2018; 122:7394-7402. [PMID: 29936837 DOI: 10.1021/acs.jpcb.8b04377] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The characterization of prenucleation species is essential to understand crystallization mechanisms across many chemical systems and often involves the use of vibrational spectroscopy. Nowhere is this more evident than in the development of "green" aluminum processing technologies, where detailed understanding of the speciation of aluminum and its polynuclear analogues in highly alkaline, low water solutions is elusive. The aluminate anion Al(OH)4- predominates in alkaline conditions, yet equilibrium with dimeric species, either μ-oxo Al2O(OH)62- or di-μ-hydroxo Al2(OH)82-, can be assumed. Using ab initio molecular dynamics with full solvation and the presence of counterions, this work reconciles previous contradictory studies that had concluded only a single species under relevant solution conditions. We reveal that the two dimers are energetically separated by 2 kcal/mol in pure water but that the stability of each can be reversed by ion pairing expected in saturated salt solutions. Simulated Raman and IR spectra for each species (accounting for anharmonicity and the fluctuating solvating environment) provide the first proof that the considered species are "spectroscopic siblings", whose multiple overlapping bands prevent definitive assertions in terms of speciation when compared to the experimental spectra. These observations are likely to hold in higher order aluminate oligomers and as such present a massive challenge toward understanding the crystallization mechanisms relevant to aluminum processing.
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Affiliation(s)
- Maxime Pouvreau
- Department of Chemistry , Washington State University , Pullman , Washington, D.C. 99164 , United States
| | - Mateusz Dembowski
- Pacific Northwest National Laboratory , Richland , Washington, D.C. 99352 , United States
| | - Sue B Clark
- Department of Chemistry , Washington State University , Pullman , Washington, D.C. 99164 , United States.,Pacific Northwest National Laboratory , Richland , Washington, D.C. 99352 , United States
| | - Jacob G Reynolds
- Washington River Protection Solutions, LLC , Richland , Washington, D.C. 99352 , United States
| | - Kevin M Rosso
- Pacific Northwest National Laboratory , Richland , Washington, D.C. 99352 , United States
| | - Gregory K Schenter
- Pacific Northwest National Laboratory , Richland , Washington, D.C. 99352 , United States
| | - Carolyn I Pearce
- Pacific Northwest National Laboratory , Richland , Washington, D.C. 99352 , United States
| | - Aurora E Clark
- Department of Chemistry , Washington State University , Pullman , Washington, D.C. 99164 , United States
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22
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Graham TR, Dembowski M, Martinez-Baez E, Zhang X, Jaegers NR, Hu J, Gruszkiewicz MS, Wang HW, Stack AG, Bowden ME, Delegard CH, Schenter GK, Clark AE, Clark SB, Felmy AR, Rosso KM, Pearce CI. In Situ 27Al NMR Spectroscopy of Aluminate in Sodium Hydroxide Solutions above and below Saturation with Respect to Gibbsite. Inorg Chem 2018; 57:11864-11873. [PMID: 30036042 DOI: 10.1021/acs.inorgchem.8b00617] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Trent R. Graham
- The Voiland School of Chemical and Biological Engineering, Washington State University, Pullman, Washington 99164, United States
| | - Mateusz Dembowski
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Ernesto Martinez-Baez
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Xin Zhang
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Nicholas R. Jaegers
- The Voiland School of Chemical and Biological Engineering, Washington State University, Pullman, Washington 99164, United States
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Jianzhi Hu
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | | | - Hsiu-Wen Wang
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Andrew G. Stack
- Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Mark E. Bowden
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | | | - Gregory K. Schenter
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Aurora E. Clark
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Sue B. Clark
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Andrew R. Felmy
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
- Department of Chemistry, Washington State University, Pullman, Washington 99164, United States
| | - Kevin M. Rosso
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
| | - Carolyn I. Pearce
- Pacific Northwest National Laboratory, Richland, Washington 99352, United States
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23
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Hickam S, Aksenov SM, Dembowski M, Perry SN, Traustason H, Russell M, Burns PC. Complexity of Uranyl Peroxide Cluster Speciation from Alkali-Directed Oxidative Dissolution of Uranium Dioxide. Inorg Chem 2018; 57:9296-9305. [DOI: 10.1021/acs.inorgchem.8b01299] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sarah Hickam
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Sergey M. Aksenov
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Mateusz Dembowski
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Samuel N. Perry
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Hrafn Traustason
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Meghan Russell
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, 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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24
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Oliveri AF, Colla CA, Callahan JR, Bogard G, Qiu J, Dembowski M, Burns PC, Casey WH. Front Cover: Cation‐Directed Isomerization of the U
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Uranyl‐Peroxide Cluster (Eur. J. Inorg. Chem. 46/2017). Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201701348] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Anna F. Oliveri
- Department of Chemistry Southern Oregon University 97520 Ashland Oregon USA
| | - Christopher A. Colla
- Department of Earth and Planetary Sciences University of California 95616 Davis California USA
| | - Joseph R. Callahan
- Department of Chemistry University of California 95616 Davis California USA
| | - Gwendolyn Bogard
- Department of Chemistry Southern Oregon University 97520 Ashland Oregon USA
| | - Jie Qiu
- Department of Civil and Environmental Engineering and Earth Sciences; University of Notre Dame 46556 South Bend Indiana USA
| | - Mateusz Dembowski
- Department of Chemistry and Biochemistry University of Notre Dame 46556 South Bend Indiana USA
| | - Peter C. Burns
- Department of Civil and Environmental Engineering and Earth Sciences; University of Notre Dame 46556 South Bend Indiana USA
- Department of Chemistry and Biochemistry University of Notre Dame 46556 South Bend Indiana USA
| | - William H. Casey
- Department of Earth and Planetary Sciences University of California 95616 Davis California USA
- Department of Chemistry University of California 95616 Davis California USA
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25
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Oliveri AF, Colla CA, Callahan JR, Bogard G, Qiu J, Dembowski M, Burns PC, Casey WH. Cation‐Directed Isomerization of the U
28
Uranyl‐Peroxide Cluster. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201701349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Anna F. Oliveri
- Department of Chemistry Southern Oregon University 97520 Ashland Oregon USA
| | - Christopher A. Colla
- Department of Earth and Planetary Sciences University of California 95616 Davis California USA
| | - Joseph R. Callahan
- Department of Chemistry University of California 95616 Davis California USA
| | - Gwendolyn Bogard
- Department of Chemistry Southern Oregon University 97520 Ashland Oregon USA
| | - Jie Qiu
- Department of Civil and Environmental Engineering and Earth Sciences; University of Notre Dame 46556 South Bend Indiana USA
| | - Mateusz Dembowski
- Department of Chemistry and Biochemistry University of Notre Dame 46556 South Bend Indiana USA
| | - Peter C. Burns
- Department of Civil and Environmental Engineering and Earth Sciences; University of Notre Dame 46556 South Bend Indiana USA
- Department of Chemistry and Biochemistry University of Notre Dame 46556 South Bend Indiana USA
| | - William H. Casey
- Department of Earth and Planetary Sciences University of California 95616 Davis California USA
- Department of Chemistry University of California 95616 Davis California USA
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26
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Oliveri AF, Colla CA, Callahan JR, Bogard G, Qiu J, Dembowski M, Burns PC, Casey WH. Cation‐Directed Isomerization of the U
28
Uranyl‐Peroxide Cluster. Eur J Inorg Chem 2017. [DOI: 10.1002/ejic.201701074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Anna F. Oliveri
- Department of Chemistry Southern Oregon University 97520 Ashland Oregon USA
| | - Christopher A. Colla
- Department of Earth and Planetary Sciences University of California 95616 Davis California USA
| | - Joseph R. Callahan
- Department of Chemistry University of California 95616 Davis California USA
| | - Gwendolyn Bogard
- Department of Chemistry Southern Oregon University 97520 Ashland Oregon USA
| | - Jie Qiu
- Department of Civil and Environmental Engineering and Earth Sciences; University of Notre Dame 46556 South Bend Indiana USA
| | - Mateusz Dembowski
- Department of Chemistry and Biochemistry University of Notre Dame 46556 South Bend Indiana USA
| | - Peter C. Burns
- Department of Civil and Environmental Engineering and Earth Sciences; University of Notre Dame 46556 South Bend Indiana USA
- Department of Chemistry and Biochemistry University of Notre Dame 46556 South Bend Indiana USA
| | - William H. Casey
- Department of Earth and Planetary Sciences University of California 95616 Davis California USA
- Department of Chemistry University of California 95616 Davis California USA
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27
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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28
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Dembowski M, Colla CA, Yu P, Qiu J, Szymanowski JES, Casey WH, Burns PC. The Propensity of Uranium-Peroxide Systems to Preserve Nanosized Assemblies. Inorg Chem 2017; 56:9602-9608. [DOI: 10.1021/acs.inorgchem.7b01095] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mateusz Dembowski
- Department of Chemistry
and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Christopher A. Colla
- Department of Earth and Planetary Sciences, University of California, Davis, California 95616, United States
| | - Ping Yu
- The Keck NMR Facility, University of California, Davis, California 95616, United States
| | - Jie Qiu
- 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
| | - William H. Casey
- Department of Earth and Planetary Sciences, University of California, Davis, California 95616, United States
- Department of Chemistry, University of California, Davis, California 95616, United States
| | - Peter C. Burns
- Department of Chemistry
and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Civil and Environmental Engineering
and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
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29
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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30
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Dembowski M, Colla CA, Hickam S, Oliveri AF, Szymanowski JES, Oliver AG, Casey WH, Burns PC. Hierarchy of Pyrophosphate-Functionalized Uranyl Peroxide Nanocluster Synthesis. Inorg Chem 2017; 56:5478-5487. [DOI: 10.1021/acs.inorgchem.7b00649] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Mateusz Dembowski
- Department
of Chemistry and Biochemistry and §Department of Civil and Environmental Engineering
and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Earth and Planetary
Sciences and ∥Department of Chemistry, University of California, Davis, California 95616, United States
| | - Christopher A. Colla
- Department
of Chemistry and Biochemistry and §Department of Civil and Environmental Engineering
and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Earth and Planetary
Sciences and ∥Department of Chemistry, University of California, Davis, California 95616, United States
| | - Sarah Hickam
- Department
of Chemistry and Biochemistry and §Department of Civil and Environmental Engineering
and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Earth and Planetary
Sciences and ∥Department of Chemistry, University of California, Davis, California 95616, United States
| | - Anna F. Oliveri
- Department
of Chemistry and Biochemistry and §Department of Civil and Environmental Engineering
and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Earth and Planetary
Sciences and ∥Department of Chemistry, University of California, Davis, California 95616, United States
| | - Jennifer E. S. Szymanowski
- Department
of Chemistry and Biochemistry and §Department of Civil and Environmental Engineering
and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Earth and Planetary
Sciences and ∥Department of Chemistry, University of California, Davis, California 95616, United States
| | - Allen G. Oliver
- Department
of Chemistry and Biochemistry and §Department of Civil and Environmental Engineering
and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Earth and Planetary
Sciences and ∥Department of Chemistry, University of California, Davis, California 95616, United States
| | - William H. Casey
- Department
of Chemistry and Biochemistry and §Department of Civil and Environmental Engineering
and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Earth and Planetary
Sciences and ∥Department of Chemistry, University of California, Davis, California 95616, United States
| | - Peter C. Burns
- Department
of Chemistry and Biochemistry and §Department of Civil and Environmental Engineering
and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department of Earth and Planetary
Sciences and ∥Department of Chemistry, University of California, Davis, California 95616, United States
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31
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Qiu J, Spano TL, Dembowski M, Kokot AM, Szymanowski JES, Burns PC. Sulfate-Centered Sodium-Icosahedron-Templated Uranyl Peroxide Phosphate Cages with Uranyl Bridged by μ–η1:η2 Peroxide. Inorg Chem 2017; 56:1874-1880. [DOI: 10.1021/acs.inorgchem.6b02429] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jie Qiu
- Department
of Civil and Environmental Engineering and Earth Sciences and ‡Department of
Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Tyler L. Spano
- Department
of Civil and Environmental Engineering and Earth Sciences and ‡Department of
Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Mateusz Dembowski
- Department
of Civil and Environmental Engineering and Earth Sciences and ‡Department of
Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Alex M. Kokot
- Department
of Civil and Environmental Engineering and Earth Sciences and ‡Department of
Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Jennifer E. S. Szymanowski
- Department
of Civil and Environmental Engineering and Earth Sciences and ‡Department of
Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Peter C. Burns
- Department
of Civil and Environmental Engineering and Earth Sciences and ‡Department of
Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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32
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Dembowski M, Bernales V, Qiu J, Hickam S, Gaspar G, Gagliardi L, Burns PC. Computationally-Guided Assignment of Unexpected Signals in the Raman Spectra of Uranyl Triperoxide Complexes. Inorg Chem 2017; 56:1574-1580. [DOI: 10.1021/acs.inorgchem.6b02666] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mateusz Dembowski
- Department of Chemistry
and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Varinia Bernales
- Department of Chemistry, University of Minnesota, Superconducting Institute, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Jie Qiu
- 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
| | - Gabriel Gaspar
- Department
of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Laura Gagliardi
- Department of Chemistry, University of Minnesota, Superconducting Institute, 207 Pleasant Street SE, Minneapolis, Minnesota 55455, United States
| | - Peter C. Burns
- Department of Chemistry
and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department
of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
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33
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Abstract
Abstract
Uranyl peroxide nanoclusters may impact the mobility and partitioning of uranium at contaminated sites and could be used in the isolation of uranium during the reprocessing of nuclear waste. Their behavior in aqueous systems must be better understood to predict the environmental fate of uranyl peroxide nanoclusters and for their use in engineered systems. The aqueous stability of only one uranyl peroxide nanocluster, U60 (K16Li44[UO2(O2)OH]60), has been studied to date [Flynn, S. L., Szymanowski, J. E. S., Gao, Y., Liu, T., Burns, P. C., Fein, J. B.: Experimental measurements of U60 nanocluster stability in aqueous solution. Geochemica et Cosmochimica Acta 156, 94–105 (2015)]. In this study, we measured the aqueous stability of a second uranyl peroxide nanocluster, U24Py (Na30[(UO2)24(O2)24(HP2O7)6(H2P2O7)6]), in batch systems as a function of time, pH, and nanocluster concentration, and then compared the aqueous behavior of U24Py to U60 to determine whether the size and morphology differences result in differences in their aqueous behaviors. Systems containing U24Py nanoclusters took over 30 days to achieve steady-state concentrations of monomeric U, Na, and P, illustrating slower reaction kinetics than parallel U60 systems. Furthermore, U24Py exhibited lower stability in solution than U60, with an average of 72% of the total mass in each nanocluster suspension being associated with the U24Py nanocluster, whereas 97% was associated with the U60 nanocluster in parallel experiments [Flynn, S. L., Szymanowski, J. E. S., Gao, Y., Liu, T., Burns, P. C., Fein, J. B.: Experimental measurements of U60 nanocluster stability in aqueous solution. Geochemica et Cosmochimica Acta 156, 94–105 (2015)]. The measurements from the batch experiments were used to calculate ion activity product (IAP) values for the reaction between the U24Py nanocluster and its constituent monomeric aqueous species. The IAP values, calculated assuming the activity of the U24Py nanocluster is equal to its concentration in solution, exhibit a significantly lower nanocluster concentration dependence than those IAP values calculated assuming an activity of 1 for the nanocluster. The inclusion of a deprotonation reaction for U24Py minimizes the pH dependence of the calculated IAP values. The modeling results suggest that the U24Py nanocluster experiences sequential deprotonation. Taken together, the results indicate that the aqueous behavior of the U24Py nanocluster, like that of U60, is best described as that of an aqueous complex.
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Affiliation(s)
- Shannon L. Flynn
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN 46556, United States of America
| | - Jennifer E. S. Szymanowski
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN 46556, United States of America
| | - Mateusz Dembowski
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, United States of America
| | - Peter C. Burns
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN 46556, United States of America
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, IN 46556, United States of America
| | - Jeremy B. Fein
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, IN 46556, United States of America
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35
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Dembowski M, Olds TA, Pellegrini KL, Hoffmann C, Wang X, Hickam S, He J, Oliver AG, Burns PC. Solution 31P NMR Study of the Acid-Catalyzed Formation of a Highly Charged {U24Pp12} Nanocluster, [(UO2)24(O2)24(P2O7)12]48–, and Its Structural Characterization in the Solid State Using Single-Crystal Neutron Diffraction. J Am Chem Soc 2016; 138:8547-53. [DOI: 10.1021/jacs.6b04028] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mateusz Dembowski
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Travis A. Olds
- 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
| | - Christina Hoffmann
- Chemical
and Engineering Materials Division, Oak Ridge National Laboratory, Oak
Ridge, Tennessee 37831, United States
| | - Xiaoping Wang
- Chemical
and Engineering Materials Division, Oak Ridge National Laboratory, Oak
Ridge, Tennessee 37831, United States
| | - Sarah Hickam
- Department
of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Junhong He
- Instrument
and Source Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Allen G. Oliver
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Peter C. Burns
- Department
of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
- Department
of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
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36
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Qiu J, Dembowski M, Szymanowski JES, Toh WC, Burns PC. Time-Resolved X-ray Scattering and Raman Spectroscopic Studies of Formation of a Uranium-Vanadium-Phosphorus-Peroxide Cage Cluster. Inorg Chem 2016; 55:7061-7. [DOI: 10.1021/acs.inorgchem.6b00918] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jie Qiu
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Mateusz Dembowski
- Department
of Chemistry and Biochemistry, 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
| | - Wen Cong Toh
- Department of Civil and Environmental Engineering and Earth Sciences, University of Notre Dame, Notre Dame, Indiana 46556, 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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37
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Abstract
Translocation of preproteins across the mitochondrial outer membrane is mediated by the translocase of the outer mitochondrial membrane (TOM) complex. We report the molecular identification of Tom6 and Tom7, two small subunits of the TOM core complex in the fungus Neurospora crassa. Cross-linking experiments showed that both proteins were found to be in direct contact with the major component of the pore, Tom40. In addition, Tom6 was observed to interact with Tom22 in a manner that depends on the presence of preproteins in transit. Precursors of both proteins are able to insert into the outer membrane in vitro and are assembled into authentic TOM complexes. The insertion pathway of these proteins shares a common binding site with the general import pathway as the assembly of both Tom6 and Tom7 was competed by a matrix-destined precursor protein. This assembly was dependent on the integrity of receptor components of the TOM machinery and is highly specific as in vitro-synthesized yeast Tom6 was not assembled into N. crassa TOM complex. The targeting and assembly information within the Tom6 sequence was found to be located in the transmembrane segment and a flanking segment toward the N-terminal, cytosolic side. A hybrid protein composed of the C-terminal domain of yeast Tom6 and the cytosolic domain of N. crassa Tom6 was targeted to the mitochondria but was not taken up into TOM complexes. Thus, both segments are required for assembly into the TOM complex. A model for the topogenesis of the small Tom subunits is discussed.
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Affiliation(s)
- M Dembowski
- Institut für Physiologische Chemie der Universität München, 80336 München, Germany
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38
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Abstract
A multisubunit complex in the mitochondrial outer membrane, the TOM complex, mediates targeting and membrane translocation of nuclear-encoded preproteins. We have isolated the TOM holo complex, containing the preprotein receptor components Tom70 and Tom20, and the TOM core complex, which lacks these receptors. The interaction of recombinant mitochondrial preproteins with both types of soluble TOM complex was analyzed. Preproteins bound efficiently in a specific manner to the isolated complexes in the absence of chaperones and lipids in a bilayer structure. Using fluorescence correlation spectroscopy, a dissociation constant in the nanomolar range was determined. The affinity was lower when the preprotein was stabilized in its folded conformation. Following the initial binding, the presequence was transferred into the translocation pore in a step that required unfolding of the mature part of the preprotein. This translocation step was also mediated by protease-treated TOM holo complex, which contains almost exclusively Tom40. Thus, the TOM core complex, consisting of Tom40, Tom22, Tom6 and Tom7, is a molecular machine that can recognize and partially translocate mitochondrial precursor proteins.
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Affiliation(s)
- T Stan
- Institut für Physiologische Chemie der Universität München, Goethestrabetae 33, D-80336 München, Germany
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Scharfe C, Zaccaria P, Hoertnagel K, Jaksch M, Klopstock T, Dembowski M, Lill R, Prokisch H, Gerbitz KD, Neupert W, Mewes HW, Meitinger T. MITOP, the mitochondrial proteome database: 2000 update. Nucleic Acids Res 2000; 28:155-8. [PMID: 10592209 PMCID: PMC102491 DOI: 10.1093/nar/28.1.155] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
MITOP (http://www.mips.biochem.mpg.de/proj/medgen/mitop/) is a comprehensive database for genetic and functional information on both nuclear- and mitochondrial-encoded proteins and their genes. The five species files--Saccharomyces cerevisiae, Mus musculus, Caenorhabditis elegans, Neurospora crassa and Homo sapiens--include annotated data derived from a variety of online resources and the literature. A wide spectrum of search facilities is given in the overlapping sections 'Gene catalogues', 'Protein catalogues', 'Homologies', 'Pathways and metabolism' and 'Human disease catalogue' including extensive references and hyperlinks to other databases. Central features are the results of various homology searches, which should facilitate the investigations into interspecies relationships. Precomputed FASTA searches using all the MITOP yeast protein entries and a list of the best human EST hits with graphical cluster alignments related to the yeast reference sequence are presented. The orthologue tables with cross-listings to all the protein entries for each species in MITOP have been expanded by adding the genomes of Rickettsia prowazeckii and Escherichia coli. To find new mitochondrial proteins the complete yeast genome has been analyzed using the MITOPROT program which identifies mitochondrial targeting sequences. The 'Human disease catalogue' contains tables with a total of 110 human diseases related to mitochondrial protein abnormalities, sorted by clinical criteria and age of onset. MITOP should contribute to the systematic genetic characterization of the mitochondrial proteome in relation to human disease.
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Affiliation(s)
- C Scharfe
- Medizinische Genetik, Ludwig-Maximilians-Universität, München, Germany
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40
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Abstract
Members of the Hsp100/Clp-family of molecular chaperones form regulatory subunits of ATP-dependent Clp proteases and fulfill crucial roles for cellular thermotolerance. We have identified a Clp-like protein in Saccharomyces cerevisiae, Mcx1p, which shares approximately 30% sequence identity with ClpX-proteins in bacteria, plants and nematodes. Mcx1p localizes to the matrix space of mitochondria and is peripherally associated with the inner membrane. A homologue of E. coli ClpP protease was not identified when screening the yeast genome. We therefore propose that Mcx1p represents a novel molecular chaperone of mitochondria with non-proteolytic function.
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Affiliation(s)
- L van Dyck
- Institut für Physiologische Chemie der Universität München, Munich, Germany
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41
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Rapaport D, Künkele KP, Dembowski M, Ahting U, Nargang FE, Neupert W, Lill R. Dynamics of the TOM complex of mitochondria during binding and translocation of preproteins. Mol Cell Biol 1998; 18:5256-62. [PMID: 9710610 PMCID: PMC109111 DOI: 10.1128/mcb.18.9.5256] [Citation(s) in RCA: 66] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Translocation of preproteins across the mitochondrial outer membrane is mediated by the TOM complex. This complex consists of receptor components for the initial contact with preproteins at the mitochondrial surface and membrane-embedded proteins which promote transport and form the translocation pore. In order to understand the interplay between the translocating preprotein and the constituents of the TOM complex, we analyzed the dynamics of the TOM complex of Neurospora crassa and Saccharomyces cerevisiae mitochondria by following the structural alterations of the essential pore component Tom40 during the translocation of preproteins. Tom40 exists in a homo-oligomeric assembly and dynamically interacts with Tom6. The Tom40 assembly is influenced by a block of negatively charged amino acid residues in the cytosolic domain of Tom22, indicating a cross-talk between preprotein receptors and the translocation pore. Preprotein binding to specific sites on either side of the outer membrane (cis and trans sites) induces distinct structural alterations of Tom40. To a large extent, these changes are mediated by interaction with the mitochondrial targeting sequence. We propose that such targeting sequence-induced adaptations are a critical feature of translocases in order to facilitate the movement of preproteins across cellular membranes.
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Affiliation(s)
- D Rapaport
- Institut für Physiologische Chemie, Physikalische Biochemie und Zellbiologie der Universität München, 80336 Munich, Germany
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Künkele KP, Heins S, Dembowski M, Nargang FE, Benz R, Thieffry M, Walz J, Lill R, Nussberger S, Neupert W. The preprotein translocation channel of the outer membrane of mitochondria. Cell 1998; 93:1009-19. [PMID: 9635430 DOI: 10.1016/s0092-8674(00)81206-4] [Citation(s) in RCA: 305] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The preprotein translocase of the outer membrane of mitochondria (TOM complex) facilitates the recognition, insertion, and translocation of nuclear-encoded mitochondrial preproteins. We have purified the TOM complex from Neurospora crassa and analyzed its composition and functional properties. The TOM complex contains a cation-selective high-conductance channel. Upon reconstitution into liposomes, it mediates integration of proteins into and translocation across the lipid bilayer. TOM complex particles have a diameter of about 138 A, as revealed by electron microscopy and image analysis; they contain two or three centers of stain-filled openings, which we interpret as pores with an apparent diameter of about 20 A. We conclude that the structure reported here represents the protein-conducting channel of the mitochondrial outer membrane.
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Affiliation(s)
- K P Künkele
- Institut für Physiologische Chemie, Physikalische Biochemie, und Zellbiologie der Universität München, Germany
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