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Lu X, Geletii YV, Cheng T, Hill CL. Role of Multiple Vanadium Centers on Redox Buffering and Rates of Polyvanadomolybdate-Cu(II)-Catalyzed Aerobic Oxidations. Inorg Chem 2023; 62:5822-5830. [PMID: 36977374 PMCID: PMC10091476 DOI: 10.1021/acs.inorgchem.3c00469] [Citation(s) in RCA: 1] [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: 03/30/2023]
Abstract
A recent report established that the tetrabutylammonium (TBA) salt of hexavanadopolymolybdate TBA4H5[PMo6V6O40] (PV6Mo6) serves as the redox buffer with Cu(II) as a co-catalyst for aerobic deodorization of thiols in acetonitrile. Here, we document the profound impact of vanadium atom number (x = 0-4 and 6) in TBA salts of PVxMo12-xO40(3+x)- (PVMo) on this multicomponent catalytic system. The PVMo cyclic voltammetric peaks from 0 to -2000 mV vs Fc/Fc+ under catalytic conditions (acetonitrile, ambient T) are assigned and clarify that the redox buffering capability of the PVMo/Cu catalytic system derives from the number of steps, the number of electrons transferred each step, and the potential ranges of each step. All PVMo are reduced by varying numbers of electrons, from 1 to 6, in different reaction conditions. Significantly, PVMo with x ≤ 3 not only has much lower activity than when x > 3 (for example, the turnover frequencies (TOF) of PV3Mo9 and PV4Mo8 are 8.9 and 48 s-1, respectively) but also, unlike the latter, cannot maintain steady reduction states when the Mo atoms in these polyoxometalate (POMs) are also reduced. Stopped-flow kinetics measurements reveal that Mo atoms in Keggin PVMo exhibit much slower electron transfer rates than V atoms. There are two kinetic arguments: (a) In acetonitrile, the first formal potential of PMo12 is more positive than that of PVMo11 (-236 and -405 mV vs Fc/Fc+); however, the initial reduction rates are 1.06 × 10-4 s-1 and 0.036 s-1 for PMo12 and PVMo11, respectively. (b) In aqueous sulfate buffer (pH = 2), a two-step kinetics is observed for PVMo11 and PV2Mo10, where the first and second steps are assigned to reduction of the V and Mo centers, respectively. Since fast and reversible electron transfers are key for the redox buffering behavior, the slower electron transfer kinetics of Mo preclude these centers functioning in redox buffering that maintains the solution potential. We conclude that PVMo with more vanadium atoms allows the POM to undergo more and faster redox changes, which enables the POM to function as a redox buffer dictating far higher catalytic activity.
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Affiliation(s)
- Xinlin Lu
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Yurii V Geletii
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Ting Cheng
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Craig L Hill
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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2
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Xu Z, Hou B, Zhao F, Suo S, Liu Y, Shi H, Cai Z, Hill CL, Musaev DG, Mecklenburg M, Cronin SB, Lian T. Direct In Situ Measurement of Quantum Efficiencies of Charge Separation and Proton Reduction at TiO 2-Protected GaP Photocathodes. J Am Chem Soc 2023; 145:2860-2869. [PMID: 36715560 PMCID: PMC9912250 DOI: 10.1021/jacs.2c10578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Photoelectrochemical solar fuel generation at the semiconductor/liquid interface consists of multiple elementary steps, including charge separation, recombination, and catalytic reactions. While the overall incident light-to-current conversion efficiency (IPCE) can be readily measured, identifying the microscopic efficiency loss processes remains difficult. Here, we report simultaneous in situ transient photocurrent and transient reflectance spectroscopy (TRS) measurements of titanium dioxide-protected gallium phosphide photocathodes for water reduction in photoelectrochemical cells. Transient reflectance spectroscopy enables the direct probe of the separated charge carriers responsible for water reduction to follow their kinetics. Comparison with transient photocurrent measurement allows the direct probe of the initial charge separation quantum efficiency (ϕCS) and provides support for a transient photocurrent model that divides IPCE into the product of quantum efficiencies of light absorption (ϕabs), charge separation (ϕCS), and photoreduction (ϕred), i.e., IPCE = ϕabsϕCSϕred. Our study shows that there are two general key loss pathways: recombination within the bulk GaP that reduces ϕCS and interfacial recombination at the junction that decreases ϕred. Although both loss pathways can be reduced at a more negative applied bias, for GaP/TiO2, the initial charge separation loss is the key efficiency limiting factor. Our combined transient reflectance and photocurrent study provides a time-resolved view of microscopic steps involved in the overall light-to-current conversion process and provides detailed insights into the main loss pathways of the photoelectrochemical system.
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Affiliation(s)
- Zihao Xu
- Department
of Chemistry, Emory University, 1515 Dickey Dr, Atlanta, Georgia30322, United States,ZJU-Hangzhou
Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, Zhejiang310014, China
| | - Bingya Hou
- Department
of Electrical Engineering, University of
South California, 3710 McClintock Ave, Los Angeles, California90089, United States
| | - Fengyi Zhao
- Department
of Chemistry, Emory University, 1515 Dickey Dr, Atlanta, Georgia30322, United States
| | - Sa Suo
- Department
of Chemistry, Emory University, 1515 Dickey Dr, Atlanta, Georgia30322, United States
| | - Yawei Liu
- Department
of Chemistry, Emory University, 1515 Dickey Dr, Atlanta, Georgia30322, United States
| | - Haotian Shi
- Department
of Chemistry, University of South California, 3710 McClintock Ave, Los Angeles, California90089, United States
| | - Zhi Cai
- Department
of Electrical Engineering, University of
South California, 3710 McClintock Ave, Los Angeles, California90089, United States
| | - Craig L. Hill
- Department
of Chemistry, Emory University, 1515 Dickey Dr, Atlanta, Georgia30322, United States
| | - Djamaladdin G. Musaev
- Department
of Chemistry, Emory University, 1515 Dickey Dr, Atlanta, Georgia30322, United States,Cherry
L. Emerson Centre for Scientific Computation, Emory University, 1515 Dickey Drive, Atlanta, Georgia30322, United
States
| | - Matthew Mecklenburg
- Core Center
of Excellence in Nano Imaging (CNI), University
of South California, 814 Bloom Walk, Los Angeles, California90089, United States
| | - Stephen B. Cronin
- Department
of Electrical Engineering, University of
South California, 3710 McClintock Ave, Los Angeles, California90089, United States,Department
of Chemistry, University of South California, 3710 McClintock Ave, Los Angeles, California90089, United States,
| | - Tianquan Lian
- Department
of Chemistry, Emory University, 1515 Dickey Dr, Atlanta, Georgia30322, United States,
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3
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Lu X, Cheng T, Geletii YV, Hill CL. Catalytic System for Aerobic Oxidation That Simultaneously Functions as Its Own Redox Buffer. Inorg Chem 2023; 62:2404-2414. [PMID: 36696689 PMCID: PMC9906773 DOI: 10.1021/acs.inorgchem.2c04209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The control of the solution electrochemical potential as well as pH impacts products in redox reactions, but the former gets far less attention. Redox buffers facilitate the maintenance of potentials and have been noted in diverse cases, but they have not been a component of catalytic systems. We report a catalytic system that contains its own built-in redox buffer. Two highly synergistic components (a) the tetrabutylammonium salt of hexavanadopolymolybdate TBA4H5[PMo6V6O40] (PV6Mo6) and (b) Cu(ClO4)2 in acetonitrile catalyze the aerobic oxidative deodorization of thiols by conversion to the corresponding nonodorous disulfides at 23 °C (each catalyst alone is far less active). For example, the reaction of 2-mercaptoethanol with ambient air gives a turnover number (TON) = 3 × 102 in less than one hour with a turnover frequency (TOF) of 6 × 10-2 s-1 with respect to PV6Mo6. Multiple electrochemical, spectroscopic, and other methods establish that (1) PV6Mo6, a multistep and multielectron redox buffering catalyst, controls the speciation and the ratio of Cu(II)/Cu(I) complexes and thus keeps the solution potential in different narrow ranges by involving multiple POM redox couples and simultaneously functions as an oxidation catalyst that receives electrons from the substrate; (2) Cu catalyzes two processes simultaneously, oxidation of the RSH by PV6Mo6 and reoxidation of reduced PV6Mo6 by O2; and (3) the analogous polytungstate-based system, TBA4H5[PW6V6O40] (PV6W6), has nearly identical cyclic voltammograms (CV) as PV6Mo6 but has almost no catalytic activity: it does not exhibit self-redox buffering.
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4
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Snider VG, Hill CL. Functionalized reactive polymers for the removal of chemical warfare agents: A review. J Hazard Mater 2023; 442:130015. [PMID: 36166906 DOI: 10.1016/j.jhazmat.2022.130015] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 09/11/2022] [Accepted: 09/15/2022] [Indexed: 06/16/2023]
Abstract
Protection from and removal of chemical warfare agents (CWAs) from the environment remains a global goal. Activated charcoal, metal oxides, metal organic frameworks (MOFs), polyoxometalates (POMs) and reactive polymers have all been investigated for CWA removal. Composite polymeric materials are rapidly gaining traction as versatile building blocks for personal protective equipment (PPE) and catalytic devices. Polymers are inexpensive to produce and easily engineered into a wide range of materials including films, electro-spun fibers, mixed-matrix membranes/reactors, and other forms. When containing reactive side-chains, hydrolysis catalysts, and/or oxidative catalysts polymeric devices are primed for CWA decontamination. In this review, recent advances in reactive polymeric materials for CWA removal are summarized. To aid in comparing the effectiveness of the different solid catalysts, particular attention is paid to the stoichiometric ratio of reactive species to toxic substrate (CWA or CWA simulant).
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Affiliation(s)
| | - Craig L Hill
- Department of Chemistry, Emory University, Atlanta, GA 30322, USA.
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5
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Xu Z, Hou B, Zhao F, Cai Z, Liu Y, Hill CL, Musaev DG, Mecklenburg M, Cronin SB, Lian T. Correction to Nanoscale TiO 2 Protection Layer Enhances the Built-In Field and Charge Separation Performance of GaP Photoelectrodes. Nano Lett 2022; 22:3173. [PMID: 35357168 DOI: 10.1021/acs.nanolett.2c01063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
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6
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Tao M, Yin Q, Kaledin AL, Uhlikova N, Lu X, Cheng T, Chen YS, Lian T, Geletii YV, Musaev DG, Bacsa J, Hill CL. Structurally Precise Two-Transition-Metal Water Oxidation Catalysts: Quantifying Adjacent 3d Metals by Synchrotron X-Radiation Anomalous Dispersion Scattering. Inorg Chem 2022; 61:6252-6262. [PMID: 35416667 DOI: 10.1021/acs.inorgchem.2c00446] [Citation(s) in RCA: 2] [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
Mixed 3d metal oxides are some of the most promising water oxidation catalysts (WOCs), but it is very difficult to know the locations and percent occupancies of different 3d metals in these heterogeneous catalysts. Without such information, it is hard to quantify catalysis, stability, and other properties of the WOC as a function of the catalyst active site structure. This study combines the site selective synthesis of a homogeneous WOC with two adjacent 3d metals, [Co2Ni2(PW9O34)2]10- (Co2Ni2P2) as a tractable molecular model for CoNi oxide, with the use of multiwavelength synchrotron X-radiation anomalous dispersion scattering (synchrotron XRAS) that quantifies both the location and percent occupancy of Co (∼97% outer-central-belt positions only) and Ni (∼97% inner-central-belt positions only) in Co2Ni2P2. This mixed-3d-metal complex catalyzes water oxidation an order of magnitude faster than its isostructural analogue, [Co4(PW9O34)2]10- (Co4P2). Four independent and complementary lines of evidence confirm that Co2Ni2P2 and Co4P2 are the principal WOCs and that Co2+(aq) is not. Density functional theory (DFT) studies revealed that Co4P2 and Co2Ni2P2 have similar frontier orbitals, while stopped-flow kinetic studies and DFT calculations indicate that water oxidation by both complexes follows analogous multistep mechanisms, including likely Co-OOH formation, with the energetics of most steps being lower for Co2Ni2P2 than for Co4P2. Synchrotron XRAS should be generally applicable to active-site-structure-reactivity studies of multi-metal heterogeneous and homogeneous catalysts.
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Affiliation(s)
- Meilin Tao
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Qiushi Yin
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Alexey L Kaledin
- Emerson Center for Scientific Computation, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Natalie Uhlikova
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Xinlin Lu
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Ting Cheng
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Yu-Sheng Chen
- ChemMatCARS/The University of Chicago, 9700 S. Cass Ave, Lemont, Illinois 60439, United States
| | - Tianquan Lian
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Yurii V Geletii
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Djamaladdin G Musaev
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States.,Emerson Center for Scientific Computation, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - John Bacsa
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
| | - Craig L Hill
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, Georgia 30322, United States
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7
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Snider VG, Alshehri R, Slaugenhaupt RM, Hill CL. Materials for the Simultaneous Entrapment and Catalytic Aerobic Oxidative Removal of Sulfur Mustard Simulants. ACS Appl Mater Interfaces 2021; 13:51519-51524. [PMID: 34665594 DOI: 10.1021/acsami.1c15588] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Materials that both sequester chemical warfare agents (CWAs) and then catalytically decontaminate the entrapped CWAs are highly sought. This article reports such a system for air-based catalytic removal of the sulfur mustard (HD) simulant, 2-chloroethyl ethyl sulfide (CEES). Hypercrosslinked polymers (HCPs) sequester CEES, and an HCP-embedded oxidation system comprising tribromide, nitrate, and acid (NOxBrxH+) simultaneously catalyzes the aerobic and selective, oxidative conversion of the entrapped CEES to the desired far less-toxic sulfoxide under ambient conditions (air and temperature). (NOxBrxH+) has been incorporated into three HCPs, a fluorobenzene HCP (HCP-F), a methylated HCP (HCP-M), and an HCP with acidic moieties (HCP-A). HCP-A acts as both an absorbing material and a catalytic component due to its acidic side chains. All three HCP/NOxBrxH+ systems work rapidly under these optimally mild conditions. No light or added oxidants are required. The HCP/NOxBrxH+ systems are recyclable.
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Affiliation(s)
- Victoria G Snider
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Rawan Alshehri
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | | | - Craig L Hill
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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8
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Xu Z, Hou B, Zhao F, Cai Z, Shi H, Liu Y, Hill CL, Musaev DG, Mecklenburg M, Cronin SB, Lian T. Nanoscale TiO 2 Protection Layer Enhances the Built-In Field and Charge Separation Performance of GaP Photoelectrodes. Nano Lett 2021; 21:8017-8024. [PMID: 34569798 DOI: 10.1021/acs.nanolett.1c02257] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Nanoscale oxide layer protected semiconductor photoelectrodes show enhanced stability and performance for solar fuels generation, although the mechanism for the performance enhancement remains unclear due to a lack of understanding of the microscopic interfacial field and its effects. Here, we directly probe the interfacial fields at p-GaP electrodes protected by n-TiO2 and its effect on charge carriers by transient reflectance spectroscopy. Increasing the TiO2 layer thickness from 0 to 35 nm increases the field in the GaP depletion region, enhancing the rate and efficiency of interfacial electron transfer from the GaP to TiO2 on the ps time scale as well as retarding interfacial recombination on the microsecond time scale. This study demonstrates a general method for providing a microscopic view of the photogenerated charge carrier's pathway and loss mechanisms from the bulk of the electrode to the long-lived separated charge at the interface that ultimately drives the photoelectrochemical reactions.
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Affiliation(s)
- Zihao Xu
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Bingya Hou
- Departments of Electrical Engineering and Chemistry, University of South California, 3710 McClintock Avenue, Los Angeles, California 90089, United States
| | - Fengyi Zhao
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Zhi Cai
- Departments of Electrical Engineering and Chemistry, University of South California, 3710 McClintock Avenue, Los Angeles, California 90089, United States
| | - Haotian Shi
- Departments of Electrical Engineering and Chemistry, University of South California, 3710 McClintock Avenue, Los Angeles, California 90089, United States
| | - Yawei Liu
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Craig L Hill
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Djamaladdin G Musaev
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
- Cherry L. Emerson Centre for Scientific Computation, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Matthew Mecklenburg
- Core Center of Excellence in Nano Imaging (CNI), University of South California, 814 Bloom Walk, Los Angeles, California 90089, United States
| | - Stephen B Cronin
- Departments of Electrical Engineering and Chemistry, University of South California, 3710 McClintock Avenue, Los Angeles, California 90089, United States
| | - Tianquan Lian
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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9
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Rasch L, Boers M, Lems W, van Schaardenburg D, Proudman S, Hill CL, Duarte C, Kuriya B, Davis B, Hoogland W, Voshaar M, van Tuyl L. Patient perspective on remission in rheumatoid arthritis: Validation of patient reported outcome instruments to measure absence of disease activity. Semin Arthritis Rheum 2021; 51:1360-1369. [PMID: 34538513 DOI: 10.1016/j.semarthrit.2021.07.005] [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: 01/25/2021] [Revised: 06/11/2021] [Accepted: 07/05/2021] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Patients have identified pain, fatigue and independence as the most important domains that need to be improved to define remission in rheumatoid arthritis (RA). This study identified and validated instruments for these domains and evaluated their added value to the ACR/EULAR Boolean remission definition. METHODS Patients with a 28-joint Disease Activity Score (DAS28) ≤3.2 or in self-perceived remission (declaring their disease activity 'as good as gone') from the Netherlands, Portugal, Australia, and Canada, were assessed at 0, 3 and 6 months for patient-reported outcomes and the WHO-ILAR RA core set. Instrument validity was evaluated cross-sectionally, longitudinally and for the ability to predict future good outcome in terms of physical functioning. Logistic regression quantified the added value to Boolean remission. RESULTS Of 246 patients, 152 were also assessed at 3, and 142 at 6 months. Most instruments demonstrated construct validity and discriminative capacity. Pain and fatigue were best captured by a simple numerical rating scale (NRS). Measurement of independence proved more complex, but a newly developed independence NRS was preferred. NRS for pain, fatigue and independence, in addition to or instead of patient global assessment did not add enough information to justify modification of the current Boolean definition of remission in RA. CONCLUSION Key elements of the patient perspective on remission in RA can be captured by NRS pain, fatigue, and independence. Although this study did not find conclusive evidence to improve the current definition of remission in RA, the information from these instruments adds value to the physician's assessment of remission and further bridges the gap between physician and patient.
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Affiliation(s)
- L Rasch
- Amsterdam Rheumatology and immunology Center, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands.
| | - M Boers
- Amsterdam Rheumatology and immunology Center, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands; Epidemiology and Data Science, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands.
| | - W Lems
- Amsterdam Rheumatology and immunology Center, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands; Amsterdam Rheumatology and immunology Center, Reade, Amsterdam, Netherlands.
| | - D van Schaardenburg
- Amsterdam Rheumatology and immunology Center, Reade, Amsterdam, Netherlands; Amsterdam Rheumatology and immunology Center, Amsterdam UMC, University of Amsterdam, Amsterdam, Netherlands.
| | - S Proudman
- Rheumatology Unit, Royal Adelaide Hospital, and Discipline of Medicine, University of Adelaide, Adelaide, Australia.
| | - C L Hill
- Rheumatology Unit, Royal Adelaide Hospital, and Discipline of Medicine, University of Adelaide, Adelaide, Australia; Rheumatology Unit, The Queen Elizabeth Hospital, Adelaide, Australia.
| | - C Duarte
- Department of Rheumatology, Centro Hospitalar Universitario de Coimbra, Coimbra, Portugal; iCBR-Coimbra Institute for Clinical and Biomedical Research, Faculty of Medicine, University of Coimbra, Coimbra, Portugal.
| | - B Kuriya
- Division of Rheumatology, Mount Sinai Hospital, University of Toronto, Toronto, Canada.
| | | | | | - M Voshaar
- Patient Research Partner; Department of Pharmacy, Sint Maartenskliniek, Netherlands; Department of Pharmacy, Radboudumc, Nijmegen, Netherlands.
| | - L van Tuyl
- Amsterdam Rheumatology and immunology Center, Amsterdam UMC, Vrije Universiteit Amsterdam, Amsterdam, Netherlands; Netherlands Institute for Health Services Research, Utrecht, Netherlands.
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Collins-Wildman DL, Sullivan KP, Geletii YV, Snider VG, Gordon WO, Balboa A, Tian Y, Slaugenhaupt RM, Kaledin AL, Karwacki CJ, Frenkel AI, Musaev DG, Hill CL. A solvent-free solid catalyst for the selective and color-indicating ambient-air removal of sulfur mustard. Commun Chem 2021; 4:33. [PMID: 36697596 PMCID: PMC9814880 DOI: 10.1038/s42004-021-00465-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Accepted: 01/27/2021] [Indexed: 01/28/2023] Open
Abstract
Bis(2-chloroethyl) sulfide or sulfur mustard (HD) is one of the highest-tonnage chemical warfare agents and one that is highly persistent in the environment. For decontamination, selective oxidation of HD to the substantially less toxic sulfoxide is crucial. We report here a solvent-free, solid, robust catalyst comprising hydrophobic salts of tribromide and nitrate, copper(II) nitrate hydrate, and a solid acid (NafionTM) for selective sulfoxidation using only ambient air at room temperature. This system rapidly removes HD as a neat liquid or a vapor. The mechanisms of these aerobic decontamination reactions are complex, and studies confirm reversible formation of a key intermediate, the bromosulfonium ion, and the role of Cu(II). The latter increases the rate four-fold by increasing the equilibrium concentration of bromosulfonium during turnover. Cu(II) also provides a colorimetric detection capability. Without HD, the solid is green, and with HD, it is brown. Bromine K-edge XANES and EXAFS studies confirm regeneration of tribromide under catalytic conditions. Diffuse reflectance infrared Fourier transform spectroscopy shows absorption of HD vapor and selective conversion to the desired sulfoxide, HDO, at the gas-solid interface.
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Affiliation(s)
| | - Kevin P. Sullivan
- grid.189967.80000 0001 0941 6502Department of Chemistry, Emory University, Atlanta, GA 30322 USA
| | - Yurii V. Geletii
- grid.189967.80000 0001 0941 6502Department of Chemistry, Emory University, Atlanta, GA 30322 USA
| | - Victoria G. Snider
- grid.189967.80000 0001 0941 6502Department of Chemistry, Emory University, Atlanta, GA 30322 USA
| | - Wesley O. Gordon
- grid.420176.6U.S. Army Combat Capabilities Development Command Chemical Biological Center, Aberdeen, MD 21010 USA
| | - Alex Balboa
- grid.420176.6U.S. Army Combat Capabilities Development Command Chemical Biological Center, Aberdeen, MD 21010 USA
| | - Yiyao Tian
- grid.36425.360000 0001 2216 9681Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY 11794 USA
| | - Rachel M. Slaugenhaupt
- grid.189967.80000 0001 0941 6502Department of Chemistry, Emory University, Atlanta, GA 30322 USA
| | - Alexey L. Kaledin
- grid.189967.80000 0001 0941 6502Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, GA 30322 USA
| | - Christopher J. Karwacki
- grid.420176.6U.S. Army Combat Capabilities Development Command Chemical Biological Center, Aberdeen, MD 21010 USA
| | - Anatoly I. Frenkel
- grid.36425.360000 0001 2216 9681Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, NY 11794 USA ,grid.202665.50000 0001 2188 4229Chemistry Division, Brookhaven National Laboratory, Upton, NY 11973 USA
| | - Djamaladdin G. Musaev
- grid.189967.80000 0001 0941 6502Department of Chemistry, Emory University, Atlanta, GA 30322 USA ,grid.189967.80000 0001 0941 6502Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, GA 30322 USA
| | - Craig L. Hill
- grid.189967.80000 0001 0941 6502Department of Chemistry, Emory University, Atlanta, GA 30322 USA
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11
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Davis CR, Ruediger CD, Dyer KA, Lester S, Graf SW, Kroon FPB, Whittle SL, Hill CL. Colchicine is not effective for reducing osteoarthritic hand pain compared to placebo: a randomised, placebo-controlled trial (COLAH). Osteoarthritis Cartilage 2021; 29:208-214. [PMID: 33232804 DOI: 10.1016/j.joca.2020.11.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 10/14/2020] [Accepted: 11/10/2020] [Indexed: 02/02/2023]
Abstract
BACKGROUND Colchicine may offer relief in osteoarthritis. This has never been investigated for hand osteoarthritis. OBJECTIVES To investigate the effect of 1 mg daily colchicine vs placebo on hand pain and function over 12 weeks in older adults with hand osteoarthritis. METHODS Community-dwelling adults with diagnosed osteoarthritis of the hand aged 40-80 years were randomised to receive colchicine (0.5 mg twice daily) or matching placebo. Primary outcome measure was VAS hand pain score (0-100 mm). Secondary outcome measures included tender and swollen joint count, grip strength, C-reactive protein, and Michigan Hand Questionnaire total, function and pain scores. In an exploratory assessment, we compared synovial grade and power Doppler. All outcome measures were obtained at baseline and week 12. Stata v16 was used to perform constrained longitudinal data analysis models. RESULTS 64 adults (54 females, 10 males) aged 48-79 years of age were enrolled. 59 participants completed the study (N = 28 colchicine, N = 31 placebo) (withdrawal rate 8%). Adverse reactions to the study medication occurred in nine patients. VAS score was not significantly different at baseline (61 ± 17 mm in the colchicine, 64 ± 17 mm in the placebo group). Between-group difference for VAS score at week 12 was 7.6 mm (95% CI -3.5-18.7, p-value 0.18). There were no significant differences between groups for any secondary outcomes at baseline or week 12. CONCLUSIONS 1 mg colchicine daily for 12 weeks was not effective for reducing pain, tender and swollen joint count or increasing grip strength in symptomatic hand osteoarthritis. Our results do not support the use of colchicine in hand osteoarthritis.
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Affiliation(s)
- C R Davis
- Discipline of Medicine, University of Adelaide, Adelaide, South Australia 5000, Australia; Rheumatology Department, Queen Elizabeth Hospital, Woodville South, South Australia 5000, Australia.
| | - C D Ruediger
- Discipline of Medicine, University of Adelaide, Adelaide, South Australia 5000, Australia; Rheumatology Department, Queen Elizabeth Hospital, Woodville South, South Australia 5000, Australia.
| | - K A Dyer
- Rheumatology Department, Queen Elizabeth Hospital, Woodville South, South Australia 5000, Australia
| | - S Lester
- Discipline of Medicine, University of Adelaide, Adelaide, South Australia 5000, Australia; Rheumatology Department, Queen Elizabeth Hospital, Woodville South, South Australia 5000, Australia
| | - S W Graf
- Wakefield Rheumatology, Adelaide, South Australia 5000, Australia
| | - F P B Kroon
- Department of Rheumatology, Leiden University Medical Center (LUMC), Leiden, the Netherlands
| | - S L Whittle
- Discipline of Medicine, University of Adelaide, Adelaide, South Australia 5000, Australia; Rheumatology Department, Queen Elizabeth Hospital, Woodville South, South Australia 5000, Australia
| | - C L Hill
- Discipline of Medicine, University of Adelaide, Adelaide, South Australia 5000, Australia; Rheumatology Department, Queen Elizabeth Hospital, Woodville South, South Australia 5000, Australia
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12
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Pathmanathan K, Robinson PC, Hill CL, Keen HI. The prevalence of gout and hyperuricaemia in Australia: An updated systematic review. Semin Arthritis Rheum 2020; 51:121-128. [PMID: 33360648 DOI: 10.1016/j.semarthrit.2020.12.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [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: 10/01/2020] [Revised: 11/30/2020] [Accepted: 12/07/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND Gout continues to increase in prevalence in developed countries with Oceanic countries particularly affected. Both gout and hyperuricaemia are associated with the metabolic syndrome and its sequelae. Recently, the Australian Institute for Health and Welfare (AIHW) reported a prevalence rate of 0.8% which appeared incongruous with other published research. Thus, an updated systematic review was undertaken to review the literature on the prevalence of gout and hyperuricaemia in Australia from data published after 2011. METHODS A comprehensive, systematic search was conducted in MEDLINE, Embase and Web of Science in addition to relevant websites to identify research reporting the prevalence of gout and/or hyperuricaemia in Australia from May 2011 until June 2020. Crude gout and hyperuricaemia prevalence data was obtained and presented alongside case ascertainment, time-period, age range and stratified by gender if available. RESULTS 118 full text articles were screened. 12 articles were included for analysis of gout prevalence. 4 articles were identified for the hyperuricaemia analysis. Wide variation in prevalence figures exist largely due study design and sample age range. Studies using a case definition of self-reported diagnosis of gout reported prevalence rates between 4.5% and 6.8%. The remaining studies used either electronic coding data from general practitioners or wastewater estimation of allopurinol consumption and documented adult prevalence rates between 1.5% and 2.9%. Prevalence increases with age, male sex and over time in keeping with global data. Hyperuricaemia prevalence ranged between 10.5% and 16.6% in Caucasian or an Australian representative population. AIHW estimates applied a chronic condition status, defined as current and lasted or expected to last more than six months, to cases of gout in the Australian National Health Survey. This likely results in an under-estimation in reported Australian gout prevalence rates. CONCLUSIONS Gout is highly prevalent in Australia compared to global comparisons and continues to increase over time. Hyperuricaemia prevalence is also high although contemporary data is limited.
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Affiliation(s)
- K Pathmanathan
- Department of Rheumatology, Fiona Stanley Hospital, Perth, Australia.
| | - Philip C Robinson
- University of Queensland, Faculty of Medicine, Queensland, Australia
| | - C L Hill
- Rheumatology Unit, The Queen Elizabeth Hospital, Woodville, Australia; Rheumatology Unit, Royal Adelaide Hospital, Adelaide, Australia; Discipline of Medicine, University of Adelaide, Adelaide, Australia
| | - H I Keen
- Department of Rheumatology, Fiona Stanley Hospital, Perth, Australia; School of Medicine and Pharmacology, University of Western Australia, Perth, Australia
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13
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Kaledin AL, Yin Q, Hill CL, Lian T, Musaev DG. Ion-pairing in polyoxometalate chemistry: impact of fully hydrated alkali metal cations on properties of the keggin [PW 12O 40] 3- anion. Dalton Trans 2020; 49:11170-11178. [PMID: 32748937 DOI: 10.1039/d0dt02239j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The counterions of polyoxometalates (POMs) impact properties and applications of this growing class of inorganic clusters. Here, we used density functional theory (DFT) to elucidate the impact of fully hydrated alkali metal cations on the geometry, electronic structure, and chemical properties of the polyoxotungstate anion [PW12O40]3-. The calculations show that the HOMO of the free anion [PW12O40]3- is a linear combination of the 2p AOs of the bridging oxygens, and the first few LUMOs are the 5d orbitals of the tungsten atoms. The S0→ S1 electron excitation, near 3 eV, is associated with the O(2p) → W(5d) transition. Anion/cation complexation leads to formation of [PW12O40]3-[M+(H2O)16]3 ion-pair complexes, where with the increase of atomic number of M, the M+(H2O)16 cluster releases several water molecules and interacts strongly with the polyoxometalate anion. For M = Li, Na and K, [PW12O40]3-[M+(H2O)16]3 is characterized as a "hydrated" ion-pair complex. However, for M = Rb and Cs, it is a "contact" ion-pair complex, where the strong anion-cation interaction makes it a better electron acceptor than the "hydrated" ion-pair complexes. Remarkably, the electronic excitations in the visible part of the absorption spectrum of these complexes are predominantly solvent-to-POM charge transfer transitions (i.e. intermolecular CT). The ratio of the number of intermolecular charge transfer transitions to the number of O(2p)-to-W(5d) valence (i.e. intramolecular) transitions increases with the increasing atomic number of the alkali metals.
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Affiliation(s)
- Alexey L Kaledin
- Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, USA.
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14
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Ebrahim AM, Plonka AM, Tian Y, Senanayake SD, Gordon WO, Balboa A, Wang H, Collins-Wildman DL, Hill CL, Musaev DG, Morris JR, Troya D, Frenkel AI. Multimodal Characterization of Materials and Decontamination Processes for Chemical Warfare Protection. ACS Appl Mater Interfaces 2020; 12:14721-14738. [PMID: 31815428 DOI: 10.1021/acsami.9b19494] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
This Review summarizes the recent progress made in the field of chemical threat reduction by utilizing new in situ analytical techniques and combinations thereof to study multifunctional materials designed for capture and decomposition of nerve gases and their simulants. The emphasis is on the use of in situ experiments that simulate realistic operating conditions (solid-gas interface, ambient pressures and temperatures, time-resolved measurements) and advanced synchrotron methods, such as in situ X-ray absorption and scattering methods, a combination thereof with other complementary measurements (e.g., XPS, Raman, DRIFTS, NMR), and theoretical modeling. The examples presented in this Review range from studies of the adsorption and decomposition of nerve agents and their simulants on Zr-based metal organic frameworks to Nb and Zr-based polyoxometalates and metal (hydro)oxide materials. The approaches employed in these studies ultimately demonstrate how advanced synchrotron-based in situ X-ray absorption spectroscopy and diffraction can be exploited to develop an atomic- level understanding of interfacial binding and reaction of chemical warfare agents, which impacts the development of novel filtration media and other protective materials.
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Affiliation(s)
- Amani M Ebrahim
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Anna M Plonka
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Yiyao Tian
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Sanjaya D Senanayake
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Wesley O Gordon
- U.S. Army Combat Capabilities Development Command Chemical Biological Center, Aberdeen Proving Ground, Maryland 21010, United States
| | - Alex Balboa
- U.S. Army Combat Capabilities Development Command Chemical Biological Center, Aberdeen Proving Ground, Maryland 21010, United States
| | - Hui Wang
- U.S. Army Combat Capabilities Development Command Chemical Biological Center, Aberdeen Proving Ground, Maryland 21010, United States
| | | | - Craig L Hill
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Djamaladdin G Musaev
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
- Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States
| | - John R Morris
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Diego Troya
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Anatoly I Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
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15
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Grissom TG, Plonka AM, Sharp CH, Ebrahim AM, Tian Y, Collins-Wildman DL, Kaledin AL, Siegal HJ, Troya D, Hill CL, Frenkel AI, Musaev DG, Gordon WO, Karwacki CJ, Mitchell MB, Morris JR. Metal-Organic Framework- and Polyoxometalate-Based Sorbents for the Uptake and Destruction of Chemical Warfare Agents. ACS Appl Mater Interfaces 2020; 12:14641-14661. [PMID: 31994872 DOI: 10.1021/acsami.9b20833] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The threat of chemical warfare agents (CWAs), assured by their ease of synthesis and effectiveness as a terrorizing weapon, will persist long after the once-tremendous stockpiles in the U.S. and elsewhere are finally destroyed. As such, soldier and civilian protection, battlefield decontamination, and environmental remediation from CWAs remain top national security priorities. New chemical approaches for the fast and complete destruction of CWAs have been an active field of research for many decades, and new technologies have generated immense interest. In particular, our research team and others have shown metal-organic frameworks (MOFs) and polyoxometalates (POMs) to be active for sequestering CWAs and even catalyzing the rapid hydrolysis of agents. In this Forum Article, we highlight recent advancements made in the understanding and evaluation of POMs and Zr-based MOFs as CWA decontamination materials. Specifically, our aim is to bridge the gap between controlled, solution-phase laboratory studies and real-world or battlefield-like conditions by examining agent-material interactions at the gas-solid interface utilizing a multimodal experimental and computational approach. Herein, we report our progress in addressing the following research goals: (1) elucidating molecular-level mechanisms of the adsorption, diffusion, and reaction of CWA and CWA simulants within a series of Zr-based MOFs, such as UiO-66, MOF-808, and NU-1000, and POMs, including Cs8Nb6O19 and (Et2NH2)8[(α-PW11O39Zr(μ-OH)(H2O))2]·7H2O, (2) probing the effects that common ambient gases, such as CO2, SO2, and NO2, have on the efficacy of the MOF and POM materials for CWA destruction, and (3) using CWA simulant results to develop hypotheses for live agent chemistry. Key hypotheses are then tested with targeted live agent studies. Overall, our collaborative effort has provided insight into the fundamental aspects of agent-material interactions and revealed strategies for new catalyst development.
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Affiliation(s)
- Tyler G Grissom
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Anna M Plonka
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Conor H Sharp
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Amani M Ebrahim
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Yiyao Tian
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | | | - Alexey L Kaledin
- Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States
| | - Harrison J Siegal
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Diego Troya
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Craig L Hill
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Anatoly I Frenkel
- Department of Materials Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
- Chemistry Division, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - Djamaladdin G Musaev
- Cherry L. Emerson Center for Scientific Computation, Emory University, Atlanta, Georgia 30322, United States
| | - Wesley O Gordon
- U.S. Army Combat Capabilities Development Command Chemical Biological Center, Aberdeen Proving Ground, Aberdeen, Maryland 21010, United States
| | - Christopher J Karwacki
- U.S. Army Combat Capabilities Development Command Chemical Biological Center, Aberdeen Proving Ground, Aberdeen, Maryland 21010, United States
| | - Mark B Mitchell
- Department of Chemistry, Kennesaw State University, Kennesaw, Georgia 30144, United States
| | - John R Morris
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
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16
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Tao M, Li Y, Li Y, Zhang X, Geletii YV, Wang X, Hill CL. Heterogenization of polyoxometalates as solid catalysts in aerobic oxidation of glycerol. Catal Sci Technol 2020. [DOI: 10.1039/d0cy00403k] [Citation(s) in RCA: 5] [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: 12/15/2022]
Abstract
A series of heterogeneous catalysts LnPMo12O40 (L = Al3+, Fe3+, Cr3+, Ti4+, Zr4+, Zn2+) and HxPMo11LO39 (L = Zn2+, Cr3+, Fe3+, Al3+, Ti4+) were prepared using a simple calcination treatment and were evaluated in aerobic oxidation of glycerol.
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Affiliation(s)
- Meilin Tao
- Key Lab of Polyoxometalate Science of Ministry of Education
- Northeast Normal University
- Changchun 130024
- P. R. China
- Department of Chemistry
| | - Yue Li
- Key Lab of Polyoxometalate Science of Ministry of Education
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Yiming Li
- Key Lab of Polyoxometalate Science of Ministry of Education
- Northeast Normal University
- Changchun 130024
- P. R. China
| | - Xueyan Zhang
- Key Lab of Polyoxometalate Science of Ministry of Education
- Northeast Normal University
- Changchun 130024
- P. R. China
| | | | - Xiaohong Wang
- Key Lab of Polyoxometalate Science of Ministry of Education
- Northeast Normal University
- Changchun 130024
- P. R. China
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17
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Tao M, Li Y, Zhang X, Li Z, Hill CL, Wang X. A Polyoxometalate-Based Microfluidic Device for Liquid-Phase Oxidation of Glycerol. ChemSusChem 2019; 12:2550-2553. [PMID: 31056850 DOI: 10.1002/cssc.201901057] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 05/05/2019] [Indexed: 06/09/2023]
Abstract
Peroxidation of glycerol has been carried out in a polyoxometalate (POM)-based microfluidic reactor, which was fabricated on a capillary by using a layer-by-layer strategy. Lactic acid (LA) is produced selectively in high yield with a TOF as high as 20 000 h-1 , compared to a TOF of 200 h-1 in batch mode. This POM microfluidic reactor is readily prepared, scalable, highly stable, reusable, and also potentially applicable to selective oxidation of other bio-wastes.
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Affiliation(s)
- Meilin Tao
- Key Lab of Polyoxometalate Science of Ministry of Education, Northeast Normal University, Changchun, 130024, P.R. China
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, 30322, GA, USA
| | - Yiming Li
- Key Lab of Polyoxometalate Science of Ministry of Education, Northeast Normal University, Changchun, 130024, P.R. China
| | - Xueyan Zhang
- Key Lab of Polyoxometalate Science of Ministry of Education, Northeast Normal University, Changchun, 130024, P.R. China
| | - Zonghang Li
- Key Lab of Polyoxometalate Science of Ministry of Education, Northeast Normal University, Changchun, 130024, P.R. China
| | - Craig L Hill
- Department of Chemistry, Emory University, 1515 Dickey Dr., Atlanta, 30322, GA, USA
| | - Xiaohong Wang
- Key Lab of Polyoxometalate Science of Ministry of Education, Northeast Normal University, Changchun, 130024, P.R. China
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18
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Tian Y, Plonka AM, Ebrahim AM, Palomino RM, Senanayake SD, Balboa A, Gordon WO, Troya D, Musaev DG, Morris JR, Mitchell MB, Collins-Wildman DL, Hill CL, Frenkel AI. Correlated Multimodal Approach Reveals Key Details of Nerve-Agent Decomposition by Single-Site Zr-Based Polyoxometalates. J Phys Chem Lett 2019; 10:2295-2299. [PMID: 31002759 DOI: 10.1021/acs.jpclett.9b01002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Development of technologies for protection against chemical warfare agents (CWAs) is critically important. Recently, polyoxometalates have attracted attention as potential catalysts for nerve-agent decomposition. Improvement of their effectiveness in real operating conditions requires an atomic-level understanding of CWA decomposition at the gas-solid interface. We investigated decomposition of the nerve agent Sarin and its simulant, dimethyl chlorophosphate (DMCP), by zirconium polytungstate. Using a multimodal approach, we showed that upon DMCP and Sarin exposure the dimeric tungstate undergoes monomerization, making coordinatively unsaturated Zr(IV) centers available, which activate nucleophilic hydrolysis. Further, DMCP is shown to be a good model system of reduced toxicity for studies of CWA deactivation at the gas-solid interface.
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Affiliation(s)
- Yiyao Tian
- Department of Materials Science and Chemical Engineering , Stony Brook University , Stony Brook , New York 11794 , United States
| | - Anna M Plonka
- Department of Materials Science and Chemical Engineering , Stony Brook University , Stony Brook , New York 11794 , United States
| | - Amani M Ebrahim
- Department of Materials Science and Chemical Engineering , Stony Brook University , Stony Brook , New York 11794 , United States
| | - Robert M Palomino
- Chemistry Division , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Sanjaya D Senanayake
- Chemistry Division , Brookhaven National Laboratory , Upton , New York 11973 , United States
| | - Alex Balboa
- U.S. Army Edgewood Chemical Biological Center , Aberdeen Proving Ground , Maryland 21010 , United States
| | - Wesley O Gordon
- U.S. Army Edgewood Chemical Biological Center , Aberdeen Proving Ground , Maryland 21010 , United States
| | - Diego Troya
- Department of Chemistry , Virginia Tech , Blacksburg , Virginia 24061 , United States
| | - Djamaladdin G Musaev
- Cherry L. Emerson Center for Scientific Computation , Emory University , Atlanta , Georgia 30322 , United States
- Department of Chemistry , Emory University , Atlanta , Georgia 30322 , United States
| | - John R Morris
- Department of Chemistry , Virginia Tech , Blacksburg , Virginia 24061 , United States
| | - Mark B Mitchell
- Department of Chemistry , Kennesaw State University , Kennesaw , Georgia 30144 , United States
| | | | - Craig L Hill
- Department of Chemistry , Emory University , Atlanta , Georgia 30322 , United States
| | - Anatoly I Frenkel
- Department of Materials Science and Chemical Engineering , Stony Brook University , Stony Brook , New York 11794 , United States
- Chemistry Division , Brookhaven National Laboratory , Upton , New York 11973 , United States
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19
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Kaledin AL, Hill CL, Lian T, Musaev DG. Modulating electronic coupling at the quantum dot/molecule interface by wavefunction engineering. J Chem Phys 2019; 150:124704. [DOI: 10.1063/1.5083056] [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: 11/15/2022] Open
Affiliation(s)
- Alexey L. Kaledin
- Cherry L. Emerson Center for Scientific Computation, Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
| | - Craig L. Hill
- Cherry L. Emerson Center for Scientific Computation, Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
| | - Tianquan Lian
- Cherry L. Emerson Center for Scientific Computation, Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
| | - Djamaladdin G. Musaev
- Cherry L. Emerson Center for Scientific Computation, Department of Chemistry, Emory University, Atlanta, Georgia 30322, USA
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20
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Kaledin AL, Troya D, Karwacki CJ, Balboa A, Gordon WO, Morris JR, Mitchell MB, Frenkel AI, Hill CL, Musaev DG. Key mechanistic details of paraoxon decomposition by polyoxometalates: Critical role of para-nitro substitution. Chem Phys 2019. [DOI: 10.1016/j.chemphys.2018.11.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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21
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Sullivan KP, Wieliczko M, Kim M, Yin Q, Collins-Wildman DL, Mehta AK, Bacsa J, Lu X, Geletii YV, Hill CL. Speciation and Dynamics in the [Co4V2W18O68]10–/Co(II)aq/CoOx Catalytic Water Oxidation System. ACS Catal 2018. [DOI: 10.1021/acscatal.7b01030] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Kevin P. Sullivan
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Marika Wieliczko
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Mooeung Kim
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Qiushi Yin
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | | | - Anil K. Mehta
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - John Bacsa
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Xinlin Lu
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Yurii V. Geletii
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Craig L. Hill
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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22
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Kaledin AL, Hill CL, Lian T, Musaev DG. A bulk adjusted linear combination of atomic orbitals (BA-LCAO) approach for nanoparticles. J Comput Chem 2018; 40:212-221. [PMID: 30284306 DOI: 10.1002/jcc.25373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 04/09/2018] [Revised: 05/15/2018] [Accepted: 05/18/2018] [Indexed: 11/11/2022]
Abstract
We describe a bulk adjusted linear combination of atomic orbitals (BA-LCAO) approach for nanoparticles. In this method, we apply a many-body scaling function (in similar manner as in the environment-modified total energy based tight-binding method) to the DFT-derived diatomic AO interaction potentials (like in the conventional orbital-based density-functional tight binding approach) strictly according to atomic valences acquired naturally in a bulk structure. This modification, (a) facilitates all atom orbital-based electronic structure calculations of charge carrier dynamics in nanoscale structures with a molecular acceptor, and (b) allows to closely match high-level density functional calculation data (previously adjusted to the available experimental findings) for bulk structures. To advance practical application of the BA-LCAO approach we parameterize the Hamiltonian of wurtzite CdSe by fitting its band structure to a high-level DFT reference, corrected for experimentally measured band edges. Here, unlike in conventional DFTB approach, we: (1) use hydrogen-like AOs for the basis as exact atomic eigenfunctions, while orbital energies of which are taken from experimentally measured ionization potentials, and (2) parameterize the many-body scaling functions rather than the atomic wavefunctions. Development of this approach and parameters is guided by our goals to devise a method capable of simultaneously treating the problems of (i) interfacial electron/hole transfer between finite, variable size nanoparticles and electron scavenging molecules, and (ii) high-energy electronic transitions (Auger transitions) that mediate multi-exciton decay in quantum dots. Electronic structure results are described for CdSe quantum dots of various sizes. © 2018 Wiley Periodicals, Inc.
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Affiliation(s)
- Alexey L Kaledin
- Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, 30322, Georgia
| | - Craig L Hill
- Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, 30322, Georgia
| | - Tianquan Lian
- Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, 30322, Georgia
| | - Djamaladdin G Musaev
- Cherry L. Emerson Center for Scientific Computation and Department of Chemistry, Emory University, Atlanta, 30322, Georgia
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Abstract
Polyoxometalate (POM)-based materials of current interest are summarized, and specific types of POM-containing systems are described in which material facilitates multiple complex interactions or catalytic processes. We specifically highlight POM-containing multi-hydrogen-bonding polymers that form gels upon exposure to select organic liquids and simultaneously catalyze hydrolytic or oxidative decontamination, as well as water oxidation catalysts (WOCs) that can be interfaced with light-absorbing photoelectrode materials for photoelectrocatalytic water splitting.
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Affiliation(s)
- Kevin P Sullivan
- Department of Chemistry, Emory University, Atlanta, GA, United States
| | - Qiushi Yin
- Department of Chemistry, Emory University, Atlanta, GA, United States
| | | | - Meilin Tao
- Department of Chemistry, Emory University, Atlanta, GA, United States
| | - Yurii V Geletii
- Department of Chemistry, Emory University, Atlanta, GA, United States
| | - Djamaladdin G Musaev
- Department of Chemistry, Emory University, Atlanta, GA, United States.,Emerson Center for Scientific Computation, Emory University, Atlanta, GA, United States
| | - Tianquan Lian
- Department of Chemistry, Emory University, Atlanta, GA, United States
| | - Craig L Hill
- Department of Chemistry, Emory University, Atlanta, GA, United States
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24
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Shang S, Lin Z, Yin A, Yang S, Chi Y, Wang Y, Dong J, Liu B, Zhen N, Hill CL, Hu C. Self-Assembly of Ln(III)-Containing Tungstotellurates(VI): Correlation of Structure and Photoluminescence. Inorg Chem 2018; 57:8831-8840. [DOI: 10.1021/acs.inorgchem.8b00693] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Shuxia Shang
- Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Zhengguo Lin
- Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Anxiang Yin
- Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Song Yang
- Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Yingnan Chi
- Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Yin Wang
- Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Jing Dong
- Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Bing Liu
- Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Ni Zhen
- Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
| | - Craig L. Hill
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Changwen Hu
- Key Laboratory of Cluster Science, Ministry of Education of China, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P.R. China
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25
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Collins-Wildman DL, Kim M, Sullivan KP, Plonka AM, Frenkel AI, Musaev DG, Hill CL. Buffer-Induced Acceleration and Inhibition in Polyoxometalate-Catalyzed Organophosphorus Ester Hydrolysis. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00394] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
| | | | | | - Anna M. Plonka
- Department of Material Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
| | - Anatoly I. Frenkel
- Department of Material Science and Chemical Engineering, Stony Brook University, Stony Brook, New York 11794, United States
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26
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Kaledin AL, Driscoll DM, Troya D, Collins-Wildman DL, Hill CL, Morris JR, Musaev DG. Impact of ambient gases on the mechanism of [Cs 8Nb 6O 19]-promoted nerve-agent decomposition. Chem Sci 2018; 9:2147-2158. [PMID: 29719688 PMCID: PMC5896467 DOI: 10.1039/c7sc04997h] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Accepted: 01/05/2018] [Indexed: 11/26/2022] Open
Abstract
Polyoxoniobate catalyst, nerve agent decomposition, reaction mechanism, impact of ambient gases on the stability and reactivity of the polyoxoniobate.
The impact of ambient gas molecules (X), NO2, CO2 and SO2 on the structure, stability and decontamination activity of Cs8Nb6O19 polyoxometalate was studied computationally and experimentally. It was found that Cs8Nb6O19 absorbs these molecules more strongly than it adsorbs water and Sarin (GB) and that these interactions hinder nerve agent decontamination. The impacts of diamagnetic CO2 and SO2 molecules on polyoxoniobate Cs8Nb6O19 were fundamentally different from that of NO2 radical. At ambient temperatures, weak coordination of the first NO2 radical to Cs8Nb6O19 conferred partial radical character on the polyoxoniobate and promoted stronger coordination of the second NO2 adsorbent to form a stable diamagnetic Cs8Nb6O19/(NO2)2 species. Moreover, at low temperatures, NO2 radicals formed stable dinitrogen tetraoxide (N2O4) that weakly interacted with Cs8Nb6O19. It was found that both in the absence and presence of ambient gas molecules, GB decontamination by the Cs8Nb6O19 species proceeds via general base hydrolysis involving: (a) the adsorption of water and the nerve agent on Cs8Nb6O19/(X), (b) concerted hydrolysis of a water molecule on a basic oxygen atom of the polyoxoniobate and nucleophilic addition of the nascent OH group to the phosphorus center of Sarin, and (c) rapid reorganization of the formed pentacoordinated-phosphorus intermediate, followed by dissociation of either HF or isopropanol and formation of POM-bound isopropyl methyl phosphonic acid (i-MPA) or methyl phosphonofluoridic acid (MPFA), respectively. The presence of the ambient gas molecules increases the energy of the intermediate stationary points relative to the asymptote of the reactants and slightly increases the hydrolysis barrier. These changes closely correlate with the Cs8Nb6O19–X complexation energy. The most energetically stable intermediates of the GB hydrolysis and decontamination reaction were found to be Cs8Nb6O19/X-MPFA-(i-POH) and Cs8Nb6O19/X-(i-MPA)-HF both in the absence and presence of ambient gas molecules. The high stability of these intermediates is due to, in part, the strong hydrogen bonding between the adsorbates and the protonated [Cs8Nb6O19/X/H]+-core. Desorption of HF or/and (i-POH) and regeneration of the catalyst required deprotonation of the [Cs8Nb6O19/X/H]+-core and protonation of the phosphonic acids i-MPA and MPFA. This catalyst regeneration is shown to be a highly endothermic process, which is the rate-limiting step of the GB hydrolysis and decontamination reaction both in the absence and presence of ambient gas molecules.
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Affiliation(s)
- Alexey L Kaledin
- C. L. Emerson Center for Scientific Computation and Department of Chemistry , Emory University , Atlanta , Georgia 30322 , USA .
| | - Darren M Driscoll
- Department of Chemistry , Virginia Tech , Blacksburg , Virginia , 24061 , USA .
| | - Diego Troya
- Department of Chemistry , Virginia Tech , Blacksburg , Virginia , 24061 , USA .
| | | | - Craig L Hill
- Department of Chemistry , Emory University , Atlanta , Georgia 30322 , USA .
| | - John R Morris
- Department of Chemistry , Virginia Tech , Blacksburg , Virginia , 24061 , USA .
| | - Djamaladdin G Musaev
- C. L. Emerson Center for Scientific Computation and Department of Chemistry , Emory University , Atlanta , Georgia 30322 , USA . .,Department of Chemistry , Virginia Tech , Blacksburg , Virginia , 24061 , USA .
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27
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Liu B, Glass EN, Wang RP, Cui YT, Harada Y, Huang DJ, Schuppler S, Hill CL, de Groot FMF. Cobalt-to-vanadium charge transfer in polyoxometalate water oxidation catalysts revealed by 2p3d resonant inelastic X-ray scattering. Phys Chem Chem Phys 2018; 20:4554-4562. [PMID: 29376165 DOI: 10.1039/c7cp06786k] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
2p3d RIXS spectra reveal electronic structures ofCo4V2WOC, which offers insights into its enhanced catalytic activity thanCo4P2WOC.
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Affiliation(s)
- Boyang Liu
- Inorganic Chemistry & Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- The Netherlands
| | | | - Ru-Pan Wang
- Inorganic Chemistry & Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- The Netherlands
| | - Yi-Tao Cui
- Institute for Solid State Physics
- The University of Tokyo
- Chiba 277-8581
- Japan
| | - Yoshihisa Harada
- Institute for Solid State Physics
- The University of Tokyo
- Chiba 277-8581
- Japan
| | - Di-Jing Huang
- National Synchrotron Radiation Research Center
- Hsinchu 30076
- Taiwan
| | - Stefan Schuppler
- Institut fuer Festkorperphysik
- Karlsruhe Institute of Technology
- Karlsruhe 76021
- Germany
| | | | - Frank M. F. de Groot
- Inorganic Chemistry & Catalysis
- Debye Institute for Nanomaterials Science
- Utrecht University
- The Netherlands
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28
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29
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Kim M, Chamack M, Geletii YV, Hill CL. Synergetic Catalysis of Copper and Iron in Oxidation of Reduced Keggin Heteropolytungstates by Dioxygen. Inorg Chem 2017; 57:311-318. [DOI: 10.1021/acs.inorgchem.7b02506] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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)
- Mooeung Kim
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Masoumeh Chamack
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
- Department
of Chemistry, Tarbiat Modares University, P.O. Box 14155-4383, Tehran, Iran
| | - Yurii V. Geletii
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Craig L. Hill
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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30
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Lauinger SM, Piercy BD, Li W, Yin Q, Collins-Wildman DL, Glass EN, Losego MD, Wang D, Geletii YV, Hill CL. Stabilization of Polyoxometalate Water Oxidation Catalysts on Hematite by Atomic Layer Deposition. ACS Appl Mater Interfaces 2017; 9:35048-35056. [PMID: 28929745 DOI: 10.1021/acsami.7b12168] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Fast and earth-abundant-element polyoxometalates (POMs) have been heavily studied recently as water oxidation catalysts (WOCs) in homogeneous solution. However, POM WOCs can be quite unstable when supported on electrode or photoelectrode surfaces under applied potential. This article reports for the first time that a nanoscale oxide coating (Al2O3) applied by the atomic layer deposition (ALD) aids immobilization and greatly stabilizes this now large family of molecular WOCs when on electrode surfaces. In this study, [{RuIV4(OH)2(H2O)4}(γ-SiW10O34)2]10- (Ru4Si2) is supported on hematite photoelectrodes and then protected by ALD Al2O3; this ternary system was characterized before and after photoelectrocatalytic water oxidation by Fourier transform infrared, X-ray photoelectron spectroscopy, energy-dispersive X-ray, and voltammetry. All these studies indicate that Ru4Si2 remains intact with Al2O3 ALD protection, but not without. The thickness of the Al2O3 layer significantly affects the catalytic performance of the system: a 4 nm thick Al2O3 layer provides optimal performance with nearly 100% faradaic efficiency for oxygen generation under visible-light illumination. Al2O3 layers thicker than 6.5 nm appear to completely bury the Ru4Si2 catalyst, removing all of the catalytic activity, whereas thinner layers are insufficient to maintain a long-term attachment of the catalytic POM.
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Affiliation(s)
- Sarah M Lauinger
- Department of Chemistry, Emory University , 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Brandon D Piercy
- School of Materials Science and Engineering, Georgia Institute of Technology , Love Manufacturing Building, 771 Ferst Drive NW, Atlanta, Georgia 30332, United States
| | - Wei Li
- Department of Chemistry, Merkert Chemistry Center, Boston College , 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Qiushi Yin
- Department of Chemistry, Emory University , 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Daniel L Collins-Wildman
- Department of Chemistry, Emory University , 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Elliot N Glass
- Department of Chemistry, Emory University , 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Mark D Losego
- School of Materials Science and Engineering, Georgia Institute of Technology , Love Manufacturing Building, 771 Ferst Drive NW, Atlanta, Georgia 30332, United States
| | - Dunwei Wang
- Department of Chemistry, Merkert Chemistry Center, Boston College , 2609 Beacon Street, Chestnut Hill, Massachusetts 02467, United States
| | - Yurii V Geletii
- Department of Chemistry, Emory University , 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Craig L Hill
- Department of Chemistry, Emory University , 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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31
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Ting K, Gill TK, Keen H, Tucker GR, Hill CL. Prevalence and associations of gout and hyperuricaemia: results from an Australian population-based study. Intern Med J 2017; 46:566-73. [PMID: 26765205 DOI: 10.1111/imj.13006] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [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: 09/14/2015] [Revised: 12/11/2015] [Accepted: 01/05/2016] [Indexed: 12/27/2022]
Abstract
BACKGROUND Despite gout and hyperuricaemia being major comorbid health issues worldwide, there is a knowledge gap regarding their impact in the Australian community. AIMS To determine the prevalence and associations of self-reported medically diagnosed gout and hyperuricaemia in an Australian population-based cohort. METHODS The North West Adelaide Health Study is a longitudinal cohort study consisting of three stages of data collection. Each stage comprised a self-complete questionnaire, clinic assessment and computer-assisted telephone interview. In Stage 3 (2008-2010), participants were asked if a doctor had ever diagnosed them with gout. Additional data included demographics, comorbidities, laboratory data and Short Form 36 (SF-36). Participants were defined as having gout if they had self-reported medically diagnosed gout or were taking any gout-specific medication (allopurinol, colchicine, probenecid). Hyperuricaemia was defined as a serum uric acid (SUA) level >0.42 mmol/L in men and >0.34 mmol/L in women. RESULTS The overall prevalence of gout was 5.2%. Males were significantly more likely to have gout than females (8.5 vs 2.1%, P < 0.001). The overall prevalence of hyperuricaemia was 16.6%, with being male again identified as a significant risk factor (17.8 vs 15.4%, P < 0.01). Both gout and hyperuricaemia were associated with male sex, body mass index and renal disease after multivariable adjustment. There was no significant difference reported in quality of life (mean SF-36) scores in participants with gout compared to unaffected individuals. CONCLUSION The prevalence of gout and hyperuricaemia is high in the South Australian population. This study emphasises the need for optimal diagnosis and management of gout in Australia.
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Affiliation(s)
- K Ting
- Department of Rheumatology, The Queen Elizabeth Hospital, Adelaide, South Australia, Australia
| | - T K Gill
- School of Medicine, The University of Adelaide, Adelaide, South Australia, Australia
| | - H Keen
- School of Medicine and Pharmacology, University of Western Australia, Perth, Western Australia, Australia
| | - G R Tucker
- School of Medicine, The University of Adelaide, Adelaide, South Australia, Australia
| | - C L Hill
- Department of Rheumatology, The Queen Elizabeth Hospital, Adelaide, South Australia, Australia.,The Health Observatory, Discipline of Medicine, The University of Adelaide, Adelaide, South Australia, Australia
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32
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Soriano-López J, Musaev DG, Hill CL, Galán-Mascarós JR, Carbó JJ, Poblet JM. Tetracobalt-polyoxometalate catalysts for water oxidation: Key mechanistic details. J Catal 2017. [DOI: 10.1016/j.jcat.2017.03.018] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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33
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Plonka AM, Wang Q, Gordon WO, Balboa A, Troya D, Guo W, Sharp CH, Senanayake SD, Morris JR, Hill CL, Frenkel AI. In operando studies of Zr-based MOFs as nerve-agent filtration materials. Acta Crystallogr A Found Adv 2017. [DOI: 10.1107/s0108767317097525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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34
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Dong J, Hu J, Chi Y, Lin Z, Zou B, Yang S, Hill CL, Hu C. A Polyoxoniobate-Polyoxovanadate Double-Anion Catalyst for Simultaneous Oxidative and Hydrolytic Decontamination of Chemical Warfare Agent Simulants. Angew Chem Int Ed Engl 2017; 56:4473-4477. [PMID: 28322483 DOI: 10.1002/anie.201700159] [Citation(s) in RCA: 145] [Impact Index Per Article: 20.7] [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: 01/06/2017] [Indexed: 11/07/2022]
Abstract
A novel double-anion complex, H13 [(CH3 )4 N]12 [PNb12 O40 (VV O)2 ⋅(VIV4 O12 )2 ]⋅22 H2 O (1), based on bicapped polyoxoniobate and tetranuclear polyoxovanadate was synthesized, characterized by routine techniques and used in the catalytic decontamination of chemical warfare agents. Under mild conditions, 1 catalyzes both hydrolysis of the nerve agent simulant, diethyl cyanophosphonate (DECP) and selective oxidation of the sulfur mustard simulant, 2-chloroethyl ethyl sulfide (CEES). In the oxidative decontamination system 100 % CEES was transformed selectively to nontoxic 2-chloroethyl ethyl sulfoxide and vinyl ethyl sulfoxide using nearly stoichiometric 3 % aqueous H2 O2 with a turnover frequency (TOF) of 16 000 h-1 . Importantly, the catalytic activity is maintained even after ten recycles and CEES is completely decontaminated in 3 mins without formation of the highly toxic sulfone by-product. A three-step oxidative mechanism is proposed.
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Affiliation(s)
- Jing Dong
- Department of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P.R. China
| | - Jufang Hu
- Department of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P.R. China
| | - Yingnan Chi
- Department of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P.R. China
| | - Zhengguo Lin
- Department of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P.R. China
| | - Bo Zou
- Department of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P.R. China
| | - Song Yang
- Department of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P.R. China
| | - Craig L Hill
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, GA, 30322, USA
| | - Changwen Hu
- Department of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, 100081, P.R. China
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35
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Li D, Liu Z, Song J, Li H, Zhang B, Yin P, Zheng ZN, Roberts JE, Tsige M, Hill CL, Liu T. Cation Translocation around Single Polyoxometalate-Organic Hybrid Cluster Regulated by Electrostatic and Cation-π Interactions. Angew Chem Int Ed Engl 2017; 56:3294-3298. [DOI: 10.1002/anie.201612008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Dong Li
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
| | - Zhuonan Liu
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
| | - Jie Song
- Department of Chemistry; Emory University; Atlanta GA 30322 USA
| | - Hui Li
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
| | - Baofang Zhang
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
| | - Panchao Yin
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
| | | | - James E. Roberts
- Department of Chemistry; Lehigh University; Bethlehem PA 18015 USA
| | - Mesfin Tsige
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
| | - Craig L. Hill
- Department of Chemistry; Emory University; Atlanta GA 30322 USA
| | - Tianbo Liu
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
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36
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Li D, Liu Z, Song J, Li H, Zhang B, Yin P, Zheng ZN, Roberts JE, Tsige M, Hill CL, Liu T. Cation Translocation around Single Polyoxometalate-Organic Hybrid Cluster Regulated by Electrostatic and Cation-π Interactions. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201612008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Dong Li
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
| | - Zhuonan Liu
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
| | - Jie Song
- Department of Chemistry; Emory University; Atlanta GA 30322 USA
| | - Hui Li
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
| | - Baofang Zhang
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
| | - Panchao Yin
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
| | | | - James E. Roberts
- Department of Chemistry; Lehigh University; Bethlehem PA 18015 USA
| | - Mesfin Tsige
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
| | - Craig L. Hill
- Department of Chemistry; Emory University; Atlanta GA 30322 USA
| | - Tianbo Liu
- Department of Polymer Science; The University of Akron; Akron OH 44325 USA
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37
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Plonka AM, Wang Q, Gordon WO, Balboa A, Troya D, Guo W, Sharp CH, Senanayake SD, Morris JR, Hill CL, Frenkel AI. In Situ Probes of Capture and Decomposition of Chemical Warfare Agent Simulants by Zr-Based Metal Organic Frameworks. J Am Chem Soc 2017; 139:599-602. [DOI: 10.1021/jacs.6b11373] [Citation(s) in RCA: 141] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- Anna M. Plonka
- Department
of Material Science and Chemical Engineering, Stony Brook University, Stony
Brook, New York 11794, United States
| | - Qi Wang
- Department
of Material Science and Chemical Engineering, Stony Brook University, Stony
Brook, New York 11794, United States
| | - Wesley O. Gordon
- U.S. Army Edgewood
Chemical Biological Center APG, Aberdeen Proving
Ground, Maryland 21010, United States
| | - Alex Balboa
- U.S. Army Edgewood
Chemical Biological Center APG, Aberdeen Proving
Ground, Maryland 21010, United States
| | - Diego Troya
- Department
of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Weiwei Guo
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Conor H. Sharp
- Department
of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Sanjaya D. Senanayake
- Department
of Chemistry, Brookhaven National Laboratory, Upton, New York 11973, United States
| | - John R. Morris
- Department
of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Craig L. Hill
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Anatoly I. Frenkel
- Department
of Material Science and Chemical Engineering, Stony Brook University, Stony
Brook, New York 11794, United States
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38
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Wieliczko M, Geletii YV, Bacsa J, Musaev DG, Hill CL. Effects of Competitive Active-Site Ligand Binding on Proton- and Electron-Transfer Properties of the [Co4(H2O)2(PW9O34)2]10− Polyoxometalate Water Oxidation Catalyst. J CLUST SCI 2017. [DOI: 10.1007/s10876-016-1135-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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39
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Sullivan KP, Neiwert WA, Zeng H, Mehta AK, Yin Q, Hillesheim DA, Vivek S, Yin P, Collins-Wildman DL, Weeks ER, Liu T, Hill CL. Polyoxometalate-based gelating networks for entrapment and catalytic decontamination. Chem Commun (Camb) 2017; 53:11480-11483. [DOI: 10.1039/c7cc05657e] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [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
A polyoxometalate-based polymer with multifunctional capabilities including rapid gelation and catalytic decontamination of toxic or odorous compounds is realized.
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Affiliation(s)
| | | | - Huadong Zeng
- Department of Chemistry
- Emory University
- Atlanta
- USA
| | | | - Qiushi Yin
- Department of Chemistry
- Emory University
- Atlanta
- USA
| | | | | | - Panchao Yin
- Department of Polymer Science
- University of Akron
- Akron
- USA
| | | | | | - Tianbo Liu
- Department of Polymer Science
- University of Akron
- Akron
- USA
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Abstract
Two novel polyoxovanadate (POV)-containing fluorosurfactants, each with two hydrophobic fluorinated "tails" and one nanosized, hydrophilic, rigid POV "head group", are synthesized for the first time. They self-assemble into spherical, bilayer vesicles in acetonitrile/water mixed solvents, as evidenced by systemic studies using laser light scattering (LLS) and electron microscopy techniques. The vesicle sizes demonstrate dynamic change over different solvent compositions mainly as a result of the solvent swelling of the fluorocarbon chains, although the charge number on the POVs changes over the solvent polarity as well.
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Affiliation(s)
- Baofang Zhang
- Department of Polymer Science, The University of Akron , Akron, Ohio 44325, United States
| | - Jie Song
- Department of Chemistry, Emory University , Atlanta, Georgia 30322, United States
| | - Dong Li
- Department of Polymer Science, The University of Akron , Akron, Ohio 44325, United States
| | - Lang Hu
- Department of Polymer Science, The University of Akron , Akron, Ohio 44325, United States
| | - Craig L Hill
- Department of Chemistry, Emory University , Atlanta, Georgia 30322, United States
| | - Tianbo Liu
- Department of Polymer Science, The University of Akron , Akron, Ohio 44325, United States
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41
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Liu B, Wang RP, Glass EN, Hill CL, Cuk T, Okamoto J, Huang DJ, van Schooneveld MM, de Groot FMF. Distorted Tetrahedral CoII in K5H[CoW12O40]·xH2O Probed by 2p3d Resonant Inelastic X-ray Scattering. Inorg Chem 2016; 55:10152-10160. [DOI: 10.1021/acs.inorgchem.6b01228] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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)
- Boyang Liu
- Inorganic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Ru-Pan Wang
- Inorganic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Elliot N. Glass
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Craig L. Hill
- Department
of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Tanja Cuk
- Department of Chemistry, University of California—Berkeley, 419 Latimer Hall, Berkeley, California 94720, United States
| | - Jun Okamoto
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
| | - Di-Jing Huang
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
| | - Matti M. van Schooneveld
- Inorganic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
| | - Frank M. F. de Groot
- Inorganic Chemistry & Catalysis, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, 3584 CG Utrecht, The Netherlands
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42
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Huffman JH, Sidwell RW, Barnard DL, Morrison A, Otto MJ, Hill CL, Schinazi RF. Influenza Virus-Inhibitory Effects of a Series of Germanium- and Silicon-Centred Polyoxometalates. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/095632029700800201] [Citation(s) in RCA: 20] [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: 11/17/2022]
Abstract
A series of germanium- or silicon-centred heteropolytungstates (polyoxometalates) with the Barrel, Keggin or double Keggin structure were evaluated in vitro for their effects against influenza A (IV-A) and B (IV-B) viruses. Their 50% effective concentrations (EC50) against recent isolates of IV-A (H1N1) and IV-B ranged from 0.1 to 7.8 μM against IV-A (H3N2), the EC50 concentrations were often 10-fold higher. Recent clinical isolates of IV-A were generally more susceptible to these antiviral effects than older, laboratory-adapted strains. These experiments used inhibition of viral CPE in MDCK cells as determined microscopically and by Neutral Red (NR) uptake. Virus yield reduction studies indicated the 90% effective concentrations (EC90) ranged from 0.2 to 32 μM against these viruses. Cytotoxic or cell inhibitory concentrations (CC50), determined by NR uptake and total cell count, ranged from 38 to 189 μM, indicating high selective indices for some of these compounds. Altering time of addition of an active compound relative to infecting cells with IV-A (HINl) showed greatest efficacy when given early in viral replication. Five of the most active polyoxometalates were evaluated against IV-B infections in mice using intraperitoneal treatment beginning 4 h prior to virus exposure. Two of the compounds, one with the Barrel structure and the other with a double Keggin structure, were particularly inhibitory, preventing deaths, reducing arterial oxygen decline and lowering lung consolidation. Lung virus titres were reduced by a maximum of 0.7 log10. Therapy initiated 8 h post-virus exposure was not effective against this in vivo infection.
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Affiliation(s)
- JH Huffman
- Institute for Antiviral Research, Utah State University, Logan, UT 84322-5600, USA
| | - RW Sidwell
- Institute for Antiviral Research, Utah State University, Logan, UT 84322-5600, USA
| | - DL Barnard
- Institute for Antiviral Research, Utah State University, Logan, UT 84322-5600, USA
| | - A Morrison
- Institute for Antiviral Research, Utah State University, Logan, UT 84322-5600, USA
| | - MJ Otto
- Avid Therapeutics, Inc., Philadelphia, PA 19104, USA
| | - CL Hill
- Department of Chemistry, Emory University, Atlanta, GA 30322, USA
| | - RF Schinazi
- Veterans Affairs Medical Center and Department of Pediatrics, Emory University, Decatur, GA 30033, USA
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43
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Lv H, Gao Y, Guo W, Lauinger SM, Chi Y, Bacsa J, Sullivan KP, Wieliczko M, Musaev DG, Hill CL. Cu-based Polyoxometalate Catalyst for Efficient Catalytic Hydrogen Evolution. Inorg Chem 2016; 55:6750-8. [DOI: 10.1021/acs.inorgchem.6b01032] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
| | - Yuanzhe Gao
- College of Chemistry and Material Science, Hebei Normal University, No. 20 Road East of Second Ring South, Yuhua District, Shijiazhuang, Hebei 050024, P. R. China
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44
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Chen JS, Hill CL, Lester S, Ruediger CD, Battersby R, Jones G, Cleland LG, March LM. Supplementation with omega-3 fish oil has no effect on bone mineral density in adults with knee osteoarthritis: a 2-year randomized controlled trial. Osteoporos Int 2016; 27:1897-905. [PMID: 26694596 DOI: 10.1007/s00198-015-3438-x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2015] [Accepted: 11/19/2015] [Indexed: 10/22/2022]
Abstract
UNLABELLED This study aimed to determine the effect of fish oil on bone mineral density (BMD). There were no differences in the 2-year BMD measures between high and low dose groups after adjusting for baseline BMD. This randomized controlled trial did not demonstrate any efficacy of omega-3 fatty acids on bone loss in adults. INTRODUCTION The purpose of this study is to investigate whether supplementation with high dose omega-3 fish oil could have an impact on BMD. METHODS In a multicentre, double-blind randomized controlled trial (RCT) (ACTRN 12607000415404), 202 Australian participants aged ≥40 with knee osteoarthritis (mean age, 61.0 ± 10.0 years; 49 % female) were randomized to receive either high dose (4.5 g eicosapentaenoic acid and docosahexaenoic acid daily) or low dose (0.45 g/day) omega-3 fish oil for 2 years. BMD was assessed at baseline and 2 years by dual energy X-ray absorptiometry. RESULTS In subjects with baseline and 2-year assessments, mean standardized BMD at baseline for low or high dose group was 1198 ± 198 and 1157 ± 169 mg/cm(2), respectively, for the lumbar spine and was 1035 ± 165 and 1017 ± 174 mg/cm(2), respectively, for the femoral neck. There were no differences in the 2-year BMD measures between high and low dose groups after adjusting for baseline BMD in the complete case regression analyses (lumbar spine 3.7, 95 % confidence interval (CI) -7.9 to 15.3 mg/cm(2) and femoral neck -5.5, 95 % CI -14.9 to 3.9 mg/cm(2)). The findings did not change with additional adjustments of age, gender, study centre and uses of bone-related drugs during the study period as well as using the intention-to-treat analysis or limiting to older participants (≥55 years at the baseline) (all P ≥ 0.25). Mild adverse events such as headache and gastrointestinal intolerance were common but did not occur more frequently in either group. There were no serious adverse events related to the intervention. CONCLUSION A 2-year supplementation with high-dose omega-3 fish oil did not alter bone loss among men and women with knee osteoarthritis.
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Affiliation(s)
- J S Chen
- The University of Sydney Institute of Bone and Joint Research, Department of Rheumatology, Royal North Shore Hospital, St Leonards, Sydney, NSW, 2065, Australia
| | - C L Hill
- Discipline of Medicine, The University of Adelaide, Adelaide, Australia.
| | - S Lester
- Rheum Unit, The Queen Elizabeth Hospital, Woodville, Australia
| | - C D Ruediger
- Discipline of Medicine, The University of Adelaide, Adelaide, Australia
| | - R Battersby
- Discipline of Surgery, The University of Adelaide, Adelaide, Australia
| | - G Jones
- Menzies Research Institute, Hobart, Australia
| | - L G Cleland
- Royal Adelaide Hospital, Adelaide, Australia
| | - L M March
- The University of Sydney Institute of Bone and Joint Research, Department of Rheumatology, Royal North Shore Hospital, St Leonards, Sydney, NSW, 2065, Australia
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45
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Glass EN, Fielden J, Huang Z, Xiang X, Musaev DG, Lian T, Hill CL. Transition Metal Substitution Effects on Metal-to-Polyoxometalate Charge Transfer. Inorg Chem 2016; 55:4308-19. [PMID: 27082443 DOI: 10.1021/acs.inorgchem.6b00060] [Citation(s) in RCA: 20] [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
A series of hetero-bimetallic transition metal-substituted polyoxometalates (TMSPs) were synthesized based on the Co(II)-centered ligand [Co(II)W11O39](10-). The eight complex series, [Co(II)(M(x)OHy)W11O39]((12-x-y)-) (M(x)OHy = V(IV)O, Cr(III)(OH2), Mn(II)(OH2), Fe(III)(OH2), Co(II)(OH2), Ni(II)(OH2), Cu(II)(OH2), Zn(II)(OH2)), of which six are reported for the first time, was synthesized starting from [Co(III)W11O39](9-) and studied using spectroscopic, electrochemical, and computational techniques to evaluate the influence of substituted transition metals on the photodynamics of the metal-to-polyoxometalate charge transfer (MPCT) transition. The bimetallic complexes all show higher visible light absorption than the plenary [Co(II)W12O40](6-) and demonstrate the same MPCT transition as the plenary complex, but they have shorter excited-state lifetimes (sub-300 ps in aqueous media). The decreased lifetimes are rationalized on the basis of nonradiative relaxation due to coordinating aqua ligands, increased interaction with cations due to increased negative charge, and the energy gap law, with the strongest single factor appearing to be the charge on the anion. The most promising results are from the Cr- and Fe-substituted systems, which retain excited-state lifetimes at least 50% of that of [Co(II)W12O40](6-) while more than tripling the absorbance at 400 nm.
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Affiliation(s)
- Elliot N Glass
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University , Atlanta, Georgia 30322, United States
| | - John Fielden
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University , Atlanta, Georgia 30322, United States.,WestCHEM, School of Chemistry, University of Glasgow , Glasgow G12 8QQ, United Kingdom.,School of Chemistry, University of East Anglia , Norwich NR4 7TJ, United Kingdom
| | - Zhuangqun Huang
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University , Atlanta, Georgia 30322, United States
| | - Xu Xiang
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University , Atlanta, Georgia 30322, United States.,State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology , Beijing 100029, P. R. China
| | - Djamaladdin G Musaev
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University , Atlanta, Georgia 30322, United States
| | - Tianquan Lian
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University , Atlanta, Georgia 30322, United States
| | - Craig L Hill
- Department of Chemistry and Cherry L. Emerson Center for Scientific Computation, Emory University , Atlanta, Georgia 30322, United States
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46
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Guo W, Lv H, Sullivan KP, Gordon WO, Balboa A, Wagner GW, Musaev DG, Bacsa J, Hill CL. Broad-Spectrum Liquid- and Gas-Phase Decontamination of Chemical Warfare Agents by One-Dimensional Heteropolyniobates. Angew Chem Int Ed Engl 2016; 55:7403-7. [DOI: 10.1002/anie.201601620] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Revised: 03/17/2016] [Indexed: 11/07/2022]
Affiliation(s)
- Weiwei Guo
- Department of Chemistry; Cherry L. Emerson Center for Scientific Computation; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
- X-ray Crystallography Center; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
| | | | - Kevin P. Sullivan
- Department of Chemistry; Cherry L. Emerson Center for Scientific Computation; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
- X-ray Crystallography Center; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
| | - Wesley O. Gordon
- U.S. Army Edgewood Chemical Biological Center, APG, MD; 21010-5424 USA
| | - Alex Balboa
- U.S. Army Edgewood Chemical Biological Center, APG, MD; 21010-5424 USA
| | - George W. Wagner
- U.S. Army Edgewood Chemical Biological Center, APG, MD; 21010-5424 USA
| | - Djamaladdin G. Musaev
- Department of Chemistry; Cherry L. Emerson Center for Scientific Computation; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
| | - John Bacsa
- X-ray Crystallography Center; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
| | - Craig L. Hill
- Department of Chemistry; Cherry L. Emerson Center for Scientific Computation; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
- X-ray Crystallography Center; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
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47
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Guo W, Lv H, Sullivan KP, Gordon WO, Balboa A, Wagner GW, Musaev DG, Bacsa J, Hill CL. Broad-Spectrum Liquid- and Gas-Phase Decontamination of Chemical Warfare Agents by One-Dimensional Heteropolyniobates. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201601620] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Weiwei Guo
- Department of Chemistry; Cherry L. Emerson Center for Scientific Computation; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
- X-ray Crystallography Center; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
| | | | - Kevin P. Sullivan
- Department of Chemistry; Cherry L. Emerson Center for Scientific Computation; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
- X-ray Crystallography Center; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
| | - Wesley O. Gordon
- U.S. Army Edgewood Chemical Biological Center, APG, MD; 21010-5424 USA
| | - Alex Balboa
- U.S. Army Edgewood Chemical Biological Center, APG, MD; 21010-5424 USA
| | - George W. Wagner
- U.S. Army Edgewood Chemical Biological Center, APG, MD; 21010-5424 USA
| | - Djamaladdin G. Musaev
- Department of Chemistry; Cherry L. Emerson Center for Scientific Computation; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
| | - John Bacsa
- X-ray Crystallography Center; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
| | - Craig L. Hill
- Department of Chemistry; Cherry L. Emerson Center for Scientific Computation; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
- X-ray Crystallography Center; Emory University; 1515 Dickey Dr. Atlanta Georgia 30322 USA
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48
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Liu Y, Zhao SF, Guo SX, Bond AM, Zhang J, Zhu G, Hill CL, Geletii YV. Electrooxidation of Ethanol and Methanol Using the Molecular Catalyst [{Ru4O4(OH)2(H2O)4}(γ-SiW10O36)2]10–. J Am Chem Soc 2016; 138:2617-28. [DOI: 10.1021/jacs.5b11408] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [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)
- YuPing Liu
- School of Chemistry and ARC
Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Shu-Feng Zhao
- School of Chemistry and ARC
Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Si-Xuan Guo
- School of Chemistry and ARC
Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Alan M. Bond
- School of Chemistry and ARC
Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Jie Zhang
- School of Chemistry and ARC
Centre of Excellence for Electromaterials Science, Monash University, Clayton, Victoria 3800, Australia
| | - Guibo Zhu
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Craig L. Hill
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
| | - Yurii V. Geletii
- Department of Chemistry, Emory University, 1515 Dickey Drive, Atlanta, Georgia 30322, United States
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Affiliation(s)
- Mooeung Kim
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Ira A. Weinstock
- Department of Chemistry, Ben Gurion University of the Negev and the Ilse Katz Institute for Nanoscale Science and Technology, Beer Sheva 84105, Israel
| | - Yurii V. Geletii
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
| | - Craig L. Hill
- Department of Chemistry, Emory University, Atlanta, Georgia 30322, United States
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50
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Guo W, Bacsa J, van Leusen J, Sullivan KP, Lv H, Kögerler P, Hill CL. A Layered Manganese(IV)-Containing Heteropolyvanadate with a 1:14 Stoichiometry. Inorg Chem 2015; 54:10604-9. [PMID: 26496425 DOI: 10.1021/acs.inorgchem.5b01387] [Citation(s) in RCA: 12] [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: 11/29/2022]
Abstract
A novel manganese(IV)-containing symmetrical heteropolyvanadate was prepared by the transformation of K7[MnV13O38]·18H2O (K7MnV13) to K4Li2[MnV14O40]·21H2O (1) at pH 4. The heteropolyanion [MnV14O40](6-) (MnV14) is composed of a MnO6 octahedron surrounded by 14 edge-sharing VO6 octahedra. The simplified representation of MnV14 has a new topology termed jba1 with a total point symbol of {3(10)}2{3(14).4(7)}4{3(18).4(10)}8{3(44).4(46).5}. In the crystal lattice of 1, MnV14 packs with potassium ions, forming a 2D layered K2[MnV14O40](4-) network (ABABAB...). Four K(+) ions cap the four square O4 faces of MnV14, apparently stabilizing the heteropolyanion. Compound 1 catalyzes the t-BuOOH-based oxidation of 2-chloroethyl ethyl sulfide (a mustard gas simulant). The magnetic and catalytic properties of 1 are discussed.
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Affiliation(s)
| | | | - Jan van Leusen
- Institut für Anorganische Chemie, RWTH Aachen University , D-52074, Aachen, Germany
| | | | | | - Paul Kögerler
- Institut für Anorganische Chemie, RWTH Aachen University , D-52074, Aachen, Germany
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