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Petrehele AIG, Duteanu N, Morgovan MC, Filip SM, Ciocan S, Marian E. Synthesis and Characterisation of Monolacunary Keggin Monovanado-deca-tungstophosphate and Its Complexes with Transition Metal Cations. MATERIALS (BASEL, SWITZERLAND) 2023; 16:827. [PMID: 36676564 PMCID: PMC9866822 DOI: 10.3390/ma16020827] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/26/2022] [Accepted: 01/05/2023] [Indexed: 06/17/2023]
Abstract
Five new complexes with metal cations (Mn2+, Fe3+, Co2+, Ni2+, and Cu2+) of monolacunary Keggin monovanado-deca-tungstophosphate, K8[PVW10O39]·15H2O, have been synthesised. The molar ratio of the combination between metal cations and K8[PVW10O39]·15H2O has been established to be 1:1, and its general molecular formulas were found to be: Kn[MPVW10O39(H2O)]·xH2O (n = 5 for M = Fe3+ and n = 6 for M = Mn2+, Co2+, Ni2+, and Cu2+). Optimal conditions for complexes' synthesis (pH, temperature, and reaction time) have been determined. The characterisation of K8[PVW10O39]·15H2O and of its compounds Kn[MPVW10O39(H2O)]·xH2O have been performed using AAS, TG-DTA-DTG, UV-VIS, IR, Raman, and powder XRD methods. In UV spectra, two maximums of absorption were obtained, at 200 and 250 nm, characteristic of Keggin polycondensate compounds. The coordination of cations Ni2+, Co2+, and Cu2+ through oxygen atoms from K8[PVW10O39]·15H2O in an octahedron system has been reflected with VIS spectroscopy. All these methods have proved the compositions and structures of K8[PVW10O39]·15H2O and Kn[MPVW10O39(H2O)]·xH2O, their similarity with other vanadotungstophosphates, and their achievements in the Keggin class. Additionally, all analysis methods have shown an increase in the degree of structural symmetry and the thermal stability of a polyoxoanion complex after attaching metal cations compared to the monolacunary, K8[PVW10O39]·15H2O.
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Affiliation(s)
- Anda Ioana Gratiela Petrehele
- Department of Chemistry, Faculty of Informatics and Sciences, University of Oradea, 1 University Street, 410087 Oradea, Romania
| | - Narcis Duteanu
- Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University of Timisoara, 2 Victoriei Square, 300006 Timisoara, Romania
| | - Mona Claudia Morgovan
- Department of Chemistry, Faculty of Informatics and Sciences, University of Oradea, 1 University Street, 410087 Oradea, Romania
| | - Sanda Monica Filip
- Department of Physics, Faculty of Informatics and Sciences, University of Oradea, 1 University Street, 410087 Oradea, Romania
| | - Stefania Ciocan
- Faculty of Industrial Chemistry and Environmental Engineering, Politehnica University of Timisoara, 2 Victoriei Square, 300006 Timisoara, Romania
| | - Eleonora Marian
- Department of Pharmacy, Faculty of Medicine and Pharmacy, University of Oradea, 29 Jiga Street, 410028 Oradea, Romania
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2
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Curnow OJ, Senthooran R. Ionic Liquid Keggin Polyoxometallates with the Tris(dihexylamino)cyclopropenium Cation. Polyhedron 2023. [DOI: 10.1016/j.poly.2023.116318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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3
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Korenev VS, Abramov PA, Sokolov MN. Azide Coordination to Polyoxometalates: Synthesis of (Bu4N)4.3K0.7[PW11O39FeIIIN3]⋅2.5H2O. RUSS J INORG CHEM+ 2022. [DOI: 10.1134/s0036023622600897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Pascoite Minerals and Potential Application of NMR Spectroscopy. MINERALS 2022. [DOI: 10.3390/min12080980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/10/2022]
Abstract
The 20 minerals encompassing the pascoite family of decavanadate isopolyanion-containing [V10O28]6− minerals include a few minerals, such as rakovanite, that have been described as containing a protonated decavanadate anion. Rakovanite was originally assigned the formula Na3[H3V10O28]•15H2O and now is redefined with an ideal formula (NH4)3Na3[V10O28]•12H2O. Nuclear magnetic resonance (NMR) and particularly 51V NMR spectroscopy is an informative method used to describe the protonation state and speciation in both solid and solution states of materials in the chemical and life sciences. However, 51V NMR spectroscopy has not yet been used experimentally to distinguish the protonation state of the decavanadate ion of leaching solutions and thus contributing to the discussion regarding the controversial protonation states of decavanadate ions in gunterite, rakovanite, and nashite. In contrast, the morphology and crystal structure for apatites, vanadinite, pyromorphite, and mimetite was related to 207Pb NMR chemical shifts, assisting in describing the local environments of these minerals. NMR spectroscopy could be a useful method if used in the future for decavanadate-containing minerals. Currently, partial reduction of two Pascoite minerals (caseyite and nashite) is proposed and accordingly could now effectively be investigated using a different magnetic resonance technique, EPR spectroscopy.
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Zhou W, Ogiwara N, Weng Z, Zhao C, Yan L, Kikukawa Y, Uchida S. Vanadium-substituted polycationic Al-oxo cluster in a porous ionic crystal exhibiting Lewis acidity. Chem Commun (Camb) 2022; 58:12548-12551. [DOI: 10.1039/d2cc03545f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A vanadium-substituted polycationic Al-oxo cluster (Al28V4) in an all-inorganic porous ionic crystal exhibits Lewis acidity.
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Affiliation(s)
- Wei Zhou
- Department of Basic Science, School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Naoki Ogiwara
- Department of Basic Science, School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Zhewei Weng
- Department of Basic Science, School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
| | - Congcong Zhao
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Likai Yan
- Institute of Functional Material Chemistry, Faculty of Chemistry, Northeast Normal University, Changchun 130024, P. R. China
| | - Yuji Kikukawa
- Department of Chemistry, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan
| | - Sayaka Uchida
- Department of Basic Science, School of Arts and Sciences, The University of Tokyo, Komaba, Meguro-ku, Tokyo 153-8902, Japan
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6
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Divanadium substituted keggin [PV2W10O40] on non-reducible supports-Al2O3 and SiO2: synthesis, characterization, and catalytic properties for oxidative dehydrogenation of propane. REACTION KINETICS MECHANISMS AND CATALYSIS 2020. [DOI: 10.1007/s11144-020-01893-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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7
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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] [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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Frenzel RA, Romanelli GP, Pizzio LR. Novel catalyst based on mono- and di-vanadium substituted Keggin polyoxometalate incorporated in poly(acrylic acid-co-acrylamide) polymer for the oxidation of sulfides. MOLECULAR CATALYSIS 2018. [DOI: 10.1016/j.mcat.2018.07.016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Gupta R, Huang W, Francesconi LC, Polenova T. Effect of positional isomerism and vanadium substitution on 51V magic angle spinning NMR Spectra Of Wells-Dawson polyoxotungstates. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2017; 84:28-33. [PMID: 27998683 PMCID: PMC5466850 DOI: 10.1016/j.ssnmr.2016.12.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2016] [Revised: 12/02/2016] [Accepted: 12/04/2016] [Indexed: 06/06/2023]
Abstract
We examined the positional isomerism and vanadium substitution on the 51V magic angle spinning NMR spectra of potassium salts of vanadium-substituted polyoxotungstates of the Wells-Dawson series. NMR parameters of this class of catalytically active polyoxotungstates effect of are reported. Multiple species, indicative of differences in the local environment at the substitution sites, are observed in solid-state NMR spectra of the di- and tri- substituted complexes in contrast to solution NMR spectra, where single average chemical shift was observed. The quadrupolar and chemical shift anisotropy parameters depend strongly on the position and the degree of the vanadium substitution into the oxoanion core establishing 51V SATRAS NMR spectroscopy as a sensitive probe of the local electronic environment in these catalytically active solids.
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Affiliation(s)
- Rupal Gupta
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Wenlin Huang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Lynn C Francesconi
- Department of Chemistry, City University of New York, Hunter College, 695 Park Avenue, New York 10021, USA; Ph.D. Program in Chemistry, The Graduate Center of the City University of New York, New York 10016, USA.
| | - Tatyana Polenova
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA.
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10
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Pinheiro PS, Rocha AB, Eon JG, Bonfim RDPF, Sanches SG. Isomer distribution in α-Keggin structures [XW12−V O40]−(+) X = Si, P (0 ≤ n ≤ 4): A DFT study of free energy and vibrational spectra. CR CHIM 2016. [DOI: 10.1016/j.crci.2016.05.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Iijima T, Yamase T, Nishimura K. Molecular and electron-spin structures of a ring-shaped mixed-valence polyoxovanadate (IV, V) studied by (11)B and (23)Na solid-state NMR spectroscopy and DFT calculations. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2016; 76-77:15-23. [PMID: 27018827 DOI: 10.1016/j.ssnmr.2016.03.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Revised: 03/10/2016] [Accepted: 03/11/2016] [Indexed: 06/05/2023]
Abstract
(11)B and (23)Na solid-state nuclear magnetic resonance (NMR) spectra of ring-shaped paramagnetic crystals of H15[V7(IV)V5(V)B32O84Na4]·13H2O containing seven d(1) electrons from V(IV) were studied. Magic-angle-spinning (MAS) and multiple-quantum MAS NMR experiments were performed at moderate (9.4T) and ultrahigh magnetic fields (21.6T). The NMR parameters for quadrupole and isotropic chemical shift interactions were estimated by simulation of the NMR spectra and from relativistic density functional theory (DFT) calculations. Four Na ions incorporated into the framework were found to occupy four distinct sites with different populations. The DFT calculation showed that d(1) electrons with effectively one up-spin caused by strong antiferromagnetic interactions were delocalized over the 12V ions.
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Affiliation(s)
- Takahiro Iijima
- Institute of Arts and Sciences, Yamagata University, Yamagata 990-8560, Japan.
| | - Toshihiro Yamase
- Tokyo Institute of Technology, Nagatsuta, Yokohama 226-8503, Japan; MO Device Corporation, Kanazawa 920-0335, Japan
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12
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Gupta R, Yehl J, Li M, Polenova T. 51V magic angle spinning NMR spectroscopy and quantum chemical calculations in vanadium bio-inorganic systems: current perspective. CAN J CHEM 2015. [DOI: 10.1139/cjc-2014-0557] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In recent years, 51V magic angle spinning (MAS) NMR spectroscopy has been widely used to characterize vanadium centers in biology, biomimetic complexes, and inorganic compounds of medicinal and industrial relevance. It has been demonstrated that 51V NMR parameters are sensitive probes of the coordination geometry and chemical environment of the metal center, beyond the first coordination sphere. To establish the relationships between NMR parameters and structure of the vanadium centers, over the past decade a large series of coordination complexes have been analyzed by MAS NMR spectroscopy. It has been demonstrated that the interpretation of the NMR parameters requires the use of theoretical methods, such as density functional (DFT) theory, whereby the experimental NMR observables are linked to the electronic and structural properties of a molecule. DFT calculations have been successfully employed to not only predict NMR parameters but to also yield valuable information regarding the structure and function of various vanadium compounds. In this report, we review the current state of the field, and present a survey of bioinorganic vanadium complexes as well as vanadium-dependent haloperoxidases analyzed using 51V MAS NMR spectroscopy and DFT calculations, to illustrate the rich information content available from such a combined approach.
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Affiliation(s)
- Rupal Gupta
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Jenna Yehl
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Mingyue Li
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
| | - Tatyana Polenova
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA
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13
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Polenova T, Gupta R, Goldbourt A. Magic angle spinning NMR spectroscopy: a versatile technique for structural and dynamic analysis of solid-phase systems. Anal Chem 2015; 87:5458-69. [PMID: 25794311 PMCID: PMC4890703 DOI: 10.1021/ac504288u] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Magic Angle Spinning (MAS) NMR spectroscopy is a powerful method for analysis of a broad range of systems, including inorganic materials, pharmaceuticals, and biomacromolecules. The recent developments in MAS NMR instrumentation and methodologies opened new vistas to atomic-level characterization of a plethora of chemical environments previously inaccessible to analysis, with unprecedented sensitivity and resolution.
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Affiliation(s)
- Tatyana Polenova
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
| | - Rupal Gupta
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, United States
| | - Amir Goldbourt
- School of Chemistry, Tel Aviv University, Ramat Aviv 69978, Tel Aviv, Israel
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14
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Leclercq L, Mouret A, Renaudineau S, Schmitt V, Proust A, Nardello-Rataj V. Self-assembled polyoxometalates nanoparticles as pickering emulsion stabilizers. J Phys Chem B 2015; 119:6326-37. [PMID: 25937090 DOI: 10.1021/acs.jpcb.5b01805] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We easily produced a series of polyoxometalate (POM) nanoparticles by taking benefit from electrostatic attractions between various POMs and alkylammonium cations. These self-assembled supramolecular nanoparticles are fully characterized in terms of shape, nanostructure, and physicochemical properties. The nanoparticle differences are discussed on the basis of the chemical composition of the initial POM. Moreover, such particles have the ability to stabilize water-in-oil Pickering emulsions. Using a gel-trapping technique coupled to atomic force microscopy (AFM) observations, we determined their affinity toward oil by the contact angle of adsorbed nanoparticles. We show that the emulsion droplet size and stability can be directly linked to the nanoparticle hydrophobicity, which is tuned by the charge localization and molecular packing of POMs with the ammonium cations. Such particles are of special interest as they open large possibilities for Pickering interfacial catalysis.
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Affiliation(s)
- Loïc Leclercq
- †Université de Lille, Sciences et Technologies, UCCS UMR CNRS 8181, F-59655 Villeneuve d'Ascq Cedex, France
| | - Adrien Mouret
- †Université de Lille, Sciences et Technologies, UCCS UMR CNRS 8181, F-59655 Villeneuve d'Ascq Cedex, France
| | - Séverine Renaudineau
- ‡Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 8332, Institut Parisien de Chimie Moléculaire, F-75005 Paris, France
| | - Véronique Schmitt
- §Centre de Recherche Paul Pascal, Université de Bordeaux, UPR CNRS 8641, 115 Avenue du Dr. Albert Schweitzer, F-33600 Pessac, France
| | - Anna Proust
- ‡Sorbonne Universités, UPMC Univ Paris 06, UMR CNRS 8332, Institut Parisien de Chimie Moléculaire, F-75005 Paris, France
| | - Véronique Nardello-Rataj
- †Université de Lille, Sciences et Technologies, UCCS UMR CNRS 8181, F-59655 Villeneuve d'Ascq Cedex, France
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15
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Pourpoint F, Yehl J, Li M, Gupta R, Trébosc J, Lafon O, Amoureux JP, Polenova T. NMR Crystallography of an Oxovanadium(V) Complex by an Approach Combining Multinuclear Magic Angle Spinning NMR, DFT, and Spin Dynamics Simulations. Chemphyschem 2015; 16:1619-26. [DOI: 10.1002/cphc.201500033] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Indexed: 11/08/2022]
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16
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Li M, Yehl J, Hou G, Chatterjee PB, Goldbourt A, Crans DC, Polenova T. NMR Crystallography for Structural Characterization of Oxovanadium(V) Complexes: Deriving Coordination Geometry and Detecting Weakly Coordinated Ligands at Atomic Resolution in the Solid State. Inorg Chem 2015; 54:1363-74. [DOI: 10.1021/ic5022388] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mingyue Li
- Department
of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Jenna Yehl
- Department
of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Guangjin Hou
- Department
of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
| | - Pabitra B. Chatterjee
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Amir Goldbourt
- School
of Chemistry, Tel Aviv University, Ramat Aviv 69978, Tel Aviv, Israel
| | - Debbie C. Crans
- Department
of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, United States
| | - Tatyana Polenova
- Department
of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, United States
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17
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Klonowski P, Goloboy JC, Uribe-Romo FJ, Sun F, Zhu L, Gándara F, Wills C, Errington RJ, Yaghi OM, Klemperer WG. Synthesis and Characterization of the Platinum-Substituted Keggin Anion α-H2SiPtW11O404–. Inorg Chem 2014; 53:13239-46. [DOI: 10.1021/ic502617k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Peter Klonowski
- Department
of Chemistry, University of California, 419 Latimer Hall, Berkeley, California 94720, United States
- Materials
Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron
Road, Berkeley, California 94720, United States
| | - James C. Goloboy
- Department
of Chemistry, University of Illinois at Urbana−Champaign, 505 South Mathews Avenue, Urbana, Illinois 61801, United States
| | | | - Furong Sun
- Department
of Chemistry, University of Illinois at Urbana−Champaign, 505 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Lingyang Zhu
- Department
of Chemistry, University of Illinois at Urbana−Champaign, 505 South Mathews Avenue, Urbana, Illinois 61801, United States
| | - Felipe Gándara
- Department
of Chemistry, University of California, 419 Latimer Hall, Berkeley, California 94720, United States
- Materials
Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron
Road, Berkeley, California 94720, United States
| | - Corinne Wills
- School
of Chemistry, Newcastle University, Newcastle upon Tyne NE1
7RU, United Kingdom
| | - R. John Errington
- School
of Chemistry, Newcastle University, Newcastle upon Tyne NE1
7RU, United Kingdom
| | - Omar M. Yaghi
- Department
of Chemistry, University of California, 419 Latimer Hall, Berkeley, California 94720, United States
- Materials
Sciences Division, Lawrence Berkeley National Laboratory, 1 Cyclotron
Road, Berkeley, California 94720, United States
- Kavli Energy NanoSciences Institute, Berkeley, California 94720, United States
| | - Walter G. Klemperer
- Department
of Chemistry, University of Illinois at Urbana−Champaign, 505 South Mathews Avenue, Urbana, Illinois 61801, United States
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18
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Gam Derouich S, Rinfray C, Izzet G, Pinson J, Gallet JJ, Kanoufi F, Proust A, Combellas C. Control of the grafting of hybrid polyoxometalates on metal and carbon surfaces: toward submonolayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:2287-2296. [PMID: 24494799 DOI: 10.1021/la500067e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A Keggin-type POM is attached to gold or glassy carbon surfaces by electro(chemical) or peptidic coupling. In addition to demonstrating the robust attachment of the POMs (by electrochemistry, XPS, and IRRAS), the surface concentration, layer thickness, and rate constant for electron transfer from the surface to the POMs have been measured. The use of such complementary techniques is mandatory to characterize the modified electrodes properly. Whatever the grafting method, experimental conditions are found to allow monolayer or submonolayer coverage. Besides covalently grafted species, additional electrostatically bonded POMs are present in the film. Cathodic polarization allows removing them to get a grafted film that is stable with time and potential, which is a requirement in the design of molecular memories.
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Affiliation(s)
- Sarra Gam Derouich
- Physicochimie des Electrolytes, Colloides et Sciences Analytiques, UMR CNRS 7195 - ESPCI ParisTech, 10 rue Vauquelin, 75231 Paris Cedex 05, France
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19
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Fernandes DM, Barbosa ADS, Pires J, Balula SS, Cunha-Silva L, Freire C. Novel composite material polyoxovanadate@MIL-101(Cr): a highly efficient electrocatalyst for ascorbic acid oxidation. ACS APPLIED MATERIALS & INTERFACES 2013; 5:13382-13390. [PMID: 24308331 DOI: 10.1021/am4042564] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
A novel hybrid composite material, PMo10V2@MIL-101 was prepared by the encapsulation of the tetra-butylammonium (TBA) salt of the vanadium-substituted phosphomolybdate [PMo10V2O40](5-) (PMo10V2) into the porous metal-organic framework (MOF) MIL-101(Cr). The materials characterization by powder X-ray diffraction, Fourier transform infrared spectra and scanning electron microscopy confirmed the preparation of the composite material without disruption of the MOF porous structure. Pyrolytic graphite electrodes modified with the original components (MIL-101(Cr), PMo10V2), and the composite material PMo10V2@MIL-101 were prepared and their electrochemical responses were studied by cyclic voltammetry. Surface confined redox processes were observed for all the immobilized materials. MIL-101(Cr) showed one-electron reduction process due to chromium centers (Cr(III) → Cr(II)), while PMo10V2 presented five reduction processes: the peak at more positive potentials is attributed to two superimposed 1-electron vanadium reduction processes (V(V) → V(IV)) and the other four peaks to Mo-centred two-electron reduction processes (Mo(VI) → Mo(V)). The electrochemical behavior of the composite material PMo10V2@MIL-101 showed both MIL-101(Cr) and PMo10V2 redox features, although with the splitting of the two vanadium processes and the shift of the Mo- and Cr- centered processes to more negative potentials. Finally, PMo10V2@MIL-101 modified electrode showed outstanding enhanced vanadium-based electrocatalytic properties towards ascorbic acid oxidation, in comparison with the free PMo10V2, as a result of its immobilization into the porous structure of the MOF. Furthermore, PMo10V2@MIL-101 modified electrode showed successful simultaneous detection of ascorbic acid and dopamine.
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Affiliation(s)
- Diana M Fernandes
- REQUIMTE, Departamento de Química e Bioquímica, Faculdade de Ciências, Universidade do Porto , 4169-007 Porto, Portugal
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Rinfray C, Izzet G, Pinson J, Gam Derouich S, Ganem JJ, Combellas C, Kanoufi F, Proust A. Electrografting of Diazonium-Functionalized Polyoxometalates: Synthesis, Immobilisation and Electron-Transfer Characterisation from Glassy Carbon. Chemistry 2013; 19:13838-46. [DOI: 10.1002/chem.201302304] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Indexed: 12/21/2022]
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21
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Alimaje K, Wang X, Zhang ZY, Peng J, Shi ZY, Yu X, Ren ZX. Two Bisupporting Keggin-Type POM-Based Hybrids Decorated by [Zn(phen)2]2+ Fragments. J CLUST SCI 2013. [DOI: 10.1007/s10876-013-0594-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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22
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Dahms SO, Kuester M, Streb C, Roth C, Sträter N, Than ME. Localization and orientation of heavy-atom cluster compounds in protein crystals using molecular replacement. ACTA CRYSTALLOGRAPHICA. SECTION D, BIOLOGICAL CRYSTALLOGRAPHY 2013; 69:284-97. [PMID: 23385464 PMCID: PMC3565441 DOI: 10.1107/s0907444912046008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2012] [Accepted: 11/07/2012] [Indexed: 01/17/2023]
Abstract
Heavy-atom clusters (HA clusters) containing a large number of specifically arranged electron-dense scatterers are especially useful for experimental phase determination of large complex structures, weakly diffracting crystals or structures with large unit cells. Often, the determination of the exact orientation of the HA cluster and hence of the individual heavy-atom positions proves to be the critical step in successful phasing and subsequent structure solution. Here, it is demonstrated that molecular replacement (MR) with either anomalous or isomorphous differences is a useful strategy for the correct placement of HA cluster compounds. The polyoxometallate cluster hexasodium α-metatungstate (HMT) was applied in phasing the structure of death receptor 6. Even though the HA cluster is bound in alternate partially occupied orientations and is located at a special position, its correct localization and orientation could be determined at resolutions as low as 4.9 Å. The broad applicability of this approach was demonstrated for five different derivative crystals that included the compounds tantalum tetradecabromide and trisodium phosphotungstate in addition to HMT. The correct placement of the HA cluster depends on the length of the intramolecular vectors chosen for MR, such that both a larger cluster size and the optimal choice of the wavelength used for anomalous data collection strongly affect the outcome.
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Affiliation(s)
- Sven O. Dahms
- Protein Crystallography Group, Leibniz Institute for Age Research – Fritz Lipmann Institute (FLI), Beutenbergstrasse 11, D-07745 Jena, Germany
| | - Miriam Kuester
- Protein Crystallography Group, Leibniz Institute for Age Research – Fritz Lipmann Institute (FLI), Beutenbergstrasse 11, D-07745 Jena, Germany
| | - Carsten Streb
- Institute of Inorganic Chemistry II, Department of Chemistry and Pharmacy, Friedrich-Alexander-University Erlangen-Nürnberg, Egerlandstrasse 1, D-91058 Erlangen, Germany
| | - Christian Roth
- Institute of Bioanalytical Chemistry, Center for Biotechnology and Biomedicine, Universität Leipzig, D-04103 Leipzig, Germany
| | - Norbert Sträter
- Institute of Bioanalytical Chemistry, Center for Biotechnology and Biomedicine, Universität Leipzig, D-04103 Leipzig, Germany
| | - Manuel E. Than
- Protein Crystallography Group, Leibniz Institute for Age Research – Fritz Lipmann Institute (FLI), Beutenbergstrasse 11, D-07745 Jena, Germany
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Goncharova-Zapata O, Chatterjee PB, Hou G, Quinn LL, Li M, Yehl J, Crans DC, Polenova T. Effect of Ancillary Ligand on Electronic Structure as Probed by 51V Solid-State NMR Spectroscopy for Vanadium- o-Dioxolene Complexes. CrystEngComm 2013; 15. [PMID: 24353476 DOI: 10.1039/c3ce41322e] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
A series of vanadium(V) complexes with o-dioxolene (catecholato) ligands and an ancillary ligand, (N-(salicylideneaminato)ethylenediamine) (hensal), were investigated using 51V solid-state magic angle spinning NMR spectroscopy (51V MAS NMR) to assess the local environment of the vanadium(V). The solid-state 51V NMR parameters of vanadium(V) complexes with a related potentially tetradentate ancillary ligand (N-salicylidene-N'-(2-hydroxyethyl)ethylenediamine) (h2shed) were previously shown to be associated with the size of the HOMO-LUMO gap in the complex, and as such provide insights on the interaction between metal ion and ligand (P. B. Chatterjee, et al., Inorg. Chem 50 (2011) 9794). Our results show that the modification of the ancillary ligand does not impact the observed trend between complexes ranging from catechols with electron rich to electron poor substituents. However, the ancillary ligand does impact the size of the HOMO-LUMO separation in the parent complex and thus the solid-state vanadium NMR chemical shift of the unsubstituted vanadium complex. For these complexes significant changes observed in the isotropic shifts and more modest changes detected in the CQ reflect the electronic changes in the complex as the catechol is varied. However, no obvious trend was observed in the chemical shift anisotropies (δσ and ησ) with the variation in the catechol. The electronic changes in the coordination environment of the vanadium can be described using solid-state 51V NMR spectroscopy.
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Affiliation(s)
- Olga Goncharova-Zapata
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA. ; Tel. +1-302-831-1968
| | - Pabitra B Chatterjee
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523-1872, USA. Tel. +1-970-491-7635
| | - Guangjin Hou
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA. ; Tel. +1-302-831-1968
| | - Laurence L Quinn
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA. ; Tel. +1-302-831-1968
| | - Mingyue Li
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA. ; Tel. +1-302-831-1968
| | - Jenna Yehl
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA. ; Tel. +1-302-831-1968
| | - Debbie C Crans
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA. ; Tel. +1-302-831-1968
| | - Tatyana Polenova
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716, USA. ; Tel. +1-302-831-1968
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Chatterjee PB, Goncharov-Zapata O, Hou G, Dmitrenko O, Polenova T, Crans DC. Redox Activity in a Vanadium(V)-o-Dioxolene Complex Is Modulated by Protonation State As Indicated by51V Solid-State NMR Spectroscopy and Density Functional Theory. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200259] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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25
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Do Keggin anions repulse each other in solution? The effect of solvent, counterions and ion representation investigated by free energy (PMF) simulations. CR CHIM 2012. [DOI: 10.1016/j.crci.2011.07.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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26
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Lu X, Lafon O, Trébosc J, Amoureux JP. Detailed analysis of the S-RESPDOR solid-state NMR method for inter-nuclear distance measurement between spin-1/2 and quadrupolar nuclei. JOURNAL OF MAGNETIC RESONANCE (SAN DIEGO, CALIF. : 1997) 2012; 215:34-49. [PMID: 22257437 DOI: 10.1016/j.jmr.2011.12.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 12/07/2011] [Accepted: 12/12/2011] [Indexed: 05/31/2023]
Abstract
We present a detailed analysis of the Symmetry-based Resonance-Echo Saturation-Pulse DOuble-Resonance (S-RESPDOR) method in order to measure the inter-nuclear distances between spin-1/2 and quadrupolar nuclei. This recently introduced sequence employs a symmetry-based recoupling scheme on the observed spin-1/2 channel and a saturation pulse on the quadrupolar channel. This method requires a low radio-frequency (rf) field, is compatible with high MAS frequency and allows a rapid determination of inter-nuclear distances by fitting the experimental signal fraction to an analytical expression. Here, we analyze in detail the influence of the various experimental and spin-interaction parameters on the S-RESPDOR signal fraction and the measured distance. We show that the S-RESPDOR signal fraction only depends on the quadrupole interaction and the inter-nuclear distance. We demonstrate that the required rf-field on the quadrupolar channel is smaller than that required for an adiabatic-passage pulse in REAPDOR-type experiments. The only limitation of the method is the requirement of accurate rotor synchronization between the two parts of the dipolar recoupling sequences. Using S-RESPDOR, we have quantitatively measured a (31)P-(51)V distance of 357 pm in a mono-vanadium-substituted polyoxo-tungstate, K(4)PVW(11)O(40), from the Keggin family and a (13)C-(67)Zn distance of 286 pm in [80%-(67)Zn]zinc [1-(13)C]acetate. These results show that S-RESPDOR can be employed in the challenging cases of quadrupolar nuclei exhibiting a high spin number and either large chemical-shift anisotropy ((51)V) or low gyromagnetic ratio ((67)Zn).
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Affiliation(s)
- Xingyu Lu
- Unit of Catalysis and Chemistry of Solids, CNRS-8181, University Lille North of France, 59652 Villeneuve d'Ascq, France
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27
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Chatterjee PB, Goncharov-Zapata O, Quinn LL, Hou G, Hamaed H, Schurko RW, Polenova T, Crans DC. Characterization of noninnocent metal complexes using solid-state NMR spectroscopy: o-dioxolene vanadium complexes. Inorg Chem 2011; 50:9794-803. [PMID: 21842875 DOI: 10.1021/ic200046k] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
(51)V solid-state NMR (SSNMR) studies of a series of noninnocent vanadium(V) catechol complexes have been conducted to evaluate the possibility that (51)V NMR observables, quadrupolar and chemical shift anisotropies, and electronic structures of such compounds can be used to characterize these compounds. The vanadium(V) catechol complexes described in these studies have relatively small quadrupolar coupling constants, which cover a surprisingly small range from 3.4 to 4.2 MHz. On the other hand, isotropic (51)V NMR chemical shifts cover a wide range from -200 to 400 ppm in solution and from -219 to 530 ppm in the solid state. A linear correlation of (51)V NMR isotropic solution and solid-state chemical shifts of complexes containing noninnocent ligands is observed. These experimental results provide the information needed for the application of (51)V SSNMR spectroscopy in characterizing the electronic properties of a wide variety of vanadium-containing systems and, in particular, those containing noninnocent ligands and that have chemical shifts outside the populated range of -300 to -700 ppm. The studies presented in this report demonstrate that the small quadrupolar couplings covering a narrow range of values reflect the symmetric electronic charge distribution, which is also similar across these complexes. These quadrupolar interaction parameters alone are not sufficient to capture the rich electronic structure of these complexes. In contrast, the chemical shift anisotropy tensor elements accessible from (51)V SSNMR experiments are a highly sensitive probe of subtle differences in electronic distribution and orbital occupancy in these compounds. Quantum chemical (density functional theory) calculations of NMR parameters for [VO(hshed)(Cat)] yield a (51)V chemical shift anisotropy tensor in reasonable agreement with the experimental results, but surprisingly the calculated quadrupolar coupling constant is significantly greater than the experimental value. The studies demonstrate that substitution of the catechol ligand with electron-donating groups results in an increase in the HOMO-LUMO gap and can be directly followed by an upfield shift for the vanadium catechol complex. In contrast, substitution of the catechol ligand with electron-withdrawing groups results in a decrease in the HOMO-LUMO gap and can directly be followed by a downfield shift for the complex. The vanadium catechol complexes were used in this work because (51)V is a half-integer quadrupolar nucleus whose NMR observables are highly sensitive to the local environment. However, the results are general and could be extended to other redox-active complexes that exhibit coordination chemistry similar to that of the vanadium catechol complexes.
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Affiliation(s)
- Pabitra B Chatterjee
- Department of Chemistry, Colorado State University, Fort Collins, Colorado 80523-1872, USA
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28
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Gharnati L, Walter O, Arnold U, Döring M. Guanidinium-Based Phosphotungstates and Ionic Liquids as Catalysts and Solvents for the Epoxidation of Olefins with Hydrogen Peroxide. Eur J Inorg Chem 2011. [DOI: 10.1002/ejic.201100037] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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29
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Multinuclear nuclear magnetic resonance and density functional theoretical studies on the structure of bisperoxovanadium complexes with bidentate donors. Inorganica Chim Acta 2011. [DOI: 10.1016/j.ica.2010.08.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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30
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Zeng B, Bao J, Cai S, Fu R, Chen Z. The structure, stability, and reactivity of oxalato-monoperoxovanadium(V) in solution. J COORD CHEM 2010. [DOI: 10.1080/00958972.2010.510184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Birong Zeng
- a College of Materials, and Fujian Key Laboratory of Plasma and Magnetic Resonance, Xiamen University , Xiamen 361005, China
| | - Jianfeng Bao
- a College of Materials, and Fujian Key Laboratory of Plasma and Magnetic Resonance, Xiamen University , Xiamen 361005, China
| | - Shuhui Cai
- b Department of Physics, Fujian Key Laboratory of Plasma and Magnetic Resonance , State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University , Xiamen 361005, China
| | - Riqiang Fu
- c National High Magnetic Field Laboratory, Center for Interdisciplinary Magnetic Resonance, 1800 East Paul Dirac Drive , Tallahassee, FL 32310, USA
| | - Zhong Chen
- b Department of Physics, Fujian Key Laboratory of Plasma and Magnetic Resonance , State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University , Xiamen 361005, China
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31
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Zeng B, Zhang J, Fu R, Cai S, Chen Z. Study on structural variation of oxalate-oxodiperoxovanadate(V) from solid state to solution using NMR spectroscopy and theoretical calculation. INORG CHEM COMMUN 2009. [DOI: 10.1016/j.inoche.2009.09.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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32
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Yang MX, Lin S, Chen XH, Luo MH, Liu JH. Two organic–inorganic hybrid compounds constructed from 12-tungstovanadate and bipyridine. J COORD CHEM 2009. [DOI: 10.1080/00958970903431704] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Ming-Xing Yang
- a College of Chemistry and Material Science, Fujian Normal University , Fuzhou 350007, P.R. China
- b State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou 350002, P.R. China
| | - Shen Lin
- a College of Chemistry and Material Science, Fujian Normal University , Fuzhou 350007, P.R. China
- b State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou 350002, P.R. China
| | - Xiao-Hua Chen
- a College of Chemistry and Material Science, Fujian Normal University , Fuzhou 350007, P.R. China
- b State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou 350002, P.R. China
| | - Ming-Hong Luo
- a College of Chemistry and Material Science, Fujian Normal University , Fuzhou 350007, P.R. China
| | - Jiao-Hua Liu
- a College of Chemistry and Material Science, Fujian Normal University , Fuzhou 350007, P.R. China
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33
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Luo Z, Kögerler P, Cao R, Hill CL. Synthesis, Structure, and Magnetism of a Polyoxometalate with Coordinatively Unsaturated d-Electron-Transition Metal Centers. Inorg Chem 2009; 48:7812-7. [DOI: 10.1021/ic9007729] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zhen Luo
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
| | - Paul Kögerler
- Institut für Anorganische Chemie, RWTH Aachen University, 52074 Aachen, Germany
| | - Rui Cao
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
| | - Craig L. Hill
- Department of Chemistry, Emory University, Atlanta, Georgia 30322
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34
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Yang MX, Lin S, Chen LJ, Zhang XF, Xu HH. A novel 12-tungstovanadate and 3d–4d heterometallic complex hybrid compound [V1W12O40][VO2Ag(phen)3]2. INORG CHEM COMMUN 2009. [DOI: 10.1016/j.inoche.2009.04.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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35
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Ooms KJ, Bolte SE, Baruah B, Choudhary MA, Crans DC, Polenova T. (51)V solid-state NMR and density functional theory studies of eight-coordinate non-oxo vanadium complexes: oxidized amavadin. Dalton Trans 2009:3262-9. [PMID: 19421628 PMCID: PMC4212903 DOI: 10.1039/b820383k] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Using (51)V magic angle spinning solid-state NMR spectroscopy and density functional theory calculations we have characterized the chemical shift and quadrupolar coupling parameters for two eight-coordinate vanadium complexes, [PPh(4)][V(v)(HIDPA)(2)] and [PPh(4)][V(v)(HIDA)(2)]; HIDPA = 2,2'-(hydroxyimino)dipropionate and HIDA = 2,2'-(hydroxyimino)diacetate. The coordination geometry under examination is the less common non-oxo eight coordinate distorted dodecahedral geometry that has not been previously investigated by solid-state NMR spectroscopy. Both complexes were isolated by oxidizing their reduced forms: [V(iv)(HIDPA)(2)](2-) and [V(iv)(HIDA)(2)](2-). V(iv)(HIDPA)(2)(2-) is also known as amavadin, a vanadium-containing natural product present in the Amanita muscaria mushroom and is responsible for vanadium accumulation in nature. The quadrupolar coupling constants, C(Q), are found to be moderate, 5.0-6.4 MHz while the chemical shift anisotropies are relatively small for vanadium complexes, -420 and -360 ppm. The isotropic chemical shifts in the solid state are -220 and -228 ppm for the two compounds, and near the chemical shifts observed in solution. Presumably this is a consequence of the combined effects of the increased coordination number and the absence of oxo groups. Density functional theory calculations of the electric field gradient parameters are in good agreement with the NMR results while the chemical shift parameters show some deviation from the experimental values. Future work on this unusual coordination geometry and a combined analysis by solid-state NMR and density functional theory should provide a better understanding of the correlations between experimental NMR parameters and the local structure of the vanadium centers.
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Affiliation(s)
- Kristopher J. Ooms
- Department of Chemistry and Biochemistry, 036 Brown Laboratories, University of Delaware, Newark, Delaware 19716
| | - Stephanie E. Bolte
- Department of Chemistry and Biochemistry, 036 Brown Laboratories, University of Delaware, Newark, Delaware 19716
| | - Bharat Baruah
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523
| | - Muhammad Aziz Choudhary
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523
- Department of Chemistry, The University of Azad Jammu & Kashmir, Muzaffarabad 13100, Pakistan
| | - Debbie C. Crans
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523
| | - Tatyana Polenova
- Department of Chemistry and Biochemistry, 036 Brown Laboratories, University of Delaware, Newark, Delaware 19716
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Bolte SE, Ooms KJ, Polenova T, Baruah B, Crans DC, Smee JJ. 51V solid-state NMR and density functional theory studies of vanadium environments in V(V)O2 dipicolinic acid complexes. J Chem Phys 2008; 128:052317. [PMID: 18266434 DOI: 10.1063/1.2830239] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
(51)V solid-state NMR and density functional theory (DFT) investigations are reported for a series of pentacoordinate dioxovanadium(V)-dipicolinate [V(V)O(2)-dipicolinate] and heptacoordinate aquahydroxylamidooxovanadium(V)-dipicolinate [V(V)O-dipicolinate] complexes. These compounds are of interest because of their potency as phosphatase inhibitors as well as their insulin enhancing properties and potential for the treatment of diabetes. Experimental solid-state NMR results show that the electric field gradient tensors in the V(V)O(2)-dipicolinate derivatives are affected significantly by substitution on the dipicolinate ring and range from 5.8 to 8.3 MHz. The chemical shift anisotropies show less dramatic variations with respect to the ligand changes and range between -550 and -600 ppm. To gain insights on the origins of the NMR parameters, DFT calculations were conducted for an extensive series of the V(V)O(2)- and V(V)O-dipicolinate complexes. To assess the level of theory required for the accurate calculation of the (51)V NMR parameters, different functionals, basis sets, and structural models were explored in the DFT study. It is shown that the original x-ray crystallographic geometries, including all counterions and solvation water molecules within 5 A of the vanadium, lead to the most accurate results. The choice of the functional and the basis set at a high level of theory has a relatively minor impact on the outcome of the chemical shift anisotropy calculations; however, the use of large basis sets is necessary for accurate calculations of the quadrupole coupling constants for several compounds of the V(V)O(2) series. These studies demonstrate that even though the vanadium compounds under investigations exhibit distorted trigonal bipyramidal coordination geometry, they have a "perfect" trigonal bipyramidal electronic environment. This observation could potentially explain why vanadate and vanadium(V) adducts are often recognized as potent transition state analogs.
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Affiliation(s)
- Stephanie E Bolte
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
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37
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Chaumont A, Wipff G. Ion aggregation in concentrated aqueous and methanol solutions of polyoxometallates Keggin anions: the effect of counterions investigated by molecular dynamics simulations. Phys Chem Chem Phys 2008; 10:6940-53. [DOI: 10.1039/b810440a] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
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38
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Huang W, Vega AJ, Gullion T, Polenova T. Internuclear (31)P-(51)V distance measurements in polyoxoanionic solids using rotational echo adiabatic passage double resonance NMR spectroscopy. J Am Chem Soc 2007; 129:13027-34. [PMID: 17918932 PMCID: PMC3985602 DOI: 10.1021/ja073170l] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report the first results establishing rotational echo adiabatic passage double resonance (REAPDOR) experiments for distance measurements between a spin-1/2 (31P) and spin-7/2 (51V) pair in a series of vanadium-substituted polyoxoanionic solids from the Keggin and Wells-Dawson families. We have quantitatively measured 31P-51V distances in monovanadium substituted K4PVW11O40, 1-K7P2VW17O62, and 4-K7P2VW17O62. Numerical simulations of the experimental data yield very good agreement with the averaged P-W/P-V distances determined from the X-ray diffraction measurements in the same or related compounds. REAPDOR is therefore a very sensitive P-V distance probe anticipated to be especially useful in the absence of long-range order. Our results suggest that REAPDOR spectroscopy could be broadly applicable for interatomic distance measurements in other spin-7/2-spin-1/2 nuclear pairs.
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Affiliation(s)
- Wenlin Huang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716
| | - Alexander J. Vega
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716
| | - Terry Gullion
- Department of Chemistry, West Virginia University, Morgantown, WV 26506
| | - Tatyana Polenova
- Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716
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39
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Ooms KJ, Bolte SE, Smee JJ, Baruah B, Crans DC, Polenova T. Investigating the vanadium environments in hydroxylamido V(V) dipicolinate complexes using 51V NMR spectroscopy and density functional theory. Inorg Chem 2007; 46:9285-93. [PMID: 17902653 PMCID: PMC3985610 DOI: 10.1021/ic7012667] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Using (51)V magic angle spinning solid-state NMR, SSNMR, spectroscopy and quantum chemical DFT calculations we have characterized the chemical shift and quadrupolar coupling parameters of a series of eight hydroxylamido vanadium(V) dipicolinate complexes of the general formula VO(dipic)(ONR1R2)(H2O) where R1 and R2 can be H, CH3, or CH2CH3. This class of vanadium compounds was chosen for investigation because of their seven-coordinate vanadium atom, a geometry for which there is limited (51)V SSNMR data. Furthermore, a systematic series of compounds with different electronic properties are available and allows for the effects of ligand substitution on the NMR parameters to be studied. The quadrupolar coupling constants, C(Q), are small, 3.0-3.9 MHz, but exhibit variations as a function of the ligand substitution. The chemical shift tensors in the solid state are sensitive to changes in both the hydroxylamide substituent and the dipic ligand, a sensitivity which is not observed for isotropic chemical shifts in solution. The chemical shift tensors span approximately 1000 ppm and are nearly axially symmetric. On the basis of DFT calculations of the chemical shift tensors, one of the largest contributors to the magnetic shielding anisotropy is an occupied molecular orbital with significant vanadium d(z)2 character along the V=O bond.
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Affiliation(s)
- Kristopher J. Ooms
- Department of Chemistry and Biochemistry, 112 Lammot DuPont Laboratories, University of Delaware, Newark, Delaware 19716
| | - Stephanie E. Bolte
- Department of Chemistry and Biochemistry, 112 Lammot DuPont Laboratories, University of Delaware, Newark, Delaware 19716
| | - Jason J. Smee
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523
- Department of Chemistry, The University of Texas at Tyler, 3900 University Blvd., Tyler, Texas 75799
| | - Bharat Baruah
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523
| | - Debbie C. Crans
- Department of Chemistry, Colorado State University, Fort Collins, CO 80523
| | - Tatyana Polenova
- Department of Chemistry and Biochemistry, 112 Lammot DuPont Laboratories, University of Delaware, Newark, Delaware 19716
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Pooransingh-Margolis N, Renirie R, Hasan Z, Wever R, Vega AJ, Polenova T. 51V solid-state magic angle spinning NMR spectroscopy of vanadium chloroperoxidase. J Am Chem Soc 2007; 128:5190-208. [PMID: 16608356 DOI: 10.1021/ja060480f] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report 51V solid-state NMR spectroscopy of the 67.5-kDa vanadium chloroperoxidase, at 14.1 T. We demonstrate that, despite the low concentration of vanadium sites in the protein (one per molecule, 1 mumol of vanadium spins in the entire sample), the spinning sideband manifold spanning the central and the satellite transitions is readily detectable. The quadrupolar and chemical shift anisotropy tensors have been determined by numerical simulations of the spinning sideband envelopes and the line shapes of the individual spinning sidebands corresponding to the central transition. The observed quadrupolar coupling constant C(Q) of 10.5 +/- 1.5 MHz and chemical shift anisotropy delta(sigma) of -520 +/- 13 ppm are sensitive reporters of the geometric and electronic structure of the vanadium center. Density functional theory calculations of the NMR spectroscopic observables for an extensive series of active site models indicate that the vanadate cofactor is most likely anionic with one axial hydroxo- group and an equatorial plane consisting of one hydroxo- and two oxo- groups. The work reported in this manuscript is the first example of 51V solid-state NMR spectroscopy applied to probe the vanadium center in a protein directly. This approach yields the detailed coordination environment of the metal unavailable from other experimental measurements and is expected to be generally applicable for studies of diamagnetic vanadium sites in metalloproteins.
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Affiliation(s)
- Neela Pooransingh-Margolis
- Brown Laboratories, Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
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Chapman RP, Bryce DL. A high-field solid-state 35/37Cl NMR and quantum chemical investigation of the chlorine quadrupolar and chemical shift tensors in amino acid hydrochlorides. Phys Chem Chem Phys 2007; 9:6219-30. [DOI: 10.1039/b712688c] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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Huang W, Schopfer M, Zhang C, Howell RC, Gee BA, Francesconi LC, Polenova T. Probing Local Environments in Paramagnetic Europium-Substituted Keggin Solids by 31P Magic Angle Spinning NMR Spectroscopy. J Phys Chem B 2006; 110:12340-50. [PMID: 16800557 DOI: 10.1021/jp061990z] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Paramagnetic Eu-substituted Keggin oxopolytungstates crystallize in different forms, determined by the nature of the counterions. The crystal packing is in turn responsible for the variations in the geometry of paramagnetic Eu sites with respect to the anion core. We probed the paramagnetic environments in a series of Eu-substituted Keggin solids, by 31P magic angle spinning NMR spectroscopy. 31P spinning sideband envelopes are dominated by the electron-nuclear dipolar interaction. For the compounds under investigation, both the magnitude and the asymmetry parameter of the electron-nuclear dipolar coupling tensor are sensitive to the mutual arrangements of paramagnetic Eu sites in the crystal lattice. and also report on the stoichiometry of the anion. The electron-nuclear dipolar coupling tensors were calculated from the crystallographic coordinates and the experimentally determined effective magnetic moments, assuming a point dipole approximation. The computed tensors are in very good agreement with the experimental spectra. Furthermore, the P-Eu distance estimates, accurate to within 0.06-0.12 A, can be obtained directly from the magnitude of the electron-nuclear dipolar coupling. This work demonstrates that 31P MAS NMR spectroscopy is a useful probe for investigating local environments in paramagnetic Keggin solids.
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Affiliation(s)
- Wenlin Huang
- Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716, USA
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