1
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Huynh RPS, Evans DR, Lian JX, Spasyuk D, Siahrostrami S, Shimizu GKH. Creating Order in Ultrastable Phosphonate Metal-Organic Frameworks via Isolable Hydrogen-Bonded Intermediates. J Am Chem Soc 2023; 145:21263-21272. [PMID: 37738111 DOI: 10.1021/jacs.3c05279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/24/2023]
Abstract
The stability presented by trivalent metal-organic frameworks (MOFs) makes them an attractive class of materials. With phosphonate-based ligands, crystallization is a challenge, as there are significantly more binding motifs that can be adopted due to the extra oxygen tether compared to carboxylate counterparts and the self-assembly processes are less reversible. Despite this, we have reported charge-assisted hydrogen-bonded metal-organic frameworks (HMOFs) consisting of [Cr(H2O)6]3+ and phosphonate ligands, which were crystallographically characterized. We sought to use these HMOFs as a crystalline intermediate to synthesize ordered Cr(III)-phosphonate MOFs. This can be done by dehydrating the HMOF to remove the aquo ligands around the Cr(III) center, forcing metal-phosphonate coordination. Herein, a new porous HMOF, H-CALF-50, is synthesized and then dehydrated to yield the MOF CALF-50. CALF-50 is ordered, although it is not single crystalline. It does, however, have exceptional stability, maintaining crystallinity and surface area after boiling in water for 3 weeks and soaking in 14.5 M H3PO4 for 24 h and 9 M HCl for 72 h. Computational methods are used to study the HMOF to MOF transformation and give insight into the nature of the structure and the degree of heterogeneity.
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Affiliation(s)
- Racheal P S Huynh
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - David R Evans
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Jian Xiang Lian
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - Denis Spasyuk
- Canadian Light Source, 44 Innovation Boulevard, Saskatoon, Saskatchewan S7N 2 V3, Canada
| | - Samira Siahrostrami
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - George K H Shimizu
- Department of Chemistry, University of Calgary, Calgary, Alberta T2N 1N4, Canada
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2
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Krupa P, La Penna G, Li MS. Amyloid- β Tetramers and Divalent Cations at the Membrane/Water Interface: Simple Models Support a Functional Role. Int J Mol Sci 2023; 24:12698. [PMID: 37628878 PMCID: PMC10454299 DOI: 10.3390/ijms241612698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 08/04/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023] Open
Abstract
Charge polarization at the membrane interface is a fundamental process in biology. Despite the lower concentration compared to the abundant monovalent ions, the relative abundance of divalent cations (Ca2+, Mg2+, Zn2+, Fe2+, Cu2+) in particular spaces, such as the neuron synapse, raised many questions on the possible effects of free multivalent ions and of the required protection of membranes by the eventual defects caused by the free forms of the cations. In this work, we first applied a recent realistic model of divalent cations to a well-investigated model of a polar lipid bilayer, di-myristoyl phosphatidyl choline (DMPC). The full atomistic model allows a fairly good description of changes in the hydration of charged and polar groups upon the association of cations to lipid atoms. The lipid-bound configurations were analyzed in detail. In parallel, amyloid-β 1-42 (Aβ42) peptides assembled into tetramers were modeled at the surface of the same bilayer. Two of the protein tetramers' models were loaded with four Cu2+ ions, the latter bound as in DMPC-free Aβ42 oligomers. The two Cu-bound models differ in the binding topology: one with each Cu ion binding each of the monomers in the tetramer; one with pairs of Cu ions linking two monomers into dimers, forming tetramers as dimers of dimers. The models here described provide hints on the possible role of Cu ions in synaptic plasticity and of Aβ42 oligomers in storing the same ions away from lipids. The release of structurally disordered peptides in the synapse can be a mechanism to recover ion homeostasis and lipid membranes from changes in the divalent cation concentration.
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Affiliation(s)
- Pawel Krupa
- Institute of Physics, Polish Academy of Sciences, 02-668 Warsaw, Poland; (P.K.); (M.S.L.)
| | - Giovanni La Penna
- Institute of Chemistry of Organometallic Compounds, National Research Council, 50019 Sesto Fiorentino, Italy
- Section of Roma Tor Vergata, National Institute of Nuclear Physics, 00133 Roma, Italy
| | - Mai Suan Li
- Institute of Physics, Polish Academy of Sciences, 02-668 Warsaw, Poland; (P.K.); (M.S.L.)
- Institute for Computational Science and Technology, Ho Chi Minh City 700000, Vietnam
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3
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Suzuki R, Iki N. Kinetic aspects of iron(III)-chelation therapy with deferasirox (DFX) revealed by the solvolytic dissociation rate of the Fe(III)-DFX complex estimated with capillary electrophoretic reactor. J Inorg Biochem 2023; 241:112131. [PMID: 36706491 DOI: 10.1016/j.jinorgbio.2023.112131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 01/22/2023]
Abstract
Capillary electrophoresis was used to estimate the solvolytic dissociation rate (kd) of metal complexes of deferasirox (DFX, H3L), a drug used to treat iron overload. Inert CoIIIL23- did not dissociate. The estimated kd value for FeIIIL23- was (2.7 ± 0.3) × 10-4 s-1 (298 K, pH 7.4). The kd values of other complexes (AlIIIL23-, NiIIL24-, and MnIIL-) were in the range 10-3-10-4 s-1. In contrast, ZnIIL- and CuIIL- were too labile to allow kd estimation. The fact that the half-life of FeIIIL23- (43.3 min) is shorter than the blood half-life of DFX (8-16 h) implies that the blood concentration of DFX should be high enough to prevent dissociation of FeIIIL23-. The possibility of a safer iron-chelation therapy that avoids excretion of other essential metal ions such as ZnII is discussed, highlighting the importance of selectivity in terms of kinetic stability.
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Affiliation(s)
- Ryota Suzuki
- Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aramaki-Aoba, Aoba-ku, 980-8579, Sendai, Japan
| | - Nobuhiko Iki
- Graduate School of Environmental Studies, Tohoku University, 6-6-07 Aramaki-Aoba, Aoba-ku, 980-8579, Sendai, Japan.
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4
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Liang Q, Wells LA, Han K, Chen S, Kozlowski MC, Jia T. Synthesis of Sulfilimines Enabled by Copper-Catalyzed S-Arylation of Sulfenamides. J Am Chem Soc 2023; 145:6310-6318. [PMID: 36894165 PMCID: PMC10106277 DOI: 10.1021/jacs.2c12947] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
Herein, an unprecedented synthetic route to sulfilimines via a copper-catalyzed Chan-Lam-type coupling of sulfenamides is presented. A key to success in this novel transformation is the chemoselective S-arylation of S(II) sulfenamides to form S(IV) sulfilimines, overriding the competitive, and more thermodynamically favored, C-N bond formation that does not require a change in the sulfur oxidation state. Computations reveal that the selectivity arises from a selective transmetallation event where bidentate sulfenamide coordination through the sulfur and oxygen atoms favors the S-arylation pathway. The mild and environmentally benign catalytic conditions enable broad functional group compatibility, allowing a variety of diaryl or alkyl aryl sulfilimines to be efficiently prepared. The Chan-Lam coupling procedure could also tolerate alkenylboronic acids as coupling partners to afford alkenyl aryl sulfilimines, a class of scaffolds that cannot be directly synthesized via conventional imination strategies. The benzoyl-protecting groups could be conveniently removed from the product, which, in turn, could be readily transformed into several S(IV) and S(VI) derivatives.
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Affiliation(s)
- Qingjin Liang
- School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, P. R. China
- Research Center for Chemical Biology and Omics Analysis, Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, 1088 Xueyuan Blvd., Shenzhen, Guangdong, 518055, P. R. China
| | - Lucille A. Wells
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, 231 South 34 Street, Philadelphia, Pennsylvania 19104, United States
| | - Kaiming Han
- School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, P. R. China
| | - Shufeng Chen
- School of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot, 010021, P. R. China
| | - Marisa C. Kozlowski
- Department of Chemistry, Roy and Diana Vagelos Laboratories, University of Pennsylvania, 231 South 34 Street, Philadelphia, Pennsylvania 19104, United States
| | - Tiezheng Jia
- Research Center for Chemical Biology and Omics Analysis, Department of Chemistry, and Guangdong Provincial Key Laboratory of Catalysis, Southern University of Science and Technology, 1088 Xueyuan Blvd., Shenzhen, Guangdong, 518055, P. R. China
- State Key Laboratory of Elemento-Organic Chemistry, Nankai University, Tianjin, P. R. China
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5
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Jansen C, Tannert N, Lenzen D, Bengsch M, Millan S, Goldman A, Jordan DN, Sondermann L, Stock N, Janiak C. Unravelling gas sorption in the aluminum metal‐organic framework CAU‐23: CO
2
, H
2
, CH
4
, SO
2
sorption isotherms, enthalpy of adsorption and mixed‐adsorptive calculations. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202200170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Christian Jansen
- Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Niels Tannert
- Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Dirk Lenzen
- Institut für Anorganische Chemie Christian-Albrechts-Universität Kiel Max-Eyth-Straße 2 24118 Kiel Germany
| | - Marco Bengsch
- Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Simon Millan
- Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Anna Goldman
- Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Dustin Nils Jordan
- Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Linda Sondermann
- Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
| | - Norbert Stock
- Institut für Anorganische Chemie Christian-Albrechts-Universität Kiel Max-Eyth-Straße 2 24118 Kiel Germany
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie Heinrich-Heine-Universität Düsseldorf 40204 Düsseldorf Germany
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6
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Steinert DM, Schmitz A, Fetzer M, Seifert P, Janiak C. A caveat on the effect of modulators in the synthesis of the aluminum furandicarboylate metal‐organic framework MIL‐160. Z Anorg Allg Chem 2022. [DOI: 10.1002/zaac.202100380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Alexa Schmitz
- Heinrich Heine University Düsseldorf: Heinrich-Heine-Universitat Dusseldorf GERMANY
| | - Marcus Fetzer
- Heinrich Heine University Düsseldorf: Heinrich-Heine-Universitat Dusseldorf GERMANY
| | - Philipp Seifert
- Heinrich Heine University Düsseldorf: Heinrich-Heine-Universitat Dusseldorf GERMANY
| | - Christoph Janiak
- Heinrich-Heine-Universität Düsseldorf: Heinrich-Heine-Universitat Dusseldorf Institut für Anorganische Chemie und Strukturchemie Universitätsstr. 1 40225 Düsseldorf GERMANY
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7
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Steinert DM, Ernst S, Henninger SK, Janiak C. Metal‐Organic Frameworks as Sorption Materials for Heat Transformation Processes. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000834] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Dominik Moritz Steinert
- Institut für Anorganische Chemie und Strukturchemie Heinrich‐Heine‐Universität 40204 Düsseldorf Germany
| | - Sebastian‐Johannes Ernst
- Dept. Thermally Active Materials and Solar Cooling Fraunhofer Institute for Solar Energy Systems ISE Heidenhofstr. 2 79110 Freiburg Germany
| | - Stefan K. Henninger
- Dept. Thermally Active Materials and Solar Cooling Fraunhofer Institute for Solar Energy Systems ISE Heidenhofstr. 2 79110 Freiburg Germany
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie Heinrich‐Heine‐Universität 40204 Düsseldorf Germany
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8
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Abstract
AbstractThe totally symmetric stretching mode $$\nu_{1}$$ν1 Ln–(OH2) of the first hydration shells of all the rare earth (RE) ions across the series from lanthanum to lutetium has been measured on dilute aqueous perchlorate solutions at room temperature. An S-shaped relationship has been found between the $$\nu_{1}$$ν1 Ln–(OH2) peak positions and the Ln–(OH2) bond distances of the lanthanide(III) aqua ions. While the light rare earth ions form nona-hydrates, the heavy ones form octa-hydrates and the rare earth ions in the middle of the series show non integer hydration numbers between 9 and 8. A relationship between wavenumber positions $$\nu_{1}$$ν1 Ln–(OH2) and the Ln–(OH2) bond distances of the RE hydrates has been given. Recent quantum mechanical calculations support the given interpretation.
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9
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High catalytic activity and selectivity in hydrosilylation of new Pt(II) metallosupramolecular complexes based on ambidentate ligands. J Catal 2019. [DOI: 10.1016/j.jcat.2019.03.041] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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10
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Huang D, Liu Y, Liu Y, Di D, Wang H, Yang W. Preparation of metal–organic frameworks with bimetallic linkers and corresponding properties. NEW J CHEM 2019. [DOI: 10.1039/c9nj00433e] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of metal–organic frameworks (MOFs) with bimetallic linkers were synthesized through a facile reflux route.
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Affiliation(s)
- Dongdong Huang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou 730070
- P. R. China
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province
| | - Yi Liu
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences (CAS)
- Lanzhou 730000
- P. R. China
| | - Yongfeng Liu
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences (CAS)
- Lanzhou 730000
- P. R. China
| | - Duolong Di
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences (CAS)
- Lanzhou 730000
- P. R. China
| | - Hao Wang
- CAS Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine of Gansu Province
- Lanzhou Institute of Chemical Physics
- Chinese Academy of Sciences (CAS)
- Lanzhou 730000
- P. R. China
| | - Wu Yang
- College of Chemistry and Chemical Engineering
- Northwest Normal University
- Lanzhou 730070
- P. R. China
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11
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Lewis FW, Harwood LM, Hudson MJ, Afsar A, Laventine DM, Šťastná K, John J, Distler P. Separation of the Minor Actinides Americium(III) and Curium(III) by Hydrophobic and Hydrophilic BTPhen ligands: Exploiting Differences in their Rates of Extraction and Effective Separations at Equilibrium. SOLVENT EXTRACTION AND ION EXCHANGE 2018. [DOI: 10.1080/07366299.2018.1429358] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Frank W. Lewis
- Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, UK
| | | | - Michael J. Hudson
- Department of Chemistry, University of Reading, Whiteknights, Reading, UK
| | - Ashfaq Afsar
- Department of Chemistry, University of Reading, Whiteknights, Reading, UK
| | | | - Kamila Šťastná
- Department of Nuclear Chemistry, Czech Technical University in Prague, Břehová, Prague, Czech Republic
| | - Jan John
- Department of Nuclear Chemistry, Czech Technical University in Prague, Břehová, Prague, Czech Republic
| | - Petr Distler
- Department of Nuclear Chemistry, Czech Technical University in Prague, Břehová, Prague, Czech Republic
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12
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Distler P, Stamberg K, John J, Harwood LM, Lewis FW. Modelling of the Am(III) – Cm(III) kinetic separation effect observed during metal ion extraction by bis-(1,2,4)-triazine ligands. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1384017] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Petr Distler
- Department of Nuclear Chemistry, Czech Technical University in Prague, Prague 1, Czech Republic
| | - Karel Stamberg
- Department of Nuclear Chemistry, Czech Technical University in Prague, Prague 1, Czech Republic
| | - Jan John
- Department of Nuclear Chemistry, Czech Technical University in Prague, Prague 1, Czech Republic
| | | | - Frank W. Lewis
- Department of Applied Sciences, Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, UK
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13
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Chakraborty S, Pallada S, Pedersen JT, Jancso A, Correia JG, Hemmingsen L. Nanosecond Dynamics at Protein Metal Sites: An Application of Perturbed Angular Correlation (PAC) of γ-Rays Spectroscopy. Acc Chem Res 2017; 50:2225-2232. [PMID: 28832106 DOI: 10.1021/acs.accounts.7b00219] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Metalloproteins are essential to numerous reactions in nature, and constitute approximately one-third of all known proteins. Molecular dynamics of proteins has been elucidated with great success both by experimental and theoretical methods, revealing atomic level details of function involving the organic constituents on a broad spectrum of time scales. However, the characterization of dynamics at biomolecular metal sites on nanosecond time scales is scarce in the literature. The aqua ions of many biologically relevant metal ions exhibit exchange of water molecules on the nanosecond time scale or faster, often defining their reactivity in aqueous solution, and this is presumably also a relevant time scale for the making and breaking of coordination bonds between metal ions and ligands at protein metal sites. Ligand exchange dynamics is critical for a variety of elementary steps of reactions in metallobiochemistry, for example, association and dissociation of metal bound water, association of substrate and dissociation of product in the catalytic cycle of metalloenzymes, at regulatory metal sites which require binding and dissociation of metal ions, as well as in the transport of metal ions across cell membranes or between proteins involved in metal ion homeostasis. In Perturbed Angular Correlation of γ-rays (PAC) spectroscopy, the correlation in time and space of two γ-rays emitted successively in a nuclear decay is recorded, reflecting the hyperfine interactions of the PAC probe nucleus with the surroundings. This allows for characterization of molecular and electronic structure as well as nanosecond dynamics at the PAC probe binding site. Herein, selected examples describing the application of PAC spectroscopy in probing the dynamics at protein metal sites are presented, including (1) exchange of Cd2+ bound water in de novo designed synthetic proteins, and the effect of remote mutations on metal site dynamics; (2) dynamics at the β-lactamase active site, where the metal ion appears to jump between the two adjacent sites; (3) structural relaxation in small blue copper proteins upon 111Ag+ to 111Cd2+ transformation in radioactive nuclear decay; (4) metal ion transfer between two HAH1 proteins with change in coordination number; and (5) metal ion sensor proteins with two coexisting metal site structures. With this Account, we hope to make our modest contribution to the field and perhaps spur additional interest in dynamics at protein metal sites, which we consider to be severely underexplored. Relatively little is known about detailed atomic motions at metal sites, for example, how ligand exchange processes affect protein function, and how the amino acid composition of the protein may control this facet of metal site characteristics. We also aim to provide the reader with a qualitative impression of the possibilities offered by PAC spectroscopy in bioinorganic chemistry, especially when elucidating dynamics at protein metal sites, and finally present data that may serve as benchmarks on a relevant time scale for development and tests of theoretical molecular dynamics methods applied to biomolecular metal sites.
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Affiliation(s)
- Saumen Chakraborty
- Department
of Chemistry and Biochemistry, University of Mississippi, University, Mississippi 38677, United States
| | - Stavroula Pallada
- ISOLDE/CERN, PH
Div, CH-1211 Geneve
23, Switzerland
- Department
of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 København Ø, Denmark
| | - Jeppe T. Pedersen
- Department
of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 København Ø, Denmark
| | - Attila Jancso
- Department
of Inorganic and Analytical Chemistry, University of Szeged, Dóm
tér 7, H-6720 Szeged, Hungary
| | - Joao G. Correia
- ISOLDE/CERN, PH
Div, CH-1211 Geneve
23, Switzerland
- Centro
de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, 2695-066 Bobadela, Portugal
| | - Lars Hemmingsen
- Department
of Chemistry, University of Copenhagen, Universitetsparken 5, DK-2100 København Ø, Denmark
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14
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Soldatova AV, Tao L, Romano CA, Stich TA, Casey WH, Britt RD, Tebo BM, Spiro TG. Mn(II) Oxidation by the Multicopper Oxidase Complex Mnx: A Binuclear Activation Mechanism. J Am Chem Soc 2017; 139:11369-11380. [PMID: 28712284 DOI: 10.1021/jacs.7b02771] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The bacterial protein complex Mnx contains a multicopper oxidase (MCO) MnxG that, unusually, catalyzes the two-electron oxidation of Mn(II) to MnO2 biomineral, via a Mn(III) intermediate. Although Mn(III)/Mn(II) and Mn(IV)/Mn(III) reduction potentials are expected to be high, we find a low reduction potential, 0.38 V (vs Normal Hydrogen Electrode, pH 7.8), for the MnxG type 1 Cu2+, the electron acceptor. Indeed the type 1 Cu2+ is not reduced by Mn(II) in the absence of molecular oxygen, indicating that substrate oxidation requires an activation step. We have investigated the enzyme mechanism via electronic absorption spectroscopy, using chemometric analysis to separate enzyme-catalyzed MnO2 formation from MnO2 nanoparticle aging. The nanoparticle aging time course is characteristic of nucleation and particle growth; rates for these processes followed expected dependencies on Mn(II) concentration and temperature, but exhibited different pH optima. The enzymatic time course is sigmoidal, signaling an activation step, prior to turnover. The Mn(II) concentration and pH dependence of a preceding lag phase indicates weak Mn(II) binding. The activation step is enabled by a pKa > 8.6 deprotonation, which is assigned to Mn(II)-bound H2O; it induces a conformation change (consistent with a high activation energy, 106 kJ/mol) that increases Mn(II) affinity. Mnx activation is proposed to decrease the Mn(III/II) reduction potential below that of type 1 Cu(II/I) by formation of a hydroxide-bridged binuclear complex, Mn(II)(μ-OH)Mn(II), at the substrate site. Turnover is found to depend cooperatively on two Mn(II) and is enabled by a pKa 7.6 double deprotonation. It is proposed that turnover produces a Mn(III)(μ-OH)2Mn(III) intermediate that proceeds to the enzyme product, likely Mn(IV)(μ-O)2Mn(IV) or an oligomer, which subsequently nucleates MnO2 nanoparticles. We conclude that Mnx exploits manganese polynuclear chemistry in order to facilitate an otherwise difficult oxidation reaction, as well as biomineralization. The mechanism of the Mn(III/IV) conversion step is elucidated in an accompanying paper .
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Affiliation(s)
- Alexandra V Soldatova
- Department of Chemistry, University of Washington , Box 351700, Seattle, Washington 98195, United States
| | | | - Christine A Romano
- Division of Environmental and Biomolecular Systems, Institute of Environmental Health, Oregon Health & Science University , Portland, Oregon 97239, United States
| | | | | | | | - Bradley M Tebo
- Division of Environmental and Biomolecular Systems, Institute of Environmental Health, Oregon Health & Science University , Portland, Oregon 97239, United States
| | - Thomas G Spiro
- Department of Chemistry, University of Washington , Box 351700, Seattle, Washington 98195, United States
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15
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Metal coordinated pyrrole-based macrocycles as contrast agents for magnetic resonance imaging technologies: Synthesis and applications. Coord Chem Rev 2017. [DOI: 10.1016/j.ccr.2016.11.011] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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16
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Stachura M, Chakraborty S, Gottberg A, Ruckthong L, Pecoraro VL, Hemmingsen L. Direct Observation of Nanosecond Water Exchange Dynamics at a Protein Metal Site. J Am Chem Soc 2016; 139:79-82. [PMID: 27973778 DOI: 10.1021/jacs.6b11525] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Nanosecond ligand exchange dynamics at metal sites within proteins is essential in catalysis, metal ion transport, and regulatory metallobiochemistry. Herein we present direct observation of the exchange dynamics of water at a Cd2+ binding site within two de novo designed metalloprotein constructs using 111mCd perturbed angular correlation (PAC) of γ-rays and 113Cd NMR spectroscopy. The residence time of the Cd2+-bound water molecule is tens of nanoseconds at 20 °C in both proteins. This constitutes the first direct experimental observation of the residence time of Cd2+ coordinated water in any system, including the simple aqua ion. A Leu to Ala amino acid substitution ∼10 Å from the Cd2+ site affects both the equilibrium constant and the residence time of water, while, surprisingly, the metal site structure, as probed by PAC spectroscopy, remains essentially unaltered. This implies that remote mutations may affect metal site dynamics, even when structure is conserved.
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Affiliation(s)
- Monika Stachura
- Department of Chemistry, University of Copenhagen , Universitetsparken 5, 2100 København Ø, Denmark
| | - Saumen Chakraborty
- Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109-1055, United States
| | | | - Leela Ruckthong
- Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109-1055, United States
| | - Vincent L Pecoraro
- Department of Chemistry, University of Michigan , Ann Arbor, Michigan 48109-1055, United States
| | - Lars Hemmingsen
- Department of Chemistry, University of Copenhagen , Universitetsparken 5, 2100 København Ø, Denmark
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Shahsavani MB, Ahmadi S, Aseman MD, Nabavizadeh SM, Rashidi M, Asadi Z, Erfani N, Ghasemi A, Saboury AA, Niazi A, Bahaoddini A, Yousefi R. Anticancer activity assessment of two novel binuclear platinum (II) complexes. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2016; 161:345-54. [DOI: 10.1016/j.jphotobiol.2016.05.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Revised: 05/14/2016] [Accepted: 05/30/2016] [Indexed: 11/29/2022]
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18
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Krahn E, Marie C, Nash K. Probing organic phase ligand exchange kinetics of 4f/5f solvent extraction systems with NMR spectroscopy. Coord Chem Rev 2016. [DOI: 10.1016/j.ccr.2016.01.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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19
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Karimi S, Tei L, Botta M, Helm L. Evaluation of Water Exchange Kinetics on [Ln(AAZTAPh–NO2)(H2O)q]x Complexes Using Proton Nuclear Magnetic Resonance. Inorg Chem 2016; 55:6300-7. [DOI: 10.1021/acs.inorgchem.6b00976] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shima Karimi
- Laboratoire
de Chimie Inorganique et Bioinorganique, Ecole Polytechnique Fédérale de Lausanne (EPFL-BCH), CH-1015 Lausanne, Switzerland
| | - Lorenzo Tei
- Dipartimento
di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, 15121 Alessandria, Italy
| | - Mauro Botta
- Dipartimento
di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale “A. Avogadro”, Viale T. Michel 11, 15121 Alessandria, Italy
| | - Lothar Helm
- Laboratoire
de Chimie Inorganique et Bioinorganique, Ecole Polytechnique Fédérale de Lausanne (EPFL-BCH), CH-1015 Lausanne, Switzerland
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20
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Munzert SM, Schwarz G, Kurth DG. Kinetic Studies of the Coordination of Mono- and Ditopic Ligands with First Row Transition Metal Ions. Inorg Chem 2016; 55:2565-73. [PMID: 26908136 DOI: 10.1021/acs.inorgchem.5b02931] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reactions of the ditopic ligand 1,4-bis(2,2':6',2″-terpyridin-4'-yl)benzene (1) as well as the monotopic ligands 4'-phenyl-2,2':6',2″-terpyridine (2) and 2,2':6',2″-terpyridine (3) with Fe(2+), Co(2+), and Ni(2+) in solution are studied. While the reaction of 1 with Fe(2+), Co(2+), and Ni(2+) results in metallo-supramolecular coordination polyelectrolytes (MEPEs), ligands 2 and 3 give mononuclear complexes. All compounds are analyzed by UV/vis and fluorescence spectroscopy. Fluorescence spectroscopy indicates that protonation as well as coordination to Zn(2+) leads to an enhanced fluorescence of the terpyridine ligands. In contrast, Fe(2+), Co(2+), or Ni(2+) quench the fluorescence of the ligands. The kinetics of the reactions are studied by stopped-flow fluorescence spectroscopy. Analysis of the measured data is presented and the full kinetic rate laws for the coordination of the terpyridine ligands 1, 2, and 3 to Fe(2+), Co(2+), and Ni(2+) are presented. The coordination occurs within a few seconds, and the rate constant increases in the order Ni(2+) < Co(2+) < Fe(2+). With the rate constants at hand, the polymer growth of Ni-MEPE is computed.
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Affiliation(s)
- Stefanie Martina Munzert
- Chemische Technologie der Materialsynthese, Julius-Maximilians-Universität Würzburg , Röntgenring 11, D-97070 Würzburg, Germany
| | - Guntram Schwarz
- Chemische Technologie der Materialsynthese, Julius-Maximilians-Universität Würzburg , Röntgenring 11, D-97070 Würzburg, Germany
| | - Dirk G Kurth
- Chemische Technologie der Materialsynthese, Julius-Maximilians-Universität Würzburg , Röntgenring 11, D-97070 Würzburg, Germany
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21
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22
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Pizzanelli S, Forte C, Pinzino C, Magrì A, La Mendola D. Copper(ii) complexes with peptides based on the second cell binding site of fibronectin: metal coordination and ligand exchange kinetics. Phys Chem Chem Phys 2016; 18:3982-94. [DOI: 10.1039/c5cp05798a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Copper(ii) complexes with short peptides based on the second cell binding site of fibronectin, PHSFN and PHSEN, have been characterized by potentiometric, UV-vis, CD, EPR and NMR spectroscopic methods.
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Affiliation(s)
- Silvia Pizzanelli
- Istituto di Chimica dei Composti OrganoMetallici
- Consiglio Nazionale delle Ricerche-CNR
- 1, 56124 Pisa
- Italy
| | - Claudia Forte
- Istituto di Chimica dei Composti OrganoMetallici
- Consiglio Nazionale delle Ricerche-CNR
- 1, 56124 Pisa
- Italy
| | - Calogero Pinzino
- Istituto di Chimica dei Composti OrganoMetallici
- Consiglio Nazionale delle Ricerche-CNR
- 1, 56124 Pisa
- Italy
| | - Antonio Magrì
- Istituto di Biostrutture e Bioimmagini
- Consiglio Nazionale delle Ricerche-CNR
- 95126 Catania
- Italy
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23
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Bodizs G, Helm L. Solvent Exchange and Electron-Spin Relaxation on Homoleptic Acetonitrile Complexes of Trivalent Lanthanides. Inorg Chem 2015; 54:1974-82. [DOI: 10.1021/ic5028493] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gabriella Bodizs
- Institut des sciences et ingénierie chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Lothar Helm
- Institut des sciences et ingénierie chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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24
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Rocha BGM, Kuznetsov ML, Kozlov YN, Pombeiro AJL, Shul'pin GB. Simple soluble Bi(iii) salts as efficient catalysts for the oxidation of alkanes with H2O2. Catal Sci Technol 2015. [DOI: 10.1039/c4cy01651c] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Simple soluble Bi(iii) salts exhibit pronounced catalytic activity in the oxidation of inert alkanes with H2O2via a radical mechanism with participation of the HO˙ radicals.
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Affiliation(s)
- Bruno G. M. Rocha
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisbon
- Portugal
| | - Maxim L. Kuznetsov
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisbon
- Portugal
| | - Yuriy N. Kozlov
- Semenov Institute of Chemical Physics
- Russian Academy of Sciences
- Moscow 119991
- Russia
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural
- Instituto Superior Técnico
- Universidade de Lisboa
- 1049-001 Lisbon
- Portugal
| | - Georgiy B. Shul'pin
- Semenov Institute of Chemical Physics
- Russian Academy of Sciences
- Moscow 119991
- Russia
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25
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Annapureddy HVR, Dang LX. Understanding the rates and molecular mechanism of water-exchange around aqueous ions using molecular simulations. J Phys Chem B 2014; 118:8917-27. [PMID: 24911526 DOI: 10.1021/jp502922c] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Solvation processes occurring around aqueous ions are of fundamental importance in physics, chemistry, and biology. Over the past few decades, several experimental and theoretical studies were devoted to understanding ion solvation and the processes involved in it. In this article, we present a summary of our recent efforts that, through computer simulations, focused on providing a comprehensive understanding of solvent-exchange processes around aqueous ions. To accomplish these activities, we have looked at the mechanistic properties associated with the water-exchange process, such as potentials of mean force, time-dependent transmission coefficients, and the corresponding rate constants using transition state theory, the reactive flux method, and Grote-Hynes treatments of the dynamic response of the solvent.
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Affiliation(s)
- Harsha V R Annapureddy
- Physical Sciences Division, Pacific Northwest National Laboratory , Richland, Washington 93352, United States
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26
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Panasci AF, Harley SJ, Zavarin M, Casey WH. Kinetic studies of the [NpO(2)(CO(3))(3)](4-) ion at alkaline conditions using (13)C NMR. Inorg Chem 2014; 53:4202-8. [PMID: 24689949 DOI: 10.1021/ic500314v] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Carbonate ligand-exchange rates on the [NpO2(CO3)3]4– ion were determined using a saturation-transfer 13C nuclear magnetic resonance (NMR) pulse sequence in the pH range of 8.1 ≤ pH ≤ 10.5. Over the pH range 9.3 ≤ pH ≤ 10.5, which compares most directly with previous work of Stout et al.,1 we find an average rate, activation energy, enthalpy, and entropy of kex298 = 40.6(±4.3) s–1, Ea =45.1(±3.8) kJ mol–1, ΔH‡ = 42.6(±3.8) kJ mol–1, and ΔS‡ = −72(±13) J mol–1 K–1, respectively. These activation parameters are similar to the Stout et al. results at pH 9.4. However, their room-temperature rate at pH 9.4, kex298 = 143(±1.0) s–1, is 3 times faster than what we experimentally determined at pH 9.3: kex298 = 45.4(±5.3) s–1. Our rates for [NpO2(CO3)3]4– are also faster by a factor of 3 relative to the isoelectronic [UO2(CO3)3]4– as reported by Brucher et al.2 of kex298 = 13(±3) s–1. Consistent with results for the [UO2(CO3)3]4– ion, we find evidence for a proton-enhanced pathway for carbonate exchange for the [NpO2(CO3)3]4– ion at pH < 9.0.
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Affiliation(s)
- Adele F Panasci
- Department of Chemistry and ‡Department of Earth and Planetary Sciences, University of California, Davis , One Shields Avenue, Davis, California 95616, United States
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27
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Wall TF, Jan S, Autillo M, Nash KL, Guerin L, Naour CL, Moisy P, Berthon C. Paramagnetism of Aqueous Actinide Cations. Part I: Perchloric Acid Media. Inorg Chem 2014; 53:2450-9. [DOI: 10.1021/ic402371x] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Thomas F. Wall
- Department
of Chemistry, Washington State University, Pullman, Washington 99163, United States
| | - Steve Jan
- Nuclear Energy Division, RadioChemistry & Processes Department, Modelisation and Chemistry of Separation Processes Service, Ligand Actinide Interaction Laboratory, CEA, F-30207 Bagnols-sur-Cèze, France
| | - Matthieu Autillo
- Nuclear Energy Division, RadioChemistry & Processes Department, Modelisation and Chemistry of Separation Processes Service, Ligand Actinide Interaction Laboratory, CEA, F-30207 Bagnols-sur-Cèze, France
| | - Kenneth L. Nash
- Department
of Chemistry, Washington State University, Pullman, Washington 99163, United States
| | - Laetitia Guerin
- Nuclear Energy Division, RadioChemistry & Processes Department, Modelisation and Chemistry of Separation Processes Service, Ligand Actinide Interaction Laboratory, CEA, F-30207 Bagnols-sur-Cèze, France
| | - Claire Le Naour
- IPN Orsay, University Paris XI, rue Georges
Clemenceau, 91406 Orsay CEDEX, France
| | - Philippe Moisy
- Nuclear Energy Division, RadioChemistry & Processes Department, CEA, F-30207 Bagnols-sur-Cèze, France
| | - Claude Berthon
- Nuclear Energy Division, RadioChemistry & Processes Department, Modelisation and Chemistry of Separation Processes Service, Ligand Actinide Interaction Laboratory, CEA, F-30207 Bagnols-sur-Cèze, France
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28
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Qazi S, Uchida M, Usselman R, Shearer R, Edwards E, Douglas T. Manganese(III) porphyrins complexed with P22 virus-like particles as T1-enhanced contrast agents for magnetic resonance imaging. J Biol Inorg Chem 2014; 19:237-46. [PMID: 24362518 PMCID: PMC4115648 DOI: 10.1007/s00775-013-1075-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2013] [Accepted: 12/04/2013] [Indexed: 11/28/2022]
Abstract
Virus-like particles are powerful platforms for the development of functional hybrid materials. Here, we have grown a cross-linked polymer (cross-linked aminoethyl methacrylate) within the confines of the bacteriophage P22 capsid (P22-xAEMA) and functionalized the polymer with various loadings of paramagnetic manganese(III) protoporphyrin IX (MnPP) complexes for evaluation as a macromolecular magnetic resonance imaging contrast agent. The resulting construct (P22-xAEMA-MnPP) has r1,particle = 7,098 mM(-1) s(-1) at 298 K and 2.1 T (90 MHz) for a loading of 3,646 MnPP molecules per capsid. The Solomon-Bloembergen-Morgan theory for paramagnetic relaxivity predicts conjugating MnPP to P22, a supramolecular structure, would result in an enhancement in ionic relaxivity; however, all loadings experienced low ionic relaxivities, r 1,ionic, ranging from 1.45 to 3.66 mM(-1) s(-1), similar to the ionic relaxivity of free MnPP. We hypothesize that intermolecular interactions between neighboring MnPP molecules block access of water to the metal site, resulting in low r 1,ionic relaxivities. We investigated the effect of MnPP interactions on relaxivity further by either blocking or exposing water binding sites on MnPP. On the basis of these results, future design strategies for enhanced r 1,ionic relaxivity are suggested. The measured r 2,ionic relaxivities demonstrated an inverse relationship between loading and relaxivity. This results in a loading-dependent r 2/r 1 behavior of these materials indicating synthetic control over the relaxivity properties, making them interesting alternatives to current magnetic resonance imaging contrast agents.
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Affiliation(s)
- Shefah Qazi
- Chemistry and Biochemistry Department, Montana State University, Bozeman, MT, 59717, USA
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Verma KD, Forgács A, Uh H, Beyerlein M, Maier ME, Petoud S, Botta M, Logothetis NK. New calcium-selective smart contrast agents for magnetic resonance imaging. Chemistry 2013; 19:18011-26. [PMID: 24353083 DOI: 10.1002/chem.201300169] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 08/25/2013] [Indexed: 11/06/2022]
Abstract
Calcium plays a vital role in the human body and especially in the central nervous system. Precise maintenance of Ca(2+) levels is very crucial for normal cell physiology and health. The deregulation of calcium homeostasis can lead to neuronal cell death and brain damage. To study this functional role played by Ca(2+) in the brain noninvasively by using magnetic resonance imaging, we have synthesized a new set of Ca(2+) -sensitive smart contrast agents (CAs). The agents were found to be highly selective to Ca(2+) in the presence of other competitive anions and cations in buffer and in physiological fluids. The structure of CAs comprises Gd(3+)-DO3A (DO3A=1,4,7-tris(carboxymethyl)-1,4,7,10-tetraazacyclododecane) coupled to a Ca(2+) chelator o-amino phenol-N,N,O-triacetate (APTRA). The agents are designed to sense Ca(2+) present in extracellular fluid of the brain where its concentration is relatively high, that is, 1.2-0.8 mM. The determined dissociation constant of the CAs to Ca(2+) falls in the range required to sense and report changes in extracellular Ca(2+) levels followed by an increase in neural activity. In buffer, with the addition of Ca(2+) the increase in relaxivity ranged from 100-157%, the highest ever known for any T1-based Ca(2+)-sensitive smart CA. The CAs were analyzed extensively by the measurement of luminescence lifetime measurement on Tb(3+) analogues, nuclear magnetic relaxation dispersion (NMRD), and (17)O NMR transverse relaxation and shift experiments. The results obtained confirmed that the large relaxivity enhancement observed upon Ca(2+) addition is due to the increase of the hydration state of the complexes together with the slowing down of the molecular rotation and the retention of a significant contribution of the water molecules of the second sphere of hydration.
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Affiliation(s)
- Kirti Dhingra Verma
- Max Planck Institute for Biological Cybernetics, Dept. of Physiology of Cognitive Processes, 72076 Tübingen (Germany); Present address: Case NFCR Center for Imaging Research, Dept. of Radiology, Case Western Reserve University, Cleveland, OH (USA).
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30
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Strategies for optimizing water-exchange rates of lanthanide-based contrast agents for magnetic resonance imaging. Molecules 2013; 18:9352-81. [PMID: 23921796 PMCID: PMC3775326 DOI: 10.3390/molecules18089352] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2013] [Revised: 07/28/2013] [Accepted: 07/31/2013] [Indexed: 11/16/2022] Open
Abstract
This review describes recent advances in strategies for tuning the water-exchange rates of contrast agents for magnetic resonance imaging (MRI). Water-exchange rates play a critical role in determining the efficiency of contrast agents; consequently, optimization of water-exchange rates, among other parameters, is necessary to achieve high efficiencies. This need has resulted in extensive research efforts to modulate water-exchange rates by chemically altering the coordination environments of the metal complexes that function as contrast agents. The focus of this review is coordination-chemistry-based strategies used to tune the water-exchange rates of lanthanide(III)-based contrast agents for MRI. Emphasis will be given to results published in the 21st century, as well as implications of these strategies on the design of contrast agents.
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Guan X, Chan SLF, Che CM. A Highly Oxidizing and Isolable Oxoruthenium(V) Complex [RuV(N4O)(O)]2+: Electronic Structure, Redox Properties, and Oxidation Reactions Investigated by DFT Calculations. Chem Asian J 2013; 8:2046-56. [DOI: 10.1002/asia.201300458] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Indexed: 11/11/2022]
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Cittadino E, Botta M, Tei L, Kielar F, Stefania R, Chiavazza E, Aime S, Terreno E. In Vivo Magnetic Resonance Imaging Detection of Paramagnetic Liposomes Loaded with Amphiphilic Gadolinium(III) Complexes: Impact of Molecular Structure on Relaxivity and Excretion Efficiency. Chempluschem 2013; 78:712-722. [DOI: 10.1002/cplu.201300096] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Indexed: 01/30/2023]
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Gavriluta A, Büchel GE, Freitag L, Novitchi G, Tommasino JB, Jeanneau E, Kuhn PS, González L, Arion VB, Luneau D. Mechanism elucidation of the cis-trans isomerization of an azole ruthenium-nitrosyl complex and its osmium counterpart. Inorg Chem 2013; 52:6260-72. [PMID: 23675748 PMCID: PMC3673021 DOI: 10.1021/ic4004824] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Indexed: 11/29/2022]
Abstract
Synthesis and X-ray diffraction structures of cis and trans isomers of ruthenium and osmium metal complexes of general formulas (nBu4N)[cis-MCl4(NO)(Hind)], where M = Ru (1) and Os (3), and (nBu4N)[trans-MCl4(NO)(Hind)], where M = Ru (2) and Os (4) and Hind = 1H-indazole are reported. Interconversion between cis and trans isomers at high temperatures (80-130 °C) has been observed and studied by NMR spectroscopy. Kinetic data indicate that isomerizations correspond to reversible first order reactions. The rates of isomerization reactions even at 110 °C are very low with rate constants of 10(-5) s(-1) and 10(-6) s(-1) for ruthenium and osmium complexes, respectively, and the estimated rate constants of isomerization at room temperature are of ca. 10(-10) s(-1). The activation parameters, which have been obtained from fitting the reaction rates at different temperatures to the Eyring equation for ruthenium [ΔH(cis-trans)‡ = 122.8 ± 1.3; ΔH(trans-cis)‡ = 138.8 ± 1.0 kJ/mol; ΔS(cis-trans)‡ = -18.7 ± 3.6; ΔS(trans-cis)‡ = 31.8 ± 2.7 J/(mol·K)] and osmium [ΔH(cis-trans)‡ = 200.7 ± 0.7; ΔH(trans-cis)‡ = 168.2 ± 0.6 kJ/mol; ΔS(cis-trans)‡ = 142.7 ± 8.9; ΔS(trans-cis)‡ = 85.9 ± 3.9 J/(mol·K)] reflect the inertness of these systems. The entropy of activation for the osmium complexes is highly positive and suggests the dissociative mechanism of isomerization. In the case of ruthenium, the activation entropy for the cis to trans isomerization is negative [-18.6 J/(mol·K)], while being positive [31.0 J/(mol·K)] for the trans to cis conversion. The thermodynamic parameters for cis to trans isomerization of [RuCl4(NO)(Hind)]-, viz. ΔH° = 13.5 ± 1.5 kJ/mol and ΔS° = -5.2 ± 3.4 J/(mol·K) indicate the low difference between the energies of cis and trans isomers. The theoretical calculation has been carried out on isomerization of ruthenium complexes with DFT methods. The dissociative, associative, and intramolecular twist isomerization mechanisms have been considered. The value for the activation energy found for the dissociative mechanism is in good agreement with experimental activation enthalpy. Electrochemical investigation provides further evidence for higher reactivity of ruthenium complexes compared to that of osmium counterparts and shows that intramolecular electron transfer reactions do not affect the isomerization process. A dissociative mechanism of cis↔trans isomerization has been proposed for both ruthenium and osmium complexes.
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Affiliation(s)
- Anatolie Gavriluta
- Université Claude Bernard Lyon 1, Laboratoire des Multimatériaux et Interfaces (UMR 5615),
Campus de la Doua, 69622 Villeurbanne Cedex, France
- University of Vienna, Institute of Inorganic Chemistry, Währinger Strasse 42,
A-1090 Vienna, Austria
| | - Gabriel E. Büchel
- Université Claude Bernard Lyon 1, Laboratoire des Multimatériaux et Interfaces (UMR 5615),
Campus de la Doua, 69622 Villeurbanne Cedex, France
- University of Vienna, Institute of Inorganic Chemistry, Währinger Strasse 42,
A-1090 Vienna, Austria
| | - Leon Freitag
- University of Vienna, Institute of Theoretical Chemistry,
Währinger Strasse 17, A-1090 Vienna, Austria
| | - Ghenadie Novitchi
- Université Claude Bernard Lyon 1, Laboratoire des Multimatériaux et Interfaces (UMR 5615),
Campus de la Doua, 69622 Villeurbanne Cedex, France
- Laboratoire National des Champs Magnétiques
Intenses-CNRS, Université Joseph Fourier, 25 Avenue des Martyrs, 38042 Grenoble Cedex 9, France
| | - Jean Bernard Tommasino
- Université Claude Bernard Lyon 1, Laboratoire des Multimatériaux et Interfaces (UMR 5615),
Campus de la Doua, 69622 Villeurbanne Cedex, France
| | - Erwann Jeanneau
- Université Claude Bernard Lyon 1, Laboratoire des Multimatériaux et Interfaces (UMR 5615),
Campus de la Doua, 69622 Villeurbanne Cedex, France
| | - Paul-Steffen Kuhn
- University of Vienna, Institute of Inorganic Chemistry, Währinger Strasse 42,
A-1090 Vienna, Austria
| | - Leticia González
- University of Vienna, Institute of Theoretical Chemistry,
Währinger Strasse 17, A-1090 Vienna, Austria
| | - Vladimir B. Arion
- University of Vienna, Institute of Inorganic Chemistry, Währinger Strasse 42,
A-1090 Vienna, Austria
| | - Dominique Luneau
- Université Claude Bernard Lyon 1, Laboratoire des Multimatériaux et Interfaces (UMR 5615),
Campus de la Doua, 69622 Villeurbanne Cedex, France
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Novikov AS, Kuznetsov ML, Pombeiro AJL, Bokach NA, Shul’pin GB. Generation of HO• Radical from Hydrogen Peroxide Catalyzed by Aqua Complexes of the Group III Metals [M(H2O)n]3+ (M = Ga, In, Sc, Y, or La): A Theoretical Study. ACS Catal 2013. [DOI: 10.1021/cs400155q] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexander S. Novikov
- Centro de Química Estrutural, Complexo I, Instituto Superior
Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
- Department of Chemistry, Moscow State Pedagogical University, 3 Nesvizhskiy per., 119021
Moscow, Russian Federation
| | - Maxim L. Kuznetsov
- Centro de Química Estrutural, Complexo I, Instituto Superior
Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
- Department of Chemistry, Saint Petersburg State University, Universitetsky Pr., 26, 198504 Stary Petergof, Russian Federation
| | - Armando J. L. Pombeiro
- Centro de Química Estrutural, Complexo I, Instituto Superior
Técnico, Technical University of Lisbon, Av. Rovisco Pais, 1049-001 Lisbon, Portugal
| | - Nadezhda A. Bokach
- Department of Chemistry, Saint Petersburg State University, Universitetsky Pr., 26, 198504 Stary Petergof, Russian Federation
| | - Georgiy B. Shul’pin
- Semenov Institute of Chemical
Physics, Russian Academy of Science, Ulitsa
Kosygina, dom 4, 119991 Moscow, Russian Federation
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Qazi S, Liepold LO, Abedin MJ, Johnson B, Prevelige P, Frank JA, Douglas T. P22 viral capsids as nanocomposite high-relaxivity MRI contrast agents. Mol Pharm 2012; 10:11-7. [PMID: 22656692 DOI: 10.1021/mp300208g] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Attachment of multiple chelated Gd(3+) ions to the interior of bacteriophage P22 viral capsids affords nanoscale MRI contrast agents with extremely high relaxivity values. Highly fenestrated "wiffleball" morphology is unique to P22 and assures water exchange between the environment and interior cavity of the capsid. The cavity of P22 "wiffleball" was functionalized with a branched oligomer comprising multiple DTPA-Gd complexes resulting in an impressive payload of 1,900 Gd(3+) ions inside each 64 nm capsid. High relaxivities of r(1,ionic) = 21.7 mM(-1) s(-1) and r(1,particle) = 41,300 mM(-1) s(-1) at 298 K, 0.65 T (28 MHz) are reported, with r(1)/r(2) ratio of 0.80 and optimized rotational correlation time for this system. Specific design modifications are suggested for future improvements of viral capsid-based MRI contrast agents directed toward clinical translation.
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Affiliation(s)
- Shefah Qazi
- Chemistry and Biochemistry Department and Center for Bio-Inspired Nanomaterials, Montana State University, Bozeman, Montana 59717, United States
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Iki N, Hiro-oka S, Nakamura M, Tanaka T, Hoshino H. Kinetically Stable LnIII Complexes Comprising a Trinuclear Core Sandwiched between Two Thiacalix[4]arene Ligands Self-Assembled in Water (LnIII = NdIII, YbIII). Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201200464] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Bodizs G, Helm L. NMR and Electron Paramagnetic Resonance Studies of [Gd(CH3CN)9]3+ and [Eu(CH3CN)9]2+: Solvation and Solvent Exchange Dynamics in Anhydrous Acetonitrile. Inorg Chem 2012; 51:5881-8. [DOI: 10.1021/ic300478c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Gabriella Bodizs
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut des sciences et ingénierie
chimiques, EPFL-BCH, CH-1015 Lausanne, Switzerland
| | - Lothar Helm
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institut des sciences et ingénierie
chimiques, EPFL-BCH, CH-1015 Lausanne, Switzerland
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Mooney BL, Corrales LR, Clark AE. Novel Analysis of Cation Solvation Using a Graph Theoretic Approach. J Phys Chem B 2012; 116:4263-75. [DOI: 10.1021/jp300193j] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Barbara Logan Mooney
- Department of Chemistry and
Biochemistry, University of Arizona, Tucson,
Arizona 87521, United States
| | - L. Rene Corrales
- Department of Chemistry and
Biochemistry, University of Arizona, Tucson,
Arizona 87521, United States
| | - Aurora E. Clark
- Department of Chemistry, Washington State University, Pullman, Washington 99164,
United States
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Botta M, Tei L. Relaxivity Enhancement in Macromolecular and Nanosized GdIII-Based MRI Contrast Agents. Eur J Inorg Chem 2012. [DOI: 10.1002/ejic.201101305] [Citation(s) in RCA: 159] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Miéville P, Jaccard H, Reviriego F, Tripier R, Helm L. Synthesis, complexation and NMR relaxation properties of Gd3+ complexes of Mes(DO3A)3. Dalton Trans 2011; 40:4260-7. [DOI: 10.1039/c0dt01597k] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Lieb D, Zahl A, Shubina TE, Ivanović-Burmazović I. Water exchange on manganese(III) porphyrins. Mechanistic insights relevant for oxygen evolving complex and superoxide dismutation catalysis. J Am Chem Soc 2010; 132:7282-4. [PMID: 20462177 DOI: 10.1021/ja1014585] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this work the rate constants (k(ex)) and the activation parameters (DeltaH(double dagger), DeltaS(double dagger), and DeltaV(double dagger)) for the water exchange process on Mn(III) centers have experimentally been determined using temperature and pressure dependent (17)O NMR techniques. For the investigations the Mn(III) porphyrin complexes [Mn(III)(TPPS)S(2)](n-) and [Mn(III)(TMpyP)S(2)](n+) (S = H(2)O and/or OH(-)) have been selected due to their high solution stability in a wide pH range, enabling the measurements of water exchange in the case of both diaqua and aqua-hydroxo complexes. We have experimentally demonstrated that the water exchange on Mn(III) porphyrins is a fast process (k(ex) approximately = 10(7) s(-1)) of an I(d) to I mechanism, strongly influenced by a Jahn-Teller effect and as such almost independent of a porphyrin charge and a trans ligand. This is also supported by our DFT calculations which show only a slight difference in an average Mn(III)-OH(2) bond found for a positively charged model porphyrin with protonated pyridine groups (2.446 A) and for a simple model without any substituents on the porphyrin ring (2.437 A). The calculated effective charge on the Mn center, which is significantly lower than its formal +3 charge (ca. +1.5 for diaqua; +1.4 for aqua-hydroxo), also contributes to its substitution lability. The herein presented results are discussed in connection to a possible fast exchanging substrate binding site in photosystem II and corresponding inorganic model complexes, as well as in the context of a possible inner-sphere catalytic pathway for superoxide dismutation on Mn centers.
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Affiliation(s)
- Dominik Lieb
- Friedrich-Alexander-Universität Erlangen-Nürnberg, Department Chemie und Pharmazie, Egerlandstr. 1, 91058 Erlangen, Germany
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42
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Hubbard CD, van Eldik R. Mechanistic information on some inorganic and bioinorganic reactions from volume profile analysis. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2009.09.042] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Viswanathan S, Kovacs Z, Green KN, Ratnakar SJ, Sherry AD. Alternatives to gadolinium-based metal chelates for magnetic resonance imaging. Chem Rev 2010; 110:2960-3018. [PMID: 20397688 PMCID: PMC2874212 DOI: 10.1021/cr900284a] [Citation(s) in RCA: 310] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Subha Viswanathan
- Advanced Imaging Research Center, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390 and Department of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080
| | - Zoltan Kovacs
- Advanced Imaging Research Center, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390 and Department of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080
| | - Kayla N. Green
- Advanced Imaging Research Center, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390 and Department of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080
| | - S. James Ratnakar
- Advanced Imaging Research Center, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390 and Department of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080
| | - A. Dean Sherry
- Advanced Imaging Research Center, UT Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, Texas 75390 and Department of Chemistry, University of Texas at Dallas, 800 West Campbell Road, Richardson, Texas 75080
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Tei L, Benzi M, Kielar F, Botta M, Cavallotti C, Giovenzana G, Aime S. Synthesis and Relaxometric Properties of Gadolinium(III) Complexes of New Triazine-Based Polydentate Ligands. Helv Chim Acta 2009. [DOI: 10.1002/hlca.200900189] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Bruijnincx PCA, Sadler PJ. Controlling Platinum, Ruthenium and Osmium Reactivity for Anticancer Drug Design. ADVANCES IN INORGANIC CHEMISTRY 2009; 61:1-62. [PMID: 21258628 PMCID: PMC3024542 DOI: 10.1016/s0898-8838(09)00201-3] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
| | - Peter J. Sadler
- Department of Chemistry, University of Warwick, Coventry CV4 7AL, United Kingdom
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46
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Design and function of metal complexes as contrast agents in MRI. ADVANCES IN INORGANIC CHEMISTRY 2009. [DOI: 10.1016/s0898-8838(09)00202-5] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Helm L. Ligand exchange and complex formation kinetics studied by NMR exemplified on fac-[(CO)3M(H2O)]+ (M=Mn, Tc, Re). Coord Chem Rev 2008. [DOI: 10.1016/j.ccr.2008.01.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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48
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Maigut J, Meier R, Zahl A, van Eldik R. Effect of Chelate Dynamics on Water Exchange Reactions of Paramagnetic Aminopolycarboxylate Complexes. Inorg Chem 2008; 47:5702-19. [DOI: 10.1021/ic702421z] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Joachim Maigut
- Inorganic Chemistry, Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Roland Meier
- Inorganic Chemistry, Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Achim Zahl
- Inorganic Chemistry, Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
| | - Rudi van Eldik
- Inorganic Chemistry, Department of Chemistry and Pharmacy, University of Erlangen-Nürnberg, Egerlandstrasse 1, 91058 Erlangen, Germany
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Burgess J, Rangel M. Hydroxypyranones, hydroxypyridinones, and their complexes. ADVANCES IN INORGANIC CHEMISTRY 2008. [DOI: 10.1016/s0898-8838(08)00005-6] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
The numerous innovative contributions of Henry Taube to modern inorganic chemistry are briefly reviewed. Highlights include the determination of solvation numbers and lability, elucidation of substitution mechanisms, discovery and documentation of inner-sphere electron transfer, and discovery of the remarkable coordination chemistry of ruthenium and osmium ammine complexes with unsaturated ligands and mixed-valence complexes and their fundamental relationship to intramolecular electron transfer.
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Affiliation(s)
- Carol Creutz
- Chemistry Department, Brookhaven National Laboratory, Upton, NY 11973, USA.
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