151
|
Liu J, Chakraborty S, Hosseinzadeh P, Yu Y, Tian S, Petrik I, Bhagi A, Lu Y. Metalloproteins containing cytochrome, iron-sulfur, or copper redox centers. Chem Rev 2014; 114:4366-469. [PMID: 24758379 PMCID: PMC4002152 DOI: 10.1021/cr400479b] [Citation(s) in RCA: 560] [Impact Index Per Article: 56.0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2013] [Indexed: 02/07/2023]
Affiliation(s)
- Jing Liu
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Saumen Chakraborty
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Parisa Hosseinzadeh
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Yang Yu
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Shiliang Tian
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Igor Petrik
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Ambika Bhagi
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| | - Yi Lu
- Department of Chemistry, Department of Biochemistry, and Center for Biophysics
and Computational
Biology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, United States
| |
Collapse
|
152
|
Zhang N, Samanta SR, Rosen BM, Percec V. Single Electron Transfer in Radical Ion and Radical-Mediated Organic, Materials and Polymer Synthesis. Chem Rev 2014; 114:5848-958. [DOI: 10.1021/cr400689s] [Citation(s) in RCA: 320] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Na Zhang
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Shampa R. Samanta
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| | - Brad M. Rosen
- DuPont Titanium Technologies, Chestnut Run Plaza, Wilmington, Delaware 19805, United States
| | - Virgil Percec
- Roy & Diana Vagelos Laboratories, Department of Chemistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104-6323, United States
| |
Collapse
|
153
|
Weinberger DS, Amin SK N, Mondal KC, Melaimi M, Bertrand G, Stückl AC, Roesky HW, Dittrich B, Demeshko S, Schwederski B, Kaim W, Jerabek P, Frenking G. Isolation of Neutral Mononuclear Copper Complexes Stabilized by Two Cyclic (Alkyl)(amino)carbenes. J Am Chem Soc 2014; 136:6235-8. [DOI: 10.1021/ja502521b] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- David S. Weinberger
- UCSD-CNRS
Joint Research Chemistry Laboratory (UMI 3555), Department of Chemistry
and Biochemistry, University of California−San Diego, La Jolla, California 92093-0343, United States
| | - Nurul Amin SK
- Institut
für Anorganische Chemie, Georg-August-Universität, Tammannstraße 4, 37077 Göttingen, Germany
| | - Kartik Chandra Mondal
- Institut
für Anorganische Chemie, Georg-August-Universität, Tammannstraße 4, 37077 Göttingen, Germany
| | - Mohand Melaimi
- UCSD-CNRS
Joint Research Chemistry Laboratory (UMI 3555), Department of Chemistry
and Biochemistry, University of California−San Diego, La Jolla, California 92093-0343, United States
| | - Guy Bertrand
- UCSD-CNRS
Joint Research Chemistry Laboratory (UMI 3555), Department of Chemistry
and Biochemistry, University of California−San Diego, La Jolla, California 92093-0343, United States
| | - A. Claudia Stückl
- Institut
für Anorganische Chemie, Georg-August-Universität, Tammannstraße 4, 37077 Göttingen, Germany
| | - Herbert W. Roesky
- Institut
für Anorganische Chemie, Georg-August-Universität, Tammannstraße 4, 37077 Göttingen, Germany
| | - Birger Dittrich
- Institut
für Anorganische Chemie, Georg-August-Universität, Tammannstraße 4, 37077 Göttingen, Germany
- Institut
für Anorganische und Angewandte Chemie, Universität Hamburg, Martin-Luther-King-Platz 6, Raum AC 15c (Erdgeschoss), 20146 Hamburg, Germany
| | - Serhiy Demeshko
- Institut
für Anorganische Chemie, Georg-August-Universität, Tammannstraße 4, 37077 Göttingen, Germany
| | - Brigitte Schwederski
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, 70569 Stuttgart, Germany
| | - Wolfgang Kaim
- Institut
für Anorganische Chemie, Universität Stuttgart, Pfaffenwaldring
55, 70569 Stuttgart, Germany
| | - Paul Jerabek
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35032 Marburg, Germany
| | - Gernot Frenking
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Straße, 35032 Marburg, Germany
| |
Collapse
|
154
|
Haldón E, Delgado-Rebollo M, Prieto A, Alvarez E, Maya C, Nicasio MC, Pérez PJ. Synthesis, Structural Characterization, Reactivity, and Catalytic Properties of Copper(I) Complexes with a Series of Tetradentate Tripodal Tris(pyrazolylmethyl)amine Ligands. Inorg Chem 2014; 53:4192-201. [DOI: 10.1021/ic500311y] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Estela Haldón
- Laboratorio de Catálisis Homogénea, Unidad Asociada al CSIC, CIQSO-Centro de Investigación en Química Sostenible and Departamento de Química y Ciencias de los Materiales, Universidad de Huelva , Campus de El Carmen s/n, 21007 Huelva, Spain
| | | | | | | | | | | | | |
Collapse
|
155
|
Miecznikowski JR, Lynn MA, Jasinski JP, Reinheimer E, Bak DW, Pati M, Butrick EE, Drozdoski AER, Archer KA, Villa CE, Lemons EG, Powers E, Siu M, Gomes CD, Morio KN. Synthesis, characterization, and computational study of three-coordinate SNS-copper(I) complexes based on bis-thione precursors. J COORD CHEM 2014. [DOI: 10.1080/00958972.2014.883070] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
| | - Matthew A. Lynn
- Department of Science and Mathematics, National Technical Institute for the Deaf, Rochester Institute of Technology, Rochester, NY, USA
| | | | - Eric Reinheimer
- Department of Chemistry, California State Polytechnic University Pomona, Pomona, CA, USA
| | - Daniel W. Bak
- Department of Chemistry and Molecular Biology, Cell Biology, and Biochemistry, Boston University, Boston, MA, USA
| | - Mekhala Pati
- Department of Chemistry and Molecular Biology, Cell Biology, and Biochemistry, Boston University, Boston, MA, USA
| | - Elizabeth E. Butrick
- Department of Chemistry and Biochemistry, Fairfield University, Fairfield, CT, USA
| | | | - Kerry A. Archer
- Department of Chemistry and Biochemistry, Fairfield University, Fairfield, CT, USA
| | - Christine E. Villa
- Department of Chemistry and Biochemistry, Fairfield University, Fairfield, CT, USA
| | - Elise G. Lemons
- Department of Chemistry and Biochemistry, Fairfield University, Fairfield, CT, USA
| | - Erin Powers
- Department of Chemistry and Biochemistry, Fairfield University, Fairfield, CT, USA
| | - Margaret Siu
- Department of Chemistry and Biochemistry, Fairfield University, Fairfield, CT, USA
| | - Camile D. Gomes
- Department of Chemistry and Biochemistry, Fairfield University, Fairfield, CT, USA
| | - Kaitlyn N. Morio
- Department of Chemistry and Biochemistry, Fairfield University, Fairfield, CT, USA
| |
Collapse
|
156
|
Affiliation(s)
- Jean-Noël Rebilly
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, PRES Sorbonne Paris Cité, Université Paris Descartes, 45 rue des Saints Pères, 75006 Paris, France
| | - Olivia Reinaud
- Laboratoire de Chimie et Biochimie Pharmacologiques et Toxicologiques, CNRS UMR 8601, PRES Sorbonne Paris Cité, Université Paris Descartes, 45 rue des Saints Pères, 75006 Paris, France
| |
Collapse
|
157
|
Porras Gutiérrez AG, Zeitouny J, Gomila A, Douziech B, Cosquer N, Conan F, Reinaud O, Hapiot P, Le Mest Y, Lagrost C, Le Poul N. Insights into water coordination associated with the CuII/CuI electron transfer at a biomimetic Cu centre. Dalton Trans 2014; 43:6436-45. [DOI: 10.1039/c3dt53548g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
The coordination chemistry of an aqua Cu complex was investigated in non-coordinating solvents and in ionic liquids.
Collapse
|
158
|
Benkhellat Z, Allali M, Beley M, Wenger E, Bernard M, Parizel N, Selmeczi K, Joly JP. Click synthesis of symmetric bis-triazol ligands and full characterisation of their copper(ii)-complexes. NEW J CHEM 2014. [DOI: 10.1039/c3nj00570d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
159
|
Yu F, Penner-Hahn JE, Pecoraro VL. De novo-designed metallopeptides with type 2 copper centers: modulation of reduction potentials and nitrite reductase activities. J Am Chem Soc 2013; 135:18096-107. [PMID: 24182361 DOI: 10.1021/ja406648n] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Enzymatic reactions involving redox processes are highly sensitive to the local electrostatic environment. Despite considerable effort, the complex interactions among different influential factors in native proteins impede progress toward complete understanding of the structure-function relationship. Of particular interest is the type 2 copper center Cu(His)3, which may act as an electron transfer center in peptidylglycine α-hydroxylating monooxygenase (PHM) or a catalytic center in copper nitrite reductase (CuNiR). A de novo design strategy is used to probe the effect of modifying charged amino acid residues around, but not directly bound to, a Cu(His)3 center embedded in three-stranded coiled coils (TRI-H)3 [TRI-H = Ac-G WKALEEK LKALEEK LKALEEK HKALEEK G-NH2]. Specifically, the peptide TRI-EH (=TRI-HK22E) alters an important lysine to glutamate just above the copper binding center. With a series of TRI-EH peptides mutated below the metal center, we use a variety of spectroscopies (EPR, UV-vis, XAS) to show a direct impact on the protonation equilibria, copper binding affinities, reduction potentials, and nitrite reductase activities of these copper-peptide complexes. The potentials at a specific pH vary by 100 mV, and the nitrite reductase activities range over a factor of 4 in rates. We also observe that the affinities, potentials, and catalytic activities are strongly influenced by the pH conditions (pH 5.8-7.4). In general, Cu(II) affinities for the peptides are diminished at low pH values. The interplay among these factors can lead to a 200 mV shift in reduction potential across these peptides, which is determined by the pH-dependent affinities of copper in both oxidation states. This study illustrates the strength of de novo protein design in elucidating the influence of ionizable residues on a particular redox system, an important step toward understanding the factors that govern the properties of this metalloenzyme with a goal of eventually improving the catalytic activity.
Collapse
Affiliation(s)
- Fangting Yu
- Department of Chemistry, University of Michigan , 930 North University Avenue, Ann Arbor, Michigan 48109-1055, United States
| | | | | |
Collapse
|
160
|
Hoffmann A, Binder S, Jesser A, Haase R, Flörke U, Gnida M, Salomone Stagni M, Meyer-Klaucke W, Lebsanft B, Grünig LE, Schneider S, Hashemi M, Goos A, Wetzel A, Rübhausen M, Herres-Pawlis S. Den entatischen Zustand im Griff - ein Duo von Kupfer-Komplexen. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201306061] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
161
|
Hoffmann A, Binder S, Jesser A, Haase R, Flörke U, Gnida M, Salomone Stagni M, Meyer-Klaucke W, Lebsanft B, Grünig LE, Schneider S, Hashemi M, Goos A, Wetzel A, Rübhausen M, Herres-Pawlis S. Catching an Entatic State-A Pair of Copper Complexes. Angew Chem Int Ed Engl 2013; 53:299-304. [DOI: 10.1002/anie.201306061] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 08/25/2013] [Indexed: 11/08/2022]
|
162
|
Isse AA, Bortolamei N, De Paoli P, Gennaro A. On the mechanism of activation of copper-catalyzed atom transfer radical polymerization. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.04.132] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
163
|
Jesser A, Rohrmüller M, Schmidt WG, Herres-Pawlis S. Geometrical and optical benchmarking of copper guanidine-quinoline complexes: Insights from TD-DFT and many-body perturbation theory†. J Comput Chem 2013; 35:1-17. [DOI: 10.1002/jcc.23449] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2013] [Revised: 08/19/2013] [Accepted: 08/21/2013] [Indexed: 02/04/2023]
Affiliation(s)
- Anton Jesser
- Ludwig-Maximilians-Universität München, Department Chemie; Butenandtstr. 5-13 81377 München Germany
| | - Martin Rohrmüller
- Universität Paderborn, Department Physik Lehrstuhl für Theoretische Physik; Warburger Str. 100, 33095 Paderborn Germany
| | - Wolf Gero Schmidt
- Universität Paderborn, Department Physik Lehrstuhl für Theoretische Physik; Warburger Str. 100, 33095 Paderborn Germany
| | - Sonja Herres-Pawlis
- Ludwig-Maximilians-Universität München, Department Chemie; Butenandtstr. 5-13 81377 München Germany
| |
Collapse
|
164
|
Fulda B, Voegelin A, Maurer F, Christl I, Kretzschmar R. Copper redox transformation and complexation by reduced and oxidized soil humic acid. 1. X-ray absorption spectroscopy study. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2013; 47:10903-11. [PMID: 24050649 DOI: 10.1021/es4024089] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Natural organic matter (NOM) exerts strong influence on copper speciation and bioavailability in soils and aquatic systems. In redox-dynamic environments, electron transfer reactions between copper and redox-active moieties of NOM may trigger Cu(I) and Cu(0) formation. To date, little is known about Cu-NOM redox interactions and Cu(I) binding to NOM. Here, we present X-ray absorption spectroscopy results on copper redox transformations upon addition of Cu(II) or Cu(I) to untreated and electrochemically reduced soil humic acid (HA) under oxic and anoxic conditions. Both untreated and reduced HA mediated copper redox transformations. Under anoxic conditions, Cu(II) and Cu(I) added to reduced HA were primarily complexed and thereby stabilized as Cu(I)-HA at low loadings, whereas high copper loadings resulted in the additional formation of Cu(0) nanoparticles (16-64% of total copper). Cu(I) bound to HA was predominantly 2-fold coordinated and to a lower extent 3- to 4-fold coordinated, with a contribution of at least one nitrogen and/or sulfur ligand group. Under oxic conditions, Cu(II)-HA complexes prevailed, but smaller fractions of copper were also stabilized as Cu(I)-HA in a 3- to 4-fold coordination. Our results show that Cu-HA redox interactions are strongly affected by binding of Cu(II) and Cu(I) to HA and that HA contributes to the stabilization of Cu(I) against disproportionation.
Collapse
Affiliation(s)
- Beate Fulda
- Institute of Biogeochemistry and Pollutant Dynamics, ETH Zurich , CHN, CH-8092 Zurich, Switzerland
| | | | | | | | | |
Collapse
|
165
|
Cherney MM, Junior CC, Bergquist BB, Bowler BE. Dynamics of the His79-heme alkaline transition of yeast iso-1-cytochrome c probed by conformationally gated electron transfer with Co(II)bis(terpyridine). J Am Chem Soc 2013; 135:12772-82. [PMID: 23899348 PMCID: PMC3856690 DOI: 10.1021/ja405725f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Alkaline conformers of cytochrome c may be involved in both its electron transport and apoptotic functions. We use cobalt(II)bis(terpyridine), Co(terpy)2(2+), as a reagent for conformationally gated electron-transfer (gated ET) experiments to study the alkaline conformational transition of K79H variants of yeast iso-1-cytochrome c expressed in Escherichia coli , WT*K79H, with alanine at position 72 and Saccharomyces cerevisiae , yK79H, with trimethyllysine (Tml) at position 72. Co(terpy)2(2+) is well-suited to the 100 ms to 1 s time scale of the His79-mediated alkaline conformational transition of these variants. Reduction of the His79-heme alkaline conformer by Co(terpy)2(2+) occurs primarily by gated ET, which involves conversion to the native state followed by reduction, with a small fraction of the His79-heme alkaline conformer directly reduced by Co(terpy)2(2+). The gated ET experiments show that the mechanism of formation of the His79-heme alkaline conformer involves only two ionizable groups. In previous work, we showed that the mechanism of the His73-mediated alkaline conformational transition requires three ionizable groups. Thus, the mechanism of heme crevice opening depends upon the position of the ligand mediating the process. The microscopic rate constants provided by gated ET studies show that mutation of Tml72 (yK79H variant) in the heme crevice loop to Ala72 (WT*K79H variant) affects the dynamics of heme crevice opening through a small destabilization of both the native conformer and the transition state relative to the His79-heme alkaline conformer. Previous pH jump data had indicated that the Tml72→Ala mutation primarily stabilized the transition state for the His79-mediated alkaline conformational transition.
Collapse
Affiliation(s)
| | - Carolyn C. Junior
- Department of Chemistry & Biochemistry, Center for Biomolecular Structure and Dynamics, University of Montana, Missoula, Montana 59812
| | - Bryan B. Bergquist
- Department of Chemistry & Biochemistry, Center for Biomolecular Structure and Dynamics, University of Montana, Missoula, Montana 59812
| | - Bruce E. Bowler
- Department of Chemistry & Biochemistry, Center for Biomolecular Structure and Dynamics, University of Montana, Missoula, Montana 59812
| |
Collapse
|
166
|
Gout J, Višnjevac A, Rat S, Bistri O, Le Poul N, Le Mest Y, Reinaud O. Bowl versus Funnel Supramolecular Concept for CuIComplexes within the Biomimetic Tris(imidazole) Core. Eur J Inorg Chem 2013. [DOI: 10.1002/ejic.201300733] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
167
|
Nishikawa M, Takara Y, Hattori Y, Nomoto K, Kusamoto T, Kume S, Nishihara H. Structural modification on copper(I)-pyridylpyrimidine complexes for modulation of rotational dynamics, redox properties, and phototriggered isomerization. Inorg Chem 2013; 52:8962-70. [PMID: 23883176 DOI: 10.1021/ic4011295] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The redox properties of copper pyridylpyrimidine complexes, which undergo linkage isomerism based on pyrimidine ring rotation, were compared under different coordination environments. A newly synthesized compound, [Cu(Mepypm)(L(Mes))]BF4 (1·BF4, Mepypm = 4-methyl-2-(2'-pyridyl)pyrimidine, L(Mes) = 2,9-dimesityl-1,10-phenanthroline) was compared with previously reported complexes of [Cu(MepmMepy)(L(Mes))]BF4 (2·BF4, MepmMepy = 4-methyl-2-(6'-methyl-2'-pyridyl)pyrimidine), Cu(Mepypm)(DPEphos)]BF4 (3·BF4, DPEphos = bis[2-(diphenylphosphino)phenyl]ether), [Cu(Mepypm)(L(Anth))]BF4 (4·BF4, L(Anth) = 2,9-bis(9-anthryl)-1,10-phenanthroline), and [Cu(Mepypm)(L(Macro))]BF4 (5·BF4). Isomer ratios, isomerization dynamics, redox properties, and photoelectron conversion functions varied with the coordination structure. Methyl substituents on the 6-position of the pyridine moiety increased steric repulsion and contributed to quicker rotation, enhanced photoluminescence, and increased photodriven rotational isomerization.
Collapse
Affiliation(s)
- Michihiro Nishikawa
- Department of Chemistry, School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | | | | | | | | | | | | |
Collapse
|
168
|
Isomorphic deactivation of a Pseudomonas aeruginosa oxidoreductase: The crystal structure of Ag(I) metallated azurin at 1.7 Å. J Inorg Biochem 2013; 128:11-6. [PMID: 23911566 DOI: 10.1016/j.jinorgbio.2013.07.011] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Revised: 07/05/2013] [Accepted: 07/08/2013] [Indexed: 11/21/2022]
Abstract
Multiple biophysical methods demonstrate that silver effectively metallates Pseudomonas aeruginosa apo-azurin in solution. X-ray crystallography of the silver-modified protein reveals that silver binds to azurin at the traditional copper mediated active site with nearly identical geometry. Cyclic voltammetry indicates that the silver adduct is redox inert. Our results suggest that a potential mechanism for the microbial toxicity of silver is the deactivation of copper oxidoreductases by the effective binding and structural mimicry by silver without the corresponding function.
Collapse
|
169
|
Comba P, Morgen M, Wadepohl H. Tuning of the Properties of Transition-Metal Bispidine Complexes by Variation of the Basicity of the Aromatic Donor Groups. Inorg Chem 2013; 52:6481-501. [DOI: 10.1021/ic4004214] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Peter Comba
- Anorganisch-Chemisches Institut, Universität Heidelberg, INF 270, D-69120 Heidelberg, Germany
| | - Michael Morgen
- Anorganisch-Chemisches Institut, Universität Heidelberg, INF 270, D-69120 Heidelberg, Germany
| | - Hubert Wadepohl
- Anorganisch-Chemisches Institut, Universität Heidelberg, INF 270, D-69120 Heidelberg, Germany
| |
Collapse
|
170
|
Comba P, Dovalil N, Haberhauer G, Kowski K, Mehrkens N, Westphal M. Copper Solution Chemistry of Cyclic Pseudo-Octapeptides. Z Anorg Allg Chem 2013. [DOI: 10.1002/zaac.201300079] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
171
|
Coordination programming of photofunctional molecules. Molecules 2013; 18:4091-119. [PMID: 23563859 PMCID: PMC6269798 DOI: 10.3390/molecules18044091] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2013] [Revised: 03/15/2013] [Accepted: 03/27/2013] [Indexed: 11/16/2022] Open
Abstract
Our recent achievements relating to photofunctional molecules are addressed. Section 1 discloses a new concept of photoisomerization. Pyridylpyrimidine-copper complexes undergo a ring inversion that can be modulated by the redox state of the copper center. In combination with an intermolecular photoelectron transfer (PET) initiated by the metal-to-ligand charge transfer (MLCT) transition of the Cu(I) state, we realize photonic regulation of the ring inversion. Section 2 reports on the first examples of heteroleptic bis(dipyrrinato)zinc(II) complexes. Conventional homoleptic bis(dipyrrinato)zinc(II) complexes suffered from low fluorescence quantum yields, whereas the heteroleptic ones feature bright fluorescence even in polar solvents. Section 3 describes our new findings on Pechmann dye, which was first synthesized in 1882. New synthetic procedures for Pechmann dye using dimethyl bis(arylethynyl)fumarate as a starting material gives rise to its new structural isomer. We also demonstrate potentiality of a donor-acceptor-donor type of Pechmann dye in organic electronics.
Collapse
|
172
|
Martínez-Alanis PR, Sánchez Eguía BN, Ugalde-Saldívar VM, Regla I, Demare P, Aullón G, Castillo I. Copper versus thioether-centered oxidation: mechanistic insights into the non-innocent redox behavior of tripodal benzimidazolylaminothioether ligands. Chemistry 2013; 19:6067-79. [PMID: 23495176 DOI: 10.1002/chem.201203498] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Indexed: 11/11/2022]
Abstract
A series of Cu(+) complexes with ligands that feature varying numbers of benzimidazole/thioether donors and methylene or ethylene linkers between the central nitrogen atom and the thioether sulfur atoms have been spectroscopically and electrochemically characterized. Cyclic voltammetry measurements indicated that the highest Cu(2+)/Cu(+) redox potentials correspond to sulfur-rich coordination environments, with values decreasing as the thioether donors are replaced by nitrogen-donating benzimidazoles. Both Cu(2+) and Cu(+) complexes were studied by DFT. Their electronic properties were determined by analyzing their frontier orbitals, relative energies, and the contributions to the orbitals involved in redox processes, which revealed that the HOMOs of the more sulfur-rich copper complexes, particularly those with methylene linkers (-N-CH2-S-), show significant aromatic thioether character. Thus, the theoretically predicted initial oxidation at the sulfur atom of the methylene-bridged ligands agrees with the experimentally determined oxidation waves in the voltammograms of the NS3- and N2S2-type ligands as being ligand-based, as opposed to the copper-based processes of the ethylene-bridged Cu(+) complexes. The electrochemical and theoretical results are consistent with our previously reported mechanistic proposal for Cu(2+)-promoted oxidative C-S bond cleavage, which in this work resulted in the isolation and complete characterization (including by X-ray crystallography) of the decomposition products of two ligands employed, further supporting the novel reactivity pathway invoked. The combined results raise the possibility that the reactions of copper-thioether complexes in chemical and biochemical systems occur with redox participation of the sulfur atom.
Collapse
Affiliation(s)
- Paulina R Martínez-Alanis
- Instituto de Química, Universidad Nacional Autónoma de México, Circuito Exterior, CU, México DF, 04510, México
| | | | | | | | | | | | | |
Collapse
|
173
|
|
174
|
Das D, Lee YM, Ohkubo K, Nam W, Karlin KD, Fukuzumi S. Temperature-independent catalytic two-electron reduction of dioxygen by ferrocenes with a copper(II) tris[2-(2-pyridyl)ethyl]amine catalyst in the presence of perchloric acid. J Am Chem Soc 2013; 135:2825-34. [PMID: 23394287 DOI: 10.1021/ja312523u] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Selective two-electron plus two-proton (2e(-)/2H(+)) reduction of O(2) to hydrogen peroxide by ferrocene (Fc) or 1,1'-dimethylferrocene (Me(2)Fc) in the presence of perchloric acid is catalyzed efficiently by a mononuclear copper(II) complex, [Cu(II)(tepa)](2+) (1; tepa = tris[2-(2-pyridyl)ethyl]amine) in acetone. The E(1/2) value for [Cu(II)(tepa)](2+) as measured by cyclic voltammetry is 0.07 V vs Fc/Fc(+) in acetone, being significantly positive, which makes it possible to use relatively weak one-electron reductants such as Fc and Me(2)Fc for the overall two-electron reduction of O(2). Fast electron transfer from Fc or Me(2)Fc to 1 affords the corresponding Cu(I) complex [Cu(I)(tepa)](+) (2), which reacts at low temperature (193 K) with O(2), however only in the presence of HClO(4), to afford the hydroperoxo complex [Cu(II)(tepa)(OOH)](+) (3). A detailed kinetic study on the homogeneous catalytic system reveals the rate-determining step to be the O(2)-binding process in the presence of HClO(4) at lower temperature as well as at room temperature. The O(2)-binding kinetics in the presence of HClO(4) were studied, demonstrating that the rate of formation of the hydroperoxo complex 3 as well as the overall catalytic reaction remained virtually the same with changing temperature. The apparent lack of activation energy for the catalytic two-electron reduction of O(2) is shown to result from the existence of a pre-equilibrium between 2 and O(2) prior to the formation of the hydroperoxo complex 3. No further reduction of [Cu(II)(tepa)(OOH)](+) (3) by Fc or Me(2)Fc occurred, and instead 3 is protonated by HClO(4) to yield H(2)O(2) accompanied by regeneration of 1, thus completing the catalytic cycle for the two-electron reduction of O(2) by Fc or Me(2)Fc.
Collapse
Affiliation(s)
- Dipanwita Das
- Department of Bioinspired Science, Ewha Womans University, Seoul 120-750, Korea
| | | | | | | | | | | |
Collapse
|
175
|
DFT and experimental study of the structure and vibrational spectra of 2-(benzylthio)-N-{pyridinylmethylidene}anilines. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.08.026] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
176
|
Pratt HD, Leonard JC, Steele LAM, Staiger CL, Anderson TM. Copper ionic liquids: Examining the role of the anion in determining physical and electrochemical properties. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2012.10.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
177
|
Mara MW, Jackson NE, Huang J, Stickrath AB, Zhang X, Gothard NA, Ratner MA, Chen LX. Effects of electronic and nuclear interactions on the excited-state properties and structural dynamics of copper(I) diimine complexes. J Phys Chem B 2013; 117:1921-31. [PMID: 23323679 DOI: 10.1021/jp311643t] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The effects of structural constraints on the metal-to-ligand charge transfer (MLCT) excited state structural dynamics of cuprous bis-2,9-diphenyl-phenanthroline ([Cu(I)(dpp)(2)](+)) in both coordinating acetonitrile and noncoordinating toluene were studied using X-ray transient absorption (XTA) spectroscopy and density functional theory (DFT) calculations. The phenyl groups attached to the phenanthroline ligands not only effectively shield the Cu(I) center from solvent molecules, but also force a flattened tetrahedral coordination geometry of the Cu(I) center. Consequently, the MLCT state lifetime in [Cu(I)(dpp)(2)](+) is solvent-independent, unlike the previously studied 2,9-methyl substituted bis-phenanthroline Cu(I) complex. The MLCT state of [Cu(I)(dpp)(2)](+) still undergoes a "pseudo Jahn-Teller distortion," with the angle between the two phenanthroline ligand planes decreased further by 7°. The XTA results indicate that, in the MLCT excited state of [Cu(I)(dpp)(2)](+), the phenyls at the 2, 9 positions of the phenanthroline rotate, breaking the π-π interaction with the phenanthroline ligands without ever rotating in-plane with the phenanthroline ligands. Hence, the transferred electron density from the Cu(I) center is localized on the phenanthroline moiety with no charge density present on the phenyl rings. The insight about the effect of the structural constraints on the MLCT state properties will guide the design of Cu(I) diimine complexes with suitable excited-state properties to function as earth-abundant dye sensitizers for solar electricity generation.
Collapse
Affiliation(s)
- Michael W Mara
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208-3113, USA
| | | | | | | | | | | | | | | |
Collapse
|
178
|
Bai SQ, Jiang L, Zuo JL, Hor TSA. Hybrid NS ligands supported Cu(i)/(ii) complexes for azide–alkyne cycloaddition reactions. Dalton Trans 2013; 42:11319-26. [DOI: 10.1039/c3dt50247c] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
179
|
El Sayed Moussa M, Friess F, Shen W, Hissler M, Réau R, Lescop C. Syntheses of CuI polymetallic assemblies from reaction of ligands bearing the 2,5-bis(2-pyridyl)phosphole fragment with CuII precursors. Chem Commun (Camb) 2013; 49:6158-60. [DOI: 10.1039/c3cc42955e] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
180
|
Knight JC, Wuest M, Saad FA, Wang M, Chapman DW, Jans HS, Lapi SE, Kariuki BM, Amoroso AJ, Wuest F. Synthesis, characterisation and evaluation of a novel copper-64 complex with selective uptake in EMT-6 cells under hypoxic conditions. Dalton Trans 2013; 42:12005-14. [DOI: 10.1039/c3dt50960e] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
181
|
Nishikawa M, Kume S, Nishihara H. Stimuli-responsive pyrimidine ring rotation in copper complexes for switching their physical properties. Phys Chem Chem Phys 2013; 15:10549-65. [DOI: 10.1039/c3cp44710c] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
182
|
Jozwiuk A, Wang Z, Powell DR, Houser RP. Copper(II) complexes of symmetric and asymmetric bis(imine) ligands: Tuning the Cu(I)/Cu(II) redox couple. Inorganica Chim Acta 2013. [DOI: 10.1016/j.ica.2012.08.026] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
|
183
|
Verani CN, Shanmugam R, Xavier FR, Allard MM, Kpogo KK. Electronic and interfacial behavior of gemini metallosurfactants with copper(ii)/pseudohalide cascade cores. Dalton Trans 2013; 42:15296-306. [DOI: 10.1039/c3dt50788b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
184
|
Nishikawa M, Nomoto K, Kume S, Nishihara H. Solvated-Ion-Pairing-Sensitive Molecular Bistability Based on Copper(I)-Coordinated Pyrimidine Ring Rotation. Inorg Chem 2012; 52:369-80. [DOI: 10.1021/ic302141z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Michihiro Nishikawa
- Department of Chemistry, School
of Science, The University of Tokyo, 7-3-1
Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Kuniharu Nomoto
- Department of Chemistry, School
of Science, The University of Tokyo, 7-3-1
Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Shoko Kume
- Department of Chemistry, School
of Science, The University of Tokyo, 7-3-1
Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | - Hiroshi Nishihara
- Department of Chemistry, School
of Science, The University of Tokyo, 7-3-1
Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| |
Collapse
|
185
|
Reactions of copper macrocycles with antioxidants and HOCl: potential for biological redox sensing. Biometals 2012; 26:85-96. [DOI: 10.1007/s10534-012-9596-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2012] [Accepted: 11/02/2012] [Indexed: 11/27/2022]
|
186
|
Tierney DL. Jahn-Teller dynamics in a series of high-symmetry Co(II) chelates determine paramagnetic relaxation enhancements. J Phys Chem A 2012; 116:10959-72. [PMID: 23095055 DOI: 10.1021/jp309245e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
NMR paramagnetic relaxation enhancements (PREs) of a series of structurally characterized, trigonal bis-trispyrazolylborate (Tp) chelates of high-spin Co(II), spanning 100-850 MHz in field, are reported. Prior knowledge of the metal-nucleus distances allows numerical extraction of position-dependent electron spin relaxation rates (τ(c)(-1)) from direct measurement of the individual PREs of the four symmetry distinct protons in Co(Tp)(2), using available closed-form expressions. The data for this electronically complex system where spin-orbit coupling defines the ground state electronic structure are analyzed in terms of the Solomon-Bloembergen-Morgan (SBM) relations, as well as available zero-field splitting limit theories. A simple angular correction is shown to be sufficient to reconcile the individual τ(c)(T) data for the four classes of protons. The data identify a previously unrecognized dynamic Jahn-Teller effect in these historically important complexes, with a barrier of ~230 cm(-1), pointing to a level of dynamics in trispyrazolylborate chemistry that has not been described before, and further show that it is the Jahn-Teller that is responsible for the PREs in fluid solution. A field-dependent component is also identified for the two protons nearest g(//), which is suggested to arise due to Zeeman mixing of excited state character into the ground level.
Collapse
Affiliation(s)
- David L Tierney
- Department of Chemistry and Chemical Biology, The University of New Mexico, Albuquerque, New Mexico 87131, United States.
| |
Collapse
|
187
|
Faller P, Hureau C, Dorlet P, Hellwig P, Coppel Y, Collin F, Alies B. Methods and techniques to study the bioinorganic chemistry of metal–peptide complexes linked to neurodegenerative diseases. Coord Chem Rev 2012. [DOI: 10.1016/j.ccr.2012.03.015] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
|
188
|
Turner SA, Remillard ZD, Gijima DT, Gao E, Pike RD, Goh C. Syntheses and Structures of Closely Related Copper(I) Complexes of Tridentate (2-Pyridylmethyl)imine and (2-Pyridylmethyl)amine Ligands and Their Use in Mediating Atom Transfer Radical Polymerizations. Inorg Chem 2012; 51:10762-73. [DOI: 10.1021/ic3011585] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sara A Turner
- Department of Chemistry, Williams College, Williamstown, Massachusetts 01267, USA
| | | | | | | | | | | |
Collapse
|
189
|
Nishikawa M, Nomoto K, Kume S, Nishihara H. Reversible Copper(II)/(I) Electrochemical Potential Switching Driven by Visible Light-Induced Coordinated Ring Rotation. J Am Chem Soc 2012; 134:10543-53. [DOI: 10.1021/ja3028873] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michihiro Nishikawa
- Department of Chemistry,
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
| | - Kuniharu Nomoto
- Department of Chemistry,
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
| | - Shoko Kume
- Department of Chemistry,
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
| | - Hiroshi Nishihara
- Department of Chemistry,
School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo
113-0033, Japan
| |
Collapse
|
190
|
Zhang H, Ji Z, Xia T, Meng H, Low-Kam C, Liu R, Pokhrel S, Lin S, Wang X, Liao YP, Wang M, Li L, Rallo R, Damoiseaux R, Telesca D, Mädler L, Cohen Y, Zink JI, Nel AE. Use of metal oxide nanoparticle band gap to develop a predictive paradigm for oxidative stress and acute pulmonary inflammation. ACS NANO 2012; 6:4349-68. [PMID: 22502734 PMCID: PMC4139054 DOI: 10.1021/nn3010087] [Citation(s) in RCA: 523] [Impact Index Per Article: 43.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
We demonstrate for 24 metal oxide (MOx) nanoparticles that it is possible to use conduction band energy levels to delineate their toxicological potential at cellular and whole animal levels. Among the materials, the overlap of conduction band energy (E(c)) levels with the cellular redox potential (-4.12 to -4.84 eV) was strongly correlated to the ability of Co(3)O(4), Cr(2)O(3), Ni(2)O(3), Mn(2)O(3), and CoO nanoparticles to induce oxygen radicals, oxidative stress, and inflammation. This outcome is premised on permissible electron transfers from the biological redox couples that maintain the cellular redox equilibrium to the conduction band of the semiconductor particles. Both single-parameter cytotoxic as well as multi-parameter oxidative stress assays in cells showed excellent correlation to the generation of acute neutrophilic inflammation and cytokine responses in the lungs of C57 BL/6 mice. Co(3)O(4), Ni(2)O(3), Mn(2)O(3), and CoO nanoparticles could also oxidize cytochrome c as a representative redox couple involved in redox homeostasis. While CuO and ZnO generated oxidative stress and acute pulmonary inflammation that is not predicted by E(c) levels, the adverse biological effects of these materials could be explained by their solubility, as demonstrated by ICP-MS analysis. These results demonstrate that it is possible to predict the toxicity of a large series of MOx nanoparticles in the lung premised on semiconductor properties and an integrated in vitro/in vivo hazard ranking model premised on oxidative stress. This establishes a robust platform for modeling of MOx structure-activity relationships based on band gap energy levels and particle dissolution. This predictive toxicological paradigm is also of considerable importance for regulatory decision-making about this important class of engineered nanomaterials.
Collapse
Affiliation(s)
- Haiyuan Zhang
- California NanoSystems Institute, University of California, Los Angeles, California
| | - Zhaoxia Ji
- California NanoSystems Institute, University of California, Los Angeles, California
| | - Tian Xia
- Division of NanoMedicine, Department of Medicine, University of California, Los Angeles, California
| | - Huan Meng
- Division of NanoMedicine, Department of Medicine, University of California, Los Angeles, California
| | - Cecile Low-Kam
- Department of Biostatistics, University of California, Los Angeles, California
| | - Rong Liu
- Department of Chemical & Biomolecular Engineering, University of California, Los Angeles, California
| | - Suman Pokhrel
- IWT Foundation Institute of Materials Science, Department of Production Engineering, University of Bremen, Germany
| | - Sijie Lin
- California NanoSystems Institute, University of California, Los Angeles, California
| | - Xiang Wang
- California NanoSystems Institute, University of California, Los Angeles, California
| | - Yu-Pei Liao
- Division of NanoMedicine, Department of Medicine, University of California, Los Angeles, California
| | - Meiying Wang
- Division of NanoMedicine, Department of Medicine, University of California, Los Angeles, California
| | - Linjiang Li
- California NanoSystems Institute, University of California, Los Angeles, California
| | - Robert Rallo
- Departament d’Enginyeria Informatica i Matematiques, Universitat Rovira i Virgili, Av. Paisos Catalans 26, 43007 Tarragona, Catalunya, Spain
| | - Robert Damoiseaux
- California NanoSystems Institute, University of California, Los Angeles, California
- Molecular Shared Screening Resources, University of California, Los Angeles, California
| | - Donatello Telesca
- Department of Biostatistics, University of California, Los Angeles, California
| | - Lutz Mädler
- IWT Foundation Institute of Materials Science, Department of Production Engineering, University of Bremen, Germany
| | - Yoram Cohen
- Department of Chemical & Biomolecular Engineering, University of California, Los Angeles, California
| | - Jeffrey I. Zink
- Department of Chemistry & Biochemistry, University of California, Los Angeles, California
| | - Andre E. Nel
- California NanoSystems Institute, University of California, Los Angeles, California
- Division of NanoMedicine, Department of Medicine, University of California, Los Angeles, California
- Corresponding Author: Andre Nel, M.D., Department of Medicine, Division of NanoMedicine, UCLA School of Medicine, 52-175 CHS, 10833 Le Conte Ave, Los Angeles, CA 90095-1680. Tel: (310) 825-6620, Fax: (310) 206-8107,
| |
Collapse
|
191
|
Matyjaszewski K. Atom Transfer Radical Polymerization (ATRP): Current Status and Future Perspectives. Macromolecules 2012. [DOI: 10.1021/ma3001719] [Citation(s) in RCA: 2011] [Impact Index Per Article: 167.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Krzysztof Matyjaszewski
- Department of Chemistry, Carnegie Mellon University, 4400 Fifth Avenue, Pittsburgh,
Pennsylvania 15213, United States
| |
Collapse
|
192
|
Husain A, Moheman A, Nami SA, Siddiqi K. Fourteen membered hexaaza copper macrocycle: Synthesis, characterization, crystal structures and the consequence of anion coordination. Inorganica Chim Acta 2012. [DOI: 10.1016/j.ica.2011.12.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
193
|
Rebilly JN, Reinaud O. Supramolecular Bioinorganic Chemistry. Supramol Chem 2012. [DOI: 10.1002/9780470661345.smc174] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
194
|
Gothard NA, Mara MW, Huang J, Szarko JM, Rolczynski B, Lockard JV, Chen LX. Strong Steric Hindrance Effect on Excited State Structural Dynamics of Cu(I) Diimine Complexes. J Phys Chem A 2012; 116:1984-92. [DOI: 10.1021/jp211646p] [Citation(s) in RCA: 77] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Nosheen A. Gothard
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208-3113, United States
| | - Michael W. Mara
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208-3113, United States
- Chemical Sciences and Engineering
Division, Argonne National Laboratory,
9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Jier Huang
- Chemical Sciences and Engineering
Division, Argonne National Laboratory,
9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Jodi M. Szarko
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208-3113, United States
- Chemical Sciences and Engineering
Division, Argonne National Laboratory,
9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Brian Rolczynski
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208-3113, United States
- Chemical Sciences and Engineering
Division, Argonne National Laboratory,
9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Jenny V. Lockard
- Chemical Sciences and Engineering
Division, Argonne National Laboratory,
9700 South Cass Avenue, Argonne, Illinois 60439, United States
| | - Lin X. Chen
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston,
Illinois 60208-3113, United States
- Chemical Sciences and Engineering
Division, Argonne National Laboratory,
9700 South Cass Avenue, Argonne, Illinois 60439, United States
| |
Collapse
|
195
|
Frank P, Benfatto M, Hedman B, Hodgson KO. The X-ray absorption spectroscopic model of the copper(II) imidazole complex ion in liquid aqueous solution: a strongly solvated square pyramid. Inorg Chem 2012; 51:2086-96. [PMID: 22316238 PMCID: PMC3328689 DOI: 10.1021/ic2017819] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Cu K-edge extended X-ray absorption fine structure (EXAFS) and Minuit X-ray absorption near-edge structure (MXAN) analyses were combined to evaluate the structure of the copper(II) imidazole complex ion in liquid aqueous solution. Both methods converged to the same square-pyramidal inner coordination sphere [Cu(Im)(4)L(ax)](2+) (L(ax) indeterminate) with four equatorial nitrogen atoms at EXAFS, 2.02 ± 0.01 Å, and MXAN, 1.99 ± 0.03 Å. A short-axial N/O scatterer (L(ax)) was found at 2.12 ± 0.02 Å (EXAFS) or 2.14 ± 0.06 Å (MXAN). A second but very weak axial Cu-N/O interaction was found at 2.9 ± 0.1 Å (EXAFS) or 3.0 ± 0.1 Å (MXAN). In the MXAN fits, only a square-pyramidal structural model successfully reproduced the doubled maximum of the rising K-edge X-ray absorption spectrum, specifically excluding an octahedral model. Both EXAFS and MXAN also found eight outlying oxygen scatterers at 4.2 ± 0.3 Å that contributed significant intensity over the entire spectral energy range. Two prominent rising K-edge shoulders at 8987.1 and 8990.5 eV were found to reflect multiple scattering from the 3.0 Å axial scatterer and the imidazole rings, respectively. In the MXAN fits, the imidazole rings took in-plane rotationally staggered positions about copper. The combined (EXAFS and MXAN) model for the unconstrained cupric imidazole complex ion in liquid aqueous solution is an axially elongated square-pyramidal core, with a weak nonbonded interaction at the second axial coordination position and a solvation shell of eight nearest-neighbor water molecules. This core square-pyramidal motif has persisted through [Cu(H(2)O)(5)](2+), [Cu(NH(3))(4)(NH(3),H(2)O)](2+), (1, 2) and now [Cu(Im)(4)L(ax))](2+) and appears to be the geometry preferred by unconstrained aqueous-phase copper(II) complex ions.
Collapse
Affiliation(s)
- Patrick Frank
- Department of Chemistry, Stanford University, Stanford, California 94305-5080, United States.
| | | | | | | |
Collapse
|
196
|
Brocato S, Lau C, Atanassov P. Mechanistic study of direct electron transfer in bilirubin oxidase. Electrochim Acta 2012. [DOI: 10.1016/j.electacta.2011.11.074] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
197
|
Tommasino JB, Chastanet G, Guennic BL, Robert V, Pilet G. A 1D coordination polymer built on asymmetric μ1,1,3-azide bridge: from unusual topology to magnetic properties and Cu(ii)/Cu(i) redox reversibility. NEW J CHEM 2012. [DOI: 10.1039/c2nj40302a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
198
|
Mack DJ, Njardarson JT. New mechanistic insights into the copper catalyzed ring expansion of vinyl aziridines: evidence in support of a copper(i) mediated pathway. Chem Sci 2012. [DOI: 10.1039/c2sc21007j] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
199
|
Castillo I, Ugalde-Saldívar VM, Rodríguez Solano LA, Sánchez Eguía BN, Zeglio E, Nordlander E. Structural, spectroscopic, and electrochemical properties of tri- and tetradentate N3 and N3S copper complexes with mixed benzimidazole/thioether donors. Dalton Trans 2012; 41:9394-404. [DOI: 10.1039/c2dt30756a] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
200
|
Stojanović S, Turner DA, Share AI, Flood AH, Hadad CM, Badjić JD. A stereodynamic and redox-switchable encapsulation-complex containing a copper ion held by a tris-quinolinyl basket. Chem Commun (Camb) 2012; 48:4429-31. [DOI: 10.1039/c2cc30339f] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|