1
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Weakly RB, Liekhus-Schmaltz CE, Poulter BI, Biasin E, Alonso-Mori R, Aquila A, Boutet S, Fuller FD, Ho PJ, Kroll T, Loe CM, Lutman A, Zhu D, Bergmann U, Schoenlein RW, Govind N, Khalil M. Revealing core-valence interactions in solution with femtosecond X-ray pump X-ray probe spectroscopy. Nat Commun 2023; 14:3384. [PMID: 37291130 DOI: 10.1038/s41467-023-39165-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 05/26/2023] [Indexed: 06/10/2023] Open
Abstract
Femtosecond pump-probe spectroscopy using ultrafast optical and infrared pulses has become an essential tool to discover and understand complex electronic and structural dynamics in solvated molecular, biological, and material systems. Here we report the experimental realization of an ultrafast two-color X-ray pump X-ray probe transient absorption experiment performed in solution. A 10 fs X-ray pump pulse creates a localized excitation by removing a 1s electron from an Fe atom in solvated ferro- and ferricyanide complexes. Following the ensuing Auger-Meitner cascade, the second X-ray pulse probes the Fe 1s → 3p transitions in resultant novel core-excited electronic states. Careful comparison of the experimental spectra with theory, extracts +2 eV shifts in transition energies per valence hole, providing insight into correlated interactions of valence 3d with 3p and deeper-lying electrons. Such information is essential for accurate modeling and predictive synthesis of transition metal complexes relevant for applications ranging from catalysis to information storage technology. This study demonstrates the experimental realization of the scientific opportunities possible with the continued development of multicolor multi-pulse X-ray spectroscopy to study electronic correlations in complex condensed phase systems.
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Affiliation(s)
- Robert B Weakly
- Department of Chemistry, University of Washington, Seattle, WA, 98195, USA
| | | | - Benjamin I Poulter
- Department of Chemistry, University of Washington, Seattle, WA, 98195, USA
| | - Elisa Biasin
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Roberto Alonso-Mori
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Andrew Aquila
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Sébastien Boutet
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Franklin D Fuller
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Phay J Ho
- Chemical Sciences and Engineering Division, Argonne National Laboratory, Lemont, IL, 60439, USA
| | - Thomas Kroll
- Stanford Synchrotron Radiation Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Caroline M Loe
- Department of Chemistry, University of Washington, Seattle, WA, 98195, USA
| | - Alberto Lutman
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Diling Zhu
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Uwe Bergmann
- Department of Physics, University of Wisconsin-Madison, Madison, WI, 53706, USA
| | - Robert W Schoenlein
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
- Linac Coherent Light Source, SLAC National Accelerator Laboratory, Menlo Park, CA, 94025, USA
| | - Niranjan Govind
- Physical and Computational Sciences Directorate, Pacific Northwest National Laboratory, Richland, WA, 99352, USA
| | - Munira Khalil
- Department of Chemistry, University of Washington, Seattle, WA, 98195, USA.
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2
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Ghosh A, Conradie J. B12 and F430 models: Metal- versus ligand-centered redox in cobalt and nickel tetradehydrocorrin derivatives. J Inorg Biochem 2023; 243:112199. [PMID: 36996695 DOI: 10.1016/j.jinorgbio.2023.112199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Accepted: 03/18/2023] [Indexed: 03/29/2023]
Abstract
DFT calculations with the well-tested OLYP and B3LYP* exchange-correlation functionals (along with D3 dispersion corrections and all-electron ZORA STO-TZ2P basis sets) and careful use of group theory have led to significant insights into the question of metal- versus ligand-centered redox in Co and Ni B,C-tetradehydrocorrin complexes. For the cationic complexes, both metals occur in their low-spin M(II) forms. In contrast, the charge-neutral states vary for the two metals: while the Co(I) and CoII-TDC•2- state are comparable in energy for cobalt, a low-spin NiII-TDC•2- state is clearly preferred for nickel. The latter behavior stands in sharp contrast to other corrinoids that reportedly stabilize a Ni(I) center.
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Affiliation(s)
- Abhik Ghosh
- Department of Chemistry, UiT The Arctic University of Norway, N-9037 Tromsø, Norway.
| | - Jeanet Conradie
- Department of Chemistry, University of the Free State, P.O. Box 339, Bloemfontein 9300, South Africa.
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3
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da Rocha VN, Köhler MH, Nagata K, Piquini PC. Theoretical study of C 6F 5-corrole molecules functionalized with aromatic groups for Photodynamic Therapy. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2023; 293:122500. [PMID: 36827812 DOI: 10.1016/j.saa.2023.122500] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2022] [Revised: 02/07/2023] [Accepted: 02/12/2023] [Indexed: 06/18/2023]
Abstract
The singlet oxygen generation by electronically excited molecules in photodynamic therapy (PDT) requires light absorption within a specific wavelength window, and a subsequent intersystem crossing transition to a triplet excited state that is, at least, 0.98 eV higher in energy than the singlet ground state. Tetrapyrrolic macrocycles, such as porphyrin and corrole, have been widely used in oxygen singlet generation for PDT. Suitable functionalization can potentialize these macrocycles as photosensitizers. In this contribution, we use Density Functional Theory (DFT) calculations to determine the structural, electronic and spectroscopic properties of corrole macrocycles bound to different polycyclic aromatic groups in the gas phase, dichloromethane, and water. We also calculate the spin-orbit coupling (SOC) matrix elements of the intersystem crossing channels involving the first excited singlet states and excited triplet states. The results for optical absorption show that the threshold wavelength for optical absorption increases with the polarity of the environment and the number of aromatic rings of the ligands, whereas the oscillator strengths increase with the polarity of the environment but decrease with the number of aromatic rings. It is verified that the triplet excited states involved in the intersystem crossing transitions satisfy the energy requirement for the oxygen singlet generation. The magnitude of spin-orbit coupling (SOC) matrix elements associated with the intersystem crossing are also seen to be dependent on the environment involving the corrole molecules, and on the number of aromatic rings of the ligands connected to the corrole. Further, the binding of the functionalized corrole molecules with biomolecules as the calf thymus DNA and human serum albumin is studied and characterized through molecular docking. These results show that the corrole macrocycles, suitably functionalized with polycyclic aromatic groups, fulfill several criteria to be considered as good PDT photosensitizers.
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Affiliation(s)
- Vinícius N da Rocha
- Departamento de Física, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil.
| | - Mateus H Köhler
- Departamento de Física, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil.
| | - Khayth Nagata
- Departamento de Física, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil; Instituto de Ciências e Tecnologia das Águas, Universidade Federal do Oeste do Pará, 68040-470, Santarém, PA, Brazil.
| | - Paulo C Piquini
- Departamento de Física, Universidade Federal de Santa Maria, 97105-900, Santa Maria, RS, Brazil.
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4
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Sharma VK, Assaraf YG, Gross Z. Hallmarks of anticancer and antimicrobial activities of corroles. Drug Resist Updat 2023; 67:100931. [PMID: 36739808 DOI: 10.1016/j.drup.2023.100931] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 01/06/2023] [Accepted: 01/16/2023] [Indexed: 01/22/2023]
Abstract
Corroles provide a remarkable opportunity for the development of cancer theranostic agents among other porphyrinoids. While most transition metal corrole complexes are only therapeutic, post-transition metallocorroles also find their applications in bioimaging. Moreover, corroles exhibit excellent photo-physicochemical properties, which can be harnessed for antitumor and antimicrobial interventions. Nevertheless, these intriguing, yet distinct properties of corroles, have not attained sufficient momentum in cancer research. The current review provides a comprehensive summary of various cancer-relevant features of corroles ranging from their structural and photophysical properties, chelation, protein/corrole interactions, to DNA intercalation. Another aspect of the paper deals with the studies of corroles conducted in vitro and in vivo with an emphasis on medical imaging (optical and magnetic resonance), photo/sonodynamic therapies, and photodynamic inactivation. Special attention is also given to a most recent finding that shows the development of pH-responsive phosphorus corrole as a potent antitumor drug for organelle selective antitumor cytotoxicity in preclinical studies. Another biomedical application of corroles is also highlighted, signifying the application of water-soluble and completely lipophilic corroles in the photodynamic inactivation of microorganisms. We strongly believe that future studies will offer a greater possibility of utilizing advanced corroles for selective tumor targeting and antitumor cytotoxicity. In the line with future developments, an ideal pipeline is envisioned on grounds of cancer targeting nanoparticle systems upon decoration with tumor-specific ligands. Hence, we envision that a bright future lies ahead of corrole anticancer research and therapeutics.
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Affiliation(s)
- Vinay K Sharma
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 3200003, Israel.
| | - Yehuda G Assaraf
- The Fred Wyszkowski Cancer Research Laboratory, Department of Biology, Technion-Israel Institute of Technology, Haifa 3200003, Israel.
| | - Zeev Gross
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 3200003, Israel.
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5
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Matson BD, Thomas KE, Alemayehu AB, Ghosh A, Sarangi R. X-ray absorption spectroscopy of exemplary platinum porphyrin and corrole derivatives: metal- versus ligand-centered oxidation. RSC Adv 2021; 11:32269-32274. [PMID: 35495496 PMCID: PMC9041989 DOI: 10.1039/d1ra06151h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 10/11/2021] [Accepted: 09/23/2021] [Indexed: 11/23/2022] Open
Abstract
A combination of Pt L3-edge X-ray absorption spectroscopy (EXAFS and XANES) and DFT (TPSS) calculations have been performed on powder samples of the archetypal platinum porphyrinoid complexes PtII[TpCF3PP], PtIV[TpCF3PP]Cl2, and PtIV[TpCF3PC](Ar)(py), where TpCF3PP2- = meso-tetrakis(p-trifluoromethylphenyl)porphyrinato and TpCF3PC3- = meso-tris(p-trifluoromethylphenyl)corrolato. The three complexes yielded Pt L3-edge energies of 11 566.0 eV, 11 567.2 eV, and 11 567.6 eV, respectively. The 1.2 eV blueshift from the Pt(ii) to the Pt(iv) porphyrin derivative is smaller than expected for a formal two-electron oxidation of the metal center. A rationale was provided by DFT-based Hirshfeld which showed that the porphyrin ligand in the Pt(iv) complex is actually substantially oxidized relative to that in the Pt(ii) complex. The much smaller blueshift of 0.4 eV, going from PtIV[TpCF3PP]Cl2, and PtIV[TpCF3PC](Ar)(py), is ascribable to the significantly stronger ligand field in the latter compound.
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Affiliation(s)
- Benjamin D Matson
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University Menlo Park California 94025 USA
| | - Kolle E Thomas
- Department of Chemistry, UiT - The Arctic University of Norway N-9037 Tromsø Norway
| | - Abraham B Alemayehu
- Department of Chemistry, UiT - The Arctic University of Norway N-9037 Tromsø Norway
| | - Abhik Ghosh
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University Menlo Park California 94025 USA
| | - Ritimukta Sarangi
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University Menlo Park California 94025 USA
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6
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Sharma VK, Mahammed A, Mizrahi A, Morales M, Fridman N, Gray HB, Gross Z. Dimeric Corrole Analogs of Chlorophyll Special Pairs. J Am Chem Soc 2021; 143:9450-9460. [PMID: 34014656 PMCID: PMC8249354 DOI: 10.1021/jacs.1c02362] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Chlorophyll special pairs in photosynthetic reaction centers function as both exciton acceptors and primary electron donors. Although the macrocyclic natural pigments contain Mg(II), the central metal in most synthetic analogs is Zn(II). Here we report that insertion of either Al(III) or Ga(III) into an imidazole-substituted corrole affords an exceptionally robust photoactive dimer. Notably, attractive electronic interactions between dimer subunits are relatively strong, as documented by signature changes in NMR and electronic absorption spectra, as well as by cyclic voltammetry, where two well-separated reversible redox couples were observed. EPR spectra of one-electron oxidized dimers closely mimic those of native special pairs, and strong through-space interactions between corrole subunits inferred from spectroscopic and electrochemical data are further supported by crystal structure analyses (3 Å interplanar distances, 5 Å lateral shifts, and 6 Å metal to metal distances).
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Affiliation(s)
- Vinay K. Sharma
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel
| | - Atif Mahammed
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel
| | - Amir Mizrahi
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel
- Department of Chemistry, Nuclear Research Center Negev, Beer Sheva, 9001, Israel
| | - Maryann Morales
- Beckman Institute, California Institute of Technology, Pasadena, California 91125, United States
| | - Natalia Fridman
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel
| | - Harry B. Gray
- Beckman Institute, California Institute of Technology, Pasadena, California 91125, United States
| | - Zeev Gross
- Schulich Faculty of Chemistry, Technion - Israel Institute of Technology, Haifa 32000, Israel
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7
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Gericke R, Doyle LM, Farquhar ER, McDonald AR. Oxo-Free Hydrocarbon Oxidation by an Iron(III)-Isoporphyrin Complex. Inorg Chem 2020; 59:13952-13961. [PMID: 32955871 DOI: 10.1021/acs.inorgchem.0c01618] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Metal-halides that perform proton coupled electron-transfer (PCET) oxidation are an important new class of high-valent oxidant. In investigating metal-dihalides, we reacted [FeIII(Cl)(T(OMe)PP)] (1, T(OMe)PP = meso-tetra(4-methoxyphenyl)porphyrinyl) with (dichloroiodo)benzene. An FeIII-meso-chloro-isoporphyrin complex [FeIII(Cl)2(T(OMe)PP-Cl)] (2) was obtained. 2 was characterized by electronic absorption, 1H NMR, EPR, and X-ray absorption spectroscopies and mass spectrometry with support from computational analyses. 2 was reacted with a series of hydrocarbon substrates. The measured kinetic data exhibited a nonlinear behavior, whereby the oxidation followed a hydrogen-atom-transfer (HAT) PCET mechanism. The meso-chlorine atom was identified as the HAT agent. In one case, a halogenated product was identified by mass spectrometry. Our findings demonstrate that oxo-free hydrocarbon oxidation with heme systems is possible and show the potential for iron-dihalides in oxidative hydrocarbon halogenation.
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Affiliation(s)
- Robert Gericke
- School of Chemistry, College Green, Trinity College Dublin, The University of Dublin, Dublin 2 D02 PN40, Ireland
| | - Lorna M Doyle
- School of Chemistry, College Green, Trinity College Dublin, The University of Dublin, Dublin 2 D02 PN40, Ireland
| | - Erik R Farquhar
- National Synchrotron Light Source II, Brookhaven National Laboratory, Case Western Reserve University Center for Synchrotron Biosciences, Upton, New York 11973, United States
| | - Aidan R McDonald
- School of Chemistry, College Green, Trinity College Dublin, The University of Dublin, Dublin 2 D02 PN40, Ireland
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8
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Cao R, Thomas KE, Ghosh A, Sarangi R. X-ray absorption spectroscopy of archetypal chromium porphyrin and corrole derivatives. RSC Adv 2020; 10:20572-20578. [PMID: 35517776 PMCID: PMC9054285 DOI: 10.1039/d0ra02335c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 05/13/2020] [Indexed: 01/16/2023] Open
Abstract
A Cr K-edge XAS study of paradigmatic chromium porphyrin and corrole derivatives has been carried out, providing key data for the Cr(iv) and Cr(v) oxidation states.
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Affiliation(s)
- Rui Cao
- Stanford Synchrotron Radiation Lightsource
- SLAC National Accelerator Laboratory
- Stanford University
- Menlo Park
- USA
| | - Kolle E. Thomas
- Department of Chemistry
- UiT – the Arctic University of Norway
- N-9037 Tromsø
- Norway
| | - Abhik Ghosh
- Department of Chemistry
- UiT – the Arctic University of Norway
- N-9037 Tromsø
- Norway
| | - Ritimukta Sarangi
- Stanford Synchrotron Radiation Lightsource
- SLAC National Accelerator Laboratory
- Stanford University
- Menlo Park
- USA
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9
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Zhong YQ, Hossain MS, Chen Y, Fan QH, Zhan SZ, Liu HY. A comparative study of electrocatalytic hydrogen evolution by iron complexes of corrole and porphyrin from acetic acid and water. TRANSIT METAL CHEM 2019. [DOI: 10.1007/s11243-019-00307-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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10
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Resonant inelastic X-ray scattering determination of the electronic structure of oxyhemoglobin and its model complex. Proc Natl Acad Sci U S A 2019; 116:2854-2859. [PMID: 30718404 DOI: 10.1073/pnas.1815981116] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Hemoglobin and myoglobin are oxygen-binding proteins with S = 0 heme {FeO2}8 active sites. The electronic structure of these sites has been the subject of much debate. This study utilizes Fe K-edge X-ray absorption spectroscopy (XAS) and 1s2p resonant inelastic X-ray scattering (RIXS) to study oxyhemoglobin and a related heme {FeO2}8 model compound, [(pfp)Fe(1-MeIm)(O2)] (pfp = meso-tetra(α,α,α,α-o-pivalamido-phenyl)porphyrin, or TpivPP, 1-MeIm = 1-methylimidazole) (pfpO2), which was previously analyzed using L-edge XAS. The K-edge XAS and RIXS data of pfpO2 and oxyhemoglobin are compared with the data for low-spin FeII and FeIII [Fe(tpp)(Im)2]0/+ (tpp = tetra-phenyl porphyrin) compounds, which serve as heme references. The X-ray data show that pfpO2 is similar to FeII, while oxyhemoglobin is qualitatively similar to FeIII, but with significant quantitative differences. Density-functional theory (DFT) calculations show that the difference between pfpO2 and oxyhemoglobin is due to a distal histidine H bond to O2 and the less hydrophobic environment in the protein, which lead to more backbonding into the O2 A valence bond configuration interaction multiplet model is used to analyze the RIXS data and show that pfpO2 is dominantly FeII with 6-8% FeIII character, while oxyhemoglobin has a very mixed wave function that has 50-77% FeIII character and a partially polarized Fe-O2 π-bond.
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11
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Ganguly S, MCormick LJ, Conradie J, Gagnon KJ, Sarangi R, Ghosh A. Electronic Structure of Manganese Corroles Revisited: X-ray Structures, Optical and X-ray Absorption Spectroscopies, and Electrochemistry as Probes of Ligand Noninnocence. Inorg Chem 2018; 57:9656-9669. [DOI: 10.1021/acs.inorgchem.8b00537] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Sumit Ganguly
- Department of Chemistry, UiT—The Arctic University of Norway, Tromsø N-9037, Norway
| | - Laura J. MCormick
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720-8229, United States
| | - Jeanet Conradie
- Department of Chemistry, University of the Free State, Bloemfontein 9300, Republic of South Africa
| | - Kevin J. Gagnon
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720-8229, United States
| | - Ritimukta Sarangi
- Structural Molecular Biology (SMB), Stanford Synchrotron Radiation Lightsource (SSRL), SLAC National Accelerator Laboratory, Menlo Park, California 94306, United States
| | - Abhik Ghosh
- Department of Chemistry, UiT—The Arctic University of Norway, Tromsø N-9037, Norway
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12
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Jiang X, Pomarico G, Bischetti M, Galloni P, Cicero DO, Cui Y, Kadish KM, Paolesse R. Iron, iron everywhere: synthesis and characterization of iron 5,10,15-triferrocenylcorrole complexes. NEW J CHEM 2018. [DOI: 10.1039/c7nj05076c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A new series of iron triferrocenylcorroles with three different axial ligands, NO, Cl−and σ-Ph, is synthesized and characterized using1H NMR, electrochemical and spectroelectrochemical techniques in nonaqueous media.
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Affiliation(s)
- X. Jiang
- Department of Chemistry, University of Houston
- USA
| | - G. Pomarico
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata
- 00133 Rome
- Italy
| | - M. Bischetti
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata
- 00133 Rome
- Italy
| | - P. Galloni
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata
- 00133 Rome
- Italy
| | - D. O. Cicero
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata
- 00133 Rome
- Italy
| | - Y. Cui
- Department of Chemistry, University of Houston
- USA
| | - K. M. Kadish
- Department of Chemistry, University of Houston
- USA
| | - R. Paolesse
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata
- 00133 Rome
- Italy
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13
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Ganguly S, Giles LJ, Thomas KE, Sarangi R, Ghosh A. Ligand Noninnocence in Iron Corroles: Insights from Optical and X-ray Absorption Spectroscopies and Electrochemical Redox Potentials. Chemistry 2017; 23:15098-15106. [PMID: 28845891 PMCID: PMC5710759 DOI: 10.1002/chem.201702621] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Indexed: 11/11/2022]
Abstract
Two new series of iron meso-tris(para-X-phenyl)corrole (TpXPC) complexes, Fe[TpXPC]Ph and Fe[TpXPC]Tol, in which X=CF3 , H, Me, and OMe, and Tol=p-methylphenyl (p-tolyl), have been synthesized, allowing a multitechnique electronic-structural comparison with the corresponding FeCl, FeNO, and Fe2 (μ-O) TpXPC derivatives. Optical spectroscopy revealed that the Soret maxima of the FePh and FeTol series are insensitive to the phenyl para substituent, consistent with the presumed innocence of the corrole ligand in these compounds. Accordingly, we may be increasingly confident in the ability of the substituent effect criterion to serve as a probe of corrole noninnocence. Furthermore, four complexes-Fe[TPC]Cl, Fe[TPC](NO), {Fe[TPC]}2 O, and Fe[TPC]Ph-were selected for a detailed XANES investigation of the question of ligand noninnocence. The intensity-weighted average energy (IWAE) positions were found to exhibit rather modest variations (0.8 eV over the series of corroles). The integrated Fe-K pre-edge intensities, on the other hand, vary considerably, with a 2.5 fold increase for Fe[TPC]Ph relative to Fe[TPC]Cl and Fe[TPC](NO). Given the approximately C4v local symmetry of the Fe in all the complexes, the large increase in intensity for Fe[TPC]Ph may be attributed to a higher number of 3d holes, consistent with an expected FeIV -like description, in contrast to Fe[TPC]Cl and Fe[TPC](NO), in which the Fe is thought to be FeIII -like. These results afford strong validation of XANES as a probe of ligand noninnocence in metallocorroles. Electrochemical redox potentials, on the other hand, were found not to afford a simple probe of ligand noninnocence in Fe corroles.
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Affiliation(s)
- Sumit Ganguly
- Department of Chemistry and Center for Theoretical and Computational Chemistry, UiT-, The Arctic University of Norway, 9037, Tromsø, Norway
| | - Logan J Giles
- Structural Molecular Biology, Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, 94306, USA
| | - Kolle E Thomas
- Department of Chemistry and Center for Theoretical and Computational Chemistry, UiT-, The Arctic University of Norway, 9037, Tromsø, Norway
| | - Ritimukta Sarangi
- Structural Molecular Biology, Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, CA, 94306, USA
| | - Abhik Ghosh
- Department of Chemistry and Center for Theoretical and Computational Chemistry, UiT-, The Arctic University of Norway, 9037, Tromsø, Norway
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14
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Morales Vásquez MA, Hamer M, Neuman NI, Tesio AY, Hunt A, Bogo H, Calvo EJ, Doctorovich F. Iron and Cobalt Corroles in Solution and on Carbon Nanotubes as Molecular Photocatalysts for Hydrogen Production by Water Reduction. ChemCatChem 2017. [DOI: 10.1002/cctc.201700349] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Miguel A. Morales Vásquez
- INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, CONICET; Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires; Ciudad Universitaria; Pabellón II Buenos Aires C1428EHA Argentina
| | - Mariana Hamer
- Instituto de Nanosistemas; Universidad Nacional de San Martin, CONICET; Buenos Aires B1650 Argentina
| | - Nicolás I. Neuman
- INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, CONICET; Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires; Ciudad Universitaria; Pabellón II Buenos Aires C1428EHA Argentina
- Departamento de Física, FBCB-UNL, CONICET; Facultad de Bioquímica y Ciencias Biológicas; Ciudad Universitaria; Ruta N 168 S/N S3000ZAA Santa Fe Argentina
| | - Alvaro Y. Tesio
- INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, CONICET; Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires; Ciudad Universitaria; Pabellón II Buenos Aires C1428EHA Argentina
| | - Andrés Hunt
- INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, CONICET; Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires; Ciudad Universitaria; Pabellón II Buenos Aires C1428EHA Argentina
| | - Horacio Bogo
- INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, CONICET; Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires; Ciudad Universitaria; Pabellón II Buenos Aires C1428EHA Argentina
| | - Ernesto J. Calvo
- INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, CONICET; Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires; Ciudad Universitaria; Pabellón II Buenos Aires C1428EHA Argentina
| | - Fabio Doctorovich
- INQUIMAE, Departamento de Química Inorgánica, Analítica y Química Física, CONICET; Facultad de Ciencias Exactas y Naturales; Universidad de Buenos Aires; Ciudad Universitaria; Pabellón II Buenos Aires C1428EHA Argentina
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15
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Ghosh A. Electronic Structure of Corrole Derivatives: Insights from Molecular Structures, Spectroscopy, Electrochemistry, and Quantum Chemical Calculations. Chem Rev 2017; 117:3798-3881. [PMID: 28191934 DOI: 10.1021/acs.chemrev.6b00590] [Citation(s) in RCA: 218] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Presented herein is a comprehensive account of the electronic structure of corrole derivatives. Our knowledge in this area derives from a broad range of methods, including UV-vis-NIR absorption and MCD spectroscopies, single-crystal X-ray structure determination, vibrational spectroscopy, NMR and EPR spectroscopies, electrochemistry, X-ray absorption spectroscopy, and quantum chemical calculations, the latter including both density functional theory and ab initio multiconfigurational methods. The review is organized according to the Periodic Table, describing free-base and main-group element corrole derivatives, then transition-metal corroles, and finally f-block element corroles. Like porphyrins, corrole derivatives with a redox-inactive coordinated atom follow the Gouterman four-orbital model. A key difference from porphyrins is the much wider prevalence of noninnocent electronic structures as well as full-fledged corrole•2- radicals among corrole derivatives. The most common orbital pathways mediating ligand noninnocence in transition-metal corroles are the metal(dz2)-corrole("a2u") interaction (most commonly observed in Mn and Fe corroles) and the metal(dx2-y2)-corrole(a2u) interaction in coinage metal corroles. Less commonly encountered is the metal(dπ)-corrole("a1u") interaction, a unique feature of formal d5 metallocorroles. Corrole derivatives exhibit a rich array of optical properties, including substituent-sensitive Soret maxima indicative of ligand noninnocence, strong fluorescence in the case of lighter main-group element complexes, and room-temperature near-IR phosphorescence in the case of several 5d metal complexes. The review concludes with an attempt at identifying gaps in our current knowledge and potential future directions of electronic-structural research on corrole derivatives.
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Affiliation(s)
- Abhik Ghosh
- Department of Chemistry and Center for Theoretical and Computational Chemistry, UiT-The Arctic University of Norway , 9037 Tromsø, Norway
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16
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K- and L-edge X-ray Absorption Spectroscopy (XAS) and Resonant Inelastic X-ray Scattering (RIXS) Determination of Differential Orbital Covalency (DOC) of Transition Metal Sites. Coord Chem Rev 2017; 345:182-208. [PMID: 28970624 DOI: 10.1016/j.ccr.2017.02.004] [Citation(s) in RCA: 108] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Continual advancements in the development of synchrotron radiation sources have resulted in X-ray based spectroscopic techniques capable of probing the electronic and structural properties of numerous systems. This review gives an overview of the application of metal K-edge and L-edge X-ray absorption spectroscopy (XAS), as well as K resonant inelastic X-ray scattering (RIXS), to the study of electronic structure in transition metal sites with emphasis on experimentally quantifying 3d orbital covalency. The specific sensitivities of K-edge XAS, L-edge XAS, and RIXS are discussed emphasizing the complementary nature of the methods. L-edge XAS and RIXS are sensitive to mixing between 3d orbitals and ligand valence orbitals, and to the differential orbital covalency (DOC), that is, the difference in the covalencies for different symmetry sets of the d orbitals. Both L-edge XAS and RIXS are highly sensitive to and enable separation of and donor bonding and back bonding contributions to bonding. Applying ligand field multiplet simulations, including charge transfer via valence bond configuration interactions, DOC can be obtained for direct comparison with density functional theory calculations and to understand chemical trends. The application of RIXS as a probe of frontier molecular orbitals in a heme enzyme demonstrates the potential of this method for the study of metal sites in highly covalent coordination sites in bioinorganic chemistry.
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17
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Yan JJ, Gonzales MA, Mascharak PK, Hedman B, Hodgson KO, Solomon EI. L-Edge X-ray Absorption Spectroscopic Investigation of {FeNO} 6: Delocalization vs Antiferromagnetic Coupling. J Am Chem Soc 2017; 139:1215-1225. [PMID: 28006897 PMCID: PMC5322818 DOI: 10.1021/jacs.6b11260] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
NO is a classic non-innocent ligand, and iron nitrosyls can have different electronic structure descriptions depending on their spin state and coordination environment. These highly covalent ligands are found in metalloproteins and are also used as models for Fe-O2 systems. This study utilizes iron L-edge X-ray absorption spectroscopy (XAS), interpreted using a valence bond configuration interaction multiplet model, to directly experimentally probe the electronic structure of the S = 0 {FeNO}6 compound [Fe(PaPy3)NO]2+ (PaPy3 = N,N-bis(2-pyridylmethyl)amine-N-ethyl-2-pyridine-2-carboxamide) and the S = 0 [Fe(PaPy3)CO]+ reference compound. This method allows separation of the σ-donation and π-acceptor interactions of the ligand through ligand-to-metal and metal-to-ligand charge-transfer mixing pathways. The analysis shows that the {FeNO}6 electronic structure is best described as FeIII-NO(neutral), with no localized electron in an NO π* orbital or electron hole in an Fe dπ orbital. This delocalization comes from the large energy gap between the Fe-NO π-bonding and antibonding molecular orbitals relative to the exchange interactions between electrons in these orbitals. This study demonstrates the utility of L-edge XAS in experimentally defining highly delocalized electronic structures.
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Affiliation(s)
- James J Yan
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
| | - Margarita A Gonzales
- Department of Chemistry, Foothill College , Los Altos Hills, California 94022, United States
| | - Pradip K Mascharak
- Department of Chemistry and Biochemistry, University of California , Santa Cruz, California 95064, United States
| | - Britt Hedman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University , Menlo Park, California 94025, United States
| | - Keith O Hodgson
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University , Menlo Park, California 94025, United States
| | - Edward I Solomon
- Department of Chemistry, Stanford University , Stanford, California 94305, United States
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University , Menlo Park, California 94025, United States
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18
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Mittra K, Mondal B, Mahammed A, Gross Z, Dey A. Dioxygen bound cobalt corroles. Chem Commun (Camb) 2017; 53:877-880. [DOI: 10.1039/c6cc06982g] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Two cobalt–dioxygen adducts, [CoH8]–O2 and [CoCl8]–O2, chelated by electron-rich and electron-poor corroles, respectively, were isolated in solution and characterized by resonance Raman.
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Affiliation(s)
- Kaustuv Mittra
- Department of Inorganic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata
- India 700032
| | - Biswajit Mondal
- Department of Inorganic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata
- India 700032
| | - Atif Mahammed
- Schulich Faculty of Chemistry
- Technion-Israel Institute of Technology
- Haifa 32000
- Israel
| | - Zeev Gross
- Schulich Faculty of Chemistry
- Technion-Israel Institute of Technology
- Haifa 32000
- Israel
| | - Abhishek Dey
- Department of Inorganic Chemistry
- Indian Association for the Cultivation of Science
- Kolkata
- India 700032
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19
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Abstract
Corroles are exceptionally promising platforms for the development of agents for simultaneous cancer-targeting imaging and therapy. Depending on the element chelated by the corrole, these theranostic agents may be tuned primarily for diagnostic or therapeutic function. Versatile synthetic methodologies allow for the preparation of amphipolar derivatives, which form stable noncovalent conjugates with targeting biomolecules. These conjugates can be engineered for imaging and targeting as well as therapeutic function within one theranostic assembly. In this review, we begin with a brief outline of corrole chemistry that has been uniquely useful in designing corrole-based anticancer agents. Then we turn attention to the early literature regarding corrole anticancer activity, which commenced one year after the first scalable synthesis was reported (1999-2000). In 2001, a major advance was made with the introduction of negatively charged corroles, as these molecules, being amphipolar, form stable conjugates with many proteins. More recently, both cellular uptake and intracellular trafficking of metallocorroles have been documented in experimental investigations employing advanced optical spectroscopic as well as magnetic resonance imaging techniques. Key results from work on both cellular and animal models are reviewed, with emphasis on those that have shed new light on the mechanisms associated with anticancer activity. In closing, we predict a very bright future for corrole anticancer research, as it is experiencing exponential growth, taking full advantage of recently developed imaging and therapeutic modalities.
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Affiliation(s)
- Ruijie D Teo
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
| | - Jae Youn Hwang
- Department of Information and Communication Engineering, Daegu Gyeongbuk Institute of Science & Technology , Daegu, Republic of Korea
| | - John Termini
- Department of Molecular Medicine, Beckman Research Institute of the City of Hope , 1500 East Duarte Road, Duarte, California 91010, United States
| | - Zeev Gross
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology , Haifa 32000, Israel
| | - Harry B Gray
- Division of Chemistry and Chemical Engineering, California Institute of Technology , Pasadena, California 91125, United States
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20
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Delgado-Jaime MU, Zhang K, Vura-Weis J, de Groot FMF. CTM4DOC: electronic structure analysis from X-ray spectroscopy. JOURNAL OF SYNCHROTRON RADIATION 2016; 23:1264-71. [PMID: 27577785 PMCID: PMC5006656 DOI: 10.1107/s1600577516012443] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2016] [Accepted: 08/01/2016] [Indexed: 05/29/2023]
Abstract
Two electronic structure descriptions, one based on orbitals and the other based on term symbols, have been implemented in a new Matlab-based program, CTM4DOC. The program includes a graphical user interface that allows the user to explore the dependence of details of electronic structure in transition metal systems, both in the ground and core-hole excited states, on intra-atomic electron-electron, crystal-field and charge-transfer interactions. The program can also track the evolution of electronic structure features as the crystal-field parameters are systematically varied, generating Tanabe-Sugano-type diagrams. Examples on first-row transition metal systems are presented and the implications on the interpretation of X-ray spectra and on the understanding of low-spin, high-spin and mixed-spin systems are discussed.
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Affiliation(s)
- Mario Ulises Delgado-Jaime
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, Utrecht 3584 CG, The Netherlands
| | - Kaili Zhang
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Josh Vura-Weis
- Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Frank M. F. de Groot
- Inorganic Chemistry and Catalysis Group, Debye Institute for Nanomaterials Science, Utrecht University, Universiteitsweg 99, Utrecht 3584 CG, The Netherlands
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21
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Ganguly S, Vazquez-Lima H, Ghosh A. Wolves in Sheep's Clothing: μ-Oxo-Diiron Corroles Revisited. Chemistry 2016; 22:10336-40. [DOI: 10.1002/chem.201601062] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2016] [Indexed: 11/11/2022]
Affiliation(s)
- Sumit Ganguly
- Department of Chemistry and Center for Theoretical and Computational Chemistry; UiT - The Arctic University of Norway; 9037 Tromsø Norway
| | - Hugo Vazquez-Lima
- Department of Chemistry and Center for Theoretical and Computational Chemistry; UiT - The Arctic University of Norway; 9037 Tromsø Norway
| | - Abhik Ghosh
- Department of Chemistry and Center for Theoretical and Computational Chemistry; UiT - The Arctic University of Norway; 9037 Tromsø Norway
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22
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Sarangi R, Giles LJ, Thomas KE, Ghosh A. Ligand Noninnocence in Silver Corroles: A XANES Investigation. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600413] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ritimukta Sarangi
- Structural Molecular Biology; Stanford Synchrotron Radiation Lightsource; SLAC National Accelerator Laboratory; Menlo Park 94306 CA USA
| | - Logan J. Giles
- Structural Molecular Biology; Stanford Synchrotron Radiation Lightsource; SLAC National Accelerator Laboratory; Menlo Park 94306 CA USA
| | - Kolle E. Thomas
- Department of Chemistry and Center for Theoretical and Computational Chemistry; UiT - The Arctic University of Norway; 9037 Tromsø Norway
| | - Abhik Ghosh
- Department of Chemistry and Center for Theoretical and Computational Chemistry; UiT - The Arctic University of Norway; 9037 Tromsø Norway
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23
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List NH, Kauczor J, Saue T, Jensen HJA, Norman P. Beyond the electric-dipole approximation: A formulation and implementation of molecular response theory for the description of absorption of electromagnetic field radiation. J Chem Phys 2016; 142:244111. [PMID: 26133414 DOI: 10.1063/1.4922697] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We present a formulation of molecular response theory for the description of a quantum mechanical molecular system in the presence of a weak, monochromatic, linearly polarized electromagnetic field without introducing truncated multipolar expansions. The presentation focuses on a description of linear absorption by adopting the energy-loss approach in combination with the complex polarization propagator formulation of response theory. Going beyond the electric-dipole approximation is essential whenever studying electric-dipole-forbidden transitions, and in general, non-dipolar effects become increasingly important when addressing spectroscopies involving higher-energy photons. These two aspects are examined by our study of the near K-edge X-ray absorption fine structure of the alkaline earth metals (Mg, Ca, Sr, Ba, and Ra) as well as the trans-polyenes. In following the series of alkaline earth metals, the sizes of non-dipolar effects are probed with respect to increasing photon energies and a detailed assessment of results is made in terms of studying the pertinent transition electron densities and in particular their spatial extension in comparison with the photon wavelength. Along the series of trans-polyenes, the sizes of non-dipolar effects are probed for X-ray spectroscopies on organic molecules with respect to the spatial extension of the chromophore.
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Affiliation(s)
- Nanna Holmgaard List
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Joanna Kauczor
- Department of Physics, Chemistry and Biology, Linköping University, Linköping SE 58183, Sweden
| | - Trond Saue
- Laboratoire de Chimie et Physique Quantiques, UMR 5626-CNRS/Université Toulouse III (Paul Sabatier), 118 route de Narbonne, F-31062 Toulouse Cedex, France
| | - Hans Jørgen Aagaard Jensen
- Department of Physics, Chemistry and Pharmacy, University of Southern Denmark, Campusvej 55, DK-5230 Odense M, Denmark
| | - Patrick Norman
- Department of Physics, Chemistry and Biology, Linköping University, Linköping SE 58183, Sweden
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24
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Park KH, Ooi S, Kim T, Tanaka T, Osuka A, Kim D. Excited-state torsional relaxation dynamics of meso–meso directly linked corrole dimers: importance of linking position. Phys Chem Chem Phys 2016; 18:23374-82. [DOI: 10.1039/c6cp04040c] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The effect of linking position on the excited-state dynamics of meso-meso directly linked corrole dimers is explored.
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Affiliation(s)
- Kyu Hyung Park
- Spectroscopy Laboratory for Functional π-Electronic Systems
- Department of Chemistry
- Yonsei University
- Seoul 120-749
- Korea
| | - Shota Ooi
- Department of Chemistry
- Graduate School of Science
- Kyoto University
- Kyoto 606-8502
- Japan
| | - Taeyeon Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems
- Department of Chemistry
- Yonsei University
- Seoul 120-749
- Korea
| | - Takayuki Tanaka
- Department of Chemistry
- Graduate School of Science
- Kyoto University
- Kyoto 606-8502
- Japan
| | - Atsuhiro Osuka
- Department of Chemistry
- Graduate School of Science
- Kyoto University
- Kyoto 606-8502
- Japan
| | - Dongho Kim
- Spectroscopy Laboratory for Functional π-Electronic Systems
- Department of Chemistry
- Yonsei University
- Seoul 120-749
- Korea
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25
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Einrem RF, Gagnon KJ, Alemayehu AB, Ghosh A. Metal-Ligand Misfits: Facile Access to Rhenium-Oxo Corroles by Oxidative Metalation. Chemistry 2015; 22:517-20. [PMID: 26639951 DOI: 10.1002/chem.201504307] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Indexed: 11/08/2022]
Abstract
With the exception of a single accidental synthesis, rhenium corroles are unknown, but of great interest as catalysts and potential radiopharmaceuticals. Oxidative metalation of meso-triarylcorroles with [Re2 (CO)10 ] in refluxing decalin has provided a facile and relatively high-yielding route to rhenium(V)-oxo corroles. The complexes synthesized could all be fully characterized by single-crystal X-ray structure analyses.
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Affiliation(s)
- Rune F Einrem
- Department of Chemistry, UiT - The Arctic University of Norway, 9037 Tromsø (Norway)
| | - Kevin J Gagnon
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720-8229 (USA)
| | - Abraham B Alemayehu
- Department of Chemistry, UiT - The Arctic University of Norway, 9037 Tromsø (Norway).
| | - Abhik Ghosh
- Department of Chemistry, UiT - The Arctic University of Norway, 9037 Tromsø (Norway).
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26
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Thomas KE, Vazquez-Lima H, Fang Y, Song Y, Gagnon KJ, Beavers CM, Kadish KM, Ghosh A. Ligand Noninnocence in Coinage Metal Corroles: A Silver Knife-Edge. Chemistry 2015; 21:16839-47. [PMID: 26345592 DOI: 10.1002/chem.201502150] [Citation(s) in RCA: 77] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2015] [Indexed: 11/11/2022]
Abstract
A silver β-octabromo-meso-triarylcorrole has been found to exhibit a strongly saddled geometry, providing the first instance of a strongly saddled corrole complex involving a metal other than copper. The Soret maxima of the Ag octabromocorroles also redshift markedly in response to increasingly electron-donating para substituents on the meso-aryl groups. In both these respects, the Ag octabromocorroles differ from simple Ag triarylcorrole derivatives, which exhibit only mild saddling and substituent-insensitive Soret maxima. These results have been rationalized in terms of an innocent M(III)-corrole(3-) description for the simple Ag corroles and a noninnocent M(II)-corrole(·2-) description for the Ag octabromocorroles. In contrast, all copper corroles are thought to be noninnocent, while all gold corroles are innocent. Uniquely among metallocorroles, silver corroles thus seem poised on a knife-edge, so to speak, between innocent and noninnocent electronic structures and may tip either way, depending on the exact nature of the corrole ligand.
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Affiliation(s)
- Kolle E Thomas
- Department of Chemistry and Center for Theoretical and Computational Chemistry, UiT - The Arctic University of Norway, 9037 Tromsø (Norway)
| | - Hugo Vazquez-Lima
- Department of Chemistry and Center for Theoretical and Computational Chemistry, UiT - The Arctic University of Norway, 9037 Tromsø (Norway)
| | - Yuanyuan Fang
- Department of Chemistry, University of Houston, Houston, TX 77204-5003 (USA)
| | - Yang Song
- Department of Chemistry, University of Houston, Houston, TX 77204-5003 (USA)
| | - Kevin J Gagnon
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720-8229 (USA)
| | - Christine M Beavers
- Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, CA 94720-8229 (USA)
| | - Karl M Kadish
- Department of Chemistry, University of Houston, Houston, TX 77204-5003 (USA).
| | - Abhik Ghosh
- Department of Chemistry and Center for Theoretical and Computational Chemistry, UiT - The Arctic University of Norway, 9037 Tromsø (Norway).
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27
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Rhoda HM, Crandall LA, Geier GR, Ziegler CJ, Nemykin VN. Combined MCD/DFT/TDDFT Study of the Electronic Structure of Axially Pyridine Coordinated Metallocorroles. Inorg Chem 2015; 54:4652-62. [PMID: 25950991 DOI: 10.1021/ic502946t] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
A series of metallocorroles were investigated by UV-vis and magnetic circular dichroism spectroscopies. The diamagnetic distorted square-pyramidal main-group corrole Ga(tpfc)py (2), the diamagnetic distorted octahedral transition-metal adduct Co(tpfc)(py)2 (3), and paramagnetic distorted octahedral transition-metal complex Fe(tpfc)(py)2 (4) [H3tpfc = tris(perfluorophenyl)corrole] were studied to investigate similarities and differences in the electronic structure and spectroscopy of the closed- and open-shell metallocorroles. Similar to the free-base H3tpfc (1), inspection of the MCD Faraday B-terms for all of the macrocycles presented in this report revealed that a ΔHOMO < ΔLUMO [ΔHOMO is the energy difference between two highest energy corrole-centered π-orbitals and ΔLUMO is the energy difference between two lowest energy corrole-centered π*-orbitals originating from ML ± 4 and ML ± 5 pairs of perimeter] condition is present for each complex, which results in an unusual sign-reversed sequence for π-π* transitions in their MCD spectra. In addition, the MCD spectra of the cobalt and the iron complexes were also complicated by a number of charge-transfer states in the visible region. Iron complex 4 also exhibits a low-energy absorption in the NIR region (1023 nm). DFT and TDDFT calculations were used to elaborate the electronic structures and provide band assignments in UV-vis and MCD spectra of the metallocorroles. DFT and TDDFT calculations predict that the orientation of the axial pyridine ligand(s) has a very minor influence on the calculated electronic structures and absorption spectra in the target systems.
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Affiliation(s)
| | - Laura A Crandall
- †Department of Chemistry, University of Akron, 190 E. Buchtel Common, Akron, Ohio 44325-3601, United States
| | - G Richard Geier
- §Department of Chemistry, Colgate University, Hamilton, New York 13346, United States
| | - Christopher J Ziegler
- †Department of Chemistry, University of Akron, 190 E. Buchtel Common, Akron, Ohio 44325-3601, United States
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28
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Haber A, Gross Z. Catalytic antioxidant therapy by metallodrugs: lessons from metallocorroles. Chem Commun (Camb) 2015; 51:5812-27. [DOI: 10.1039/c4cc08715a] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This article provides a perspective on the utility of metal-based catalytic antioxidants for disease prevention or treatment, with focus on their mode of action and its dependence (DCA) or independence (ICA) on the involvement of cofactors.
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Affiliation(s)
- Adi Haber
- Schulich Faculty of Chemistry
- Technion – Israel Institute of Technology
- Technion City
- Israel
| | - Zeev Gross
- Schulich Faculty of Chemistry
- Technion – Israel Institute of Technology
- Technion City
- Israel
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29
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Sakow D, Baabe D, Böker B, Burghaus O, Funk M, Kleeberg C, Menzel D, Pietzonka C, Bröring M. Iron 10-Thiacorroles: Bioinspired Iron(III) Complexes with an Intermediate Spin (S=3/2) Ground State. Chemistry 2014; 20:2913-24. [DOI: 10.1002/chem.201303786] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 10/17/2013] [Indexed: 11/07/2022]
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30
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Lundberg M, Kroll T, DeBeer S, Bergmann U, Wilson SA, Glatzel P, Nordlund D, Hedman B, Hodgson KO, Solomon EI. Metal-ligand covalency of iron complexes from high-resolution resonant inelastic X-ray scattering. J Am Chem Soc 2013; 135:17121-34. [PMID: 24131028 PMCID: PMC3920600 DOI: 10.1021/ja408072q] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Data from Kα resonant inelastic X-ray scattering (RIXS) have been used to extract electronic structure information, i.e., the covalency of metal-ligand bonds, for four iron complexes using an experimentally based theoretical model. Kα RIXS involves resonant 1s→3d excitation and detection of the 2p→1s (Kα) emission. This two-photon process reaches similar final states as single-photon L-edge (2p→3d) X-ray absorption spectroscopy (XAS), but involves only hard X-rays and can therefore be used to get high-resolution L-edge-like spectra for metal proteins, solution catalysts and their intermediates. To analyze the information content of Kα RIXS spectra, data have been collected for four characteristic σ-donor and π-back-donation complexes: ferrous tacn [Fe(II)(tacn)2]Br2, ferrocyanide [Fe(II)(CN)6]K4, ferric tacn [Fe(III)(tacn)2]Br3 and ferricyanide [Fe(III)(CN)6]K3. From these spectra metal-ligand covalencies can be extracted using a charge-transfer multiplet model, without previous information from the L-edge XAS experiment. A direct comparison of L-edge XAS and Kα RIXS spectra show that the latter reaches additional final states, e.g., when exciting into the e(g) (σ*) orbitals, and the splitting between final states of different symmetry provides an extra dimension that makes Kα RIXS a more sensitive probe of σ-bonding. Another key difference between L-edge XAS and Kα RIXS is the π-back-bonding features in ferro- and ferricyanide that are significantly more intense in L-edge XAS compared to Kα RIXS. This shows that two methods are complementary in assigning electronic structure. The Kα RIXS approach can thus be used as a stand-alone method, in combination with L-edge XAS for strongly covalent systems that are difficult to probe by UV/vis spectroscopy, or as an extension to conventional absorption spectroscopy for a wide range of transition metal enzymes and catalysts.
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Affiliation(s)
- Marcus Lundberg
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Thomas Kroll
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | - Serena DeBeer
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA 94025, USA
| | - Uwe Bergmann
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA 94025, USA
| | - Samuel A. Wilson
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
| | | | - Dennis Nordlund
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA 94025, USA
| | - Britt Hedman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA 94025, USA
| | - Keith O. Hodgson
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA 94025, USA
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, CA 94305, USA
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA 94025, USA
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31
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Mitzner R, Rehanek J, Kern J, Gul S, Hattne J, Taguchi T, Alonso-Mori R, Tran R, Weniger C, Schröder H, Quevedo W, Laksmono H, Sierra RG, Han G, Lassalle-Kaiser B, Koroidov S, Kubicek K, Schreck S, Kunnus K, Brzhezinskaya M, Firsov A, Minitti MP, Turner JJ, Moeller S, Sauter NK, Bogan MJ, Nordlund D, Schlotter WF, Messinger J, Borovik A, Techert S, de Groot FMF, Föhlisch A, Erko A, Bergmann U, Yachandra VK, Wernet P, Yano J. L-Edge X-ray Absorption Spectroscopy of Dilute Systems Relevant to Metalloproteins Using an X-ray Free-Electron Laser. J Phys Chem Lett 2013; 4:3641-3647. [PMID: 24466387 PMCID: PMC3901369 DOI: 10.1021/jz401837f] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
L-edge spectroscopy of 3d transition metals provides important electronic structure information and has been used in many fields. However, the use of this method for studying dilute aqueous systems, such as metalloenzymes, has not been prevalent because of severe radiation damage and the lack of suitable detection systems. Here we present spectra from a dilute Mn aqueous solution using a high-transmission zone-plate spectrometer at the Linac Coherent Light Source (LCLS). The spectrometer has been optimized for discriminating the Mn L-edge signal from the overwhelming O K-edge background that arises from water and protein itself, and the ultrashort LCLS X-ray pulses can outrun X-ray induced damage. We show that the deviations of the partial-fluorescence yield-detected spectra from the true absorption can be well modeled using the state-dependence of the fluorescence yield, and discuss implications for the application of our concept to biological samples.
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Affiliation(s)
- Rolf Mitzner
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Jens Rehanek
- Institute for Nanometre Optics and Technology, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Jan Kern
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Sheraz Gul
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Johan Hattne
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Taketo Taguchi
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
| | - Roberto Alonso-Mori
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Rosalie Tran
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Christian Weniger
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Henning Schröder
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
- Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany
| | - Wilson Quevedo
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Hartawan Laksmono
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Raymond G. Sierra
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Guangye Han
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Benedikt Lassalle-Kaiser
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Sergey Koroidov
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, 901 87 Umeå, Sweden
| | - Katharina Kubicek
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
- Structural Dynamics of (Bio)Chemical Systems, Deutsches Elektronen-Synchtrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany
| | - Simon Schreck
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
- Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany
| | - Kristjan Kunnus
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
- Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany
| | - Maria Brzhezinskaya
- Institute for Nanometre Optics and Technology, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Alexander Firsov
- Institute for Nanometre Optics and Technology, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Michael P. Minitti
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Joshua J. Turner
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Stefan Moeller
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Nicholas K. Sauter
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Michael J. Bogan
- Stanford PULSE Institute, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Dennis Nordlund
- SSRL, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - William F. Schlotter
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Johannes Messinger
- Institutionen för Kemi, Kemiskt Biologiskt Centrum, Umeå Universitet, 901 87 Umeå, Sweden
| | - Andrew Borovik
- Department of Chemistry, University of California-Irvine, 1102 Natural Sciences II, Irvine, California 92697, United States
| | - Simone Techert
- Structural Dynamics of (Bio)Chemical Systems, Deutsches Elektronen-Synchtrotron (DESY), Notkestrasse 85, 22607 Hamburg, Germany
- Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
| | - Frank M. F. de Groot
- Inorganic Chemistry and Catalysis, Utrecht University, 3584 CG Utrecht, The Netherlands
| | - Alexander Föhlisch
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
- Institut für Physik und Astronomie, Universität Potsdam, 14476 Potsdam, Germany
| | - Alexei Erko
- Institute for Nanometre Optics and Technology, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Uwe Bergmann
- LCLS, SLAC National Accelerator Laboratory, Menlo Park, California 94025, United States
| | - Vittal K. Yachandra
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
| | - Philippe Wernet
- Institute for Methods and Instrumentation for Synchrotron Radiation Research, Helmholtz-Zentrum Berlin für Materialien und Energie GmbH, 12489 Berlin, Germany
| | - Junko Yano
- Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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32
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Bernadotte S, Atkins AJ, Jacob CR. Origin-independent calculation of quadrupole intensities in X-ray spectroscopy. J Chem Phys 2013. [PMID: 23205980 DOI: 10.1063/1.4766359] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
For electronic excitations in the ultraviolet and visible range of the electromagnetic spectrum, the intensities are usually calculated within the dipole approximation, which assumes that the oscillating electric field is constant over the length scale of the transition. For the short wavelengths used in hard X-ray spectroscopy, the dipole approximation may not be adequate. In particular, for metal K-edge X-ray absorption spectroscopy (XAS), it becomes necessary to include higher-order contributions. In quantum-chemical approaches to X-ray spectroscopy, these so-called quadrupole intensities have so far been calculated by including contributions depending on the square of the electric-quadrupole and magnetic-dipole transition moments. However, the resulting quadrupole intensities depend on the choice of the origin of the coordinate system. Here, we show that for obtaining an origin-independent theory, one has to include all contributions that are of the same order in the wave vector consistently. This leads to two additional contributions depending on products of the electric-dipole and electric-octupole and of the electric-dipole and magnetic-quadrupole transition moments, respectively. We have implemented such an origin-independent calculation of quadrupole intensities in XAS within time-dependent density-functional theory, and demonstrate its usefulness for the calculation of metal and ligand K-edge XAS spectra of transition metal complexes.
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Affiliation(s)
- Stephan Bernadotte
- Karlsruhe Institute of Technology (KIT), Center for Functional Nanostructures, Wolfgang-Gaede-Str. 1a, 76131 Karlsruhe, Germany
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33
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Atkins AJ, Bauer M, Jacob CR. The chemical sensitivity of X-ray spectroscopy: high energy resolution XANES versus X-ray emission spectroscopy of substituted ferrocenes. Phys Chem Chem Phys 2013; 15:8095-105. [PMID: 23579736 DOI: 10.1039/c3cp50999k] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
X-ray spectroscopy at the metal K-edge is an important tool for understanding catalytic processes and provides insight into the geometric and electronic structures of transition metal complexes. In particular, X-ray emission-based methods such as high-energy resolution fluorescence detection (HERFD), X-ray absorption near-edge spectroscopy (XANES) and valence-to-core X-ray emission spectroscopy (V2C-XES) hold the promise of providing increased chemical sensitivity compared to conventional X-ray absorption spectroscopy. Here, we explore the ability of HERFD-XANES and V2C-XES spectroscopy to distinguish substitutions beyond the directly coordinated atoms for the example of ferrocene and selected ferrocene derivatives. The experimental spectra are assigned and interpreted through the use of density functional theory (DFT) calculations. We find that while the pre-edge peaks in the HERFD-XANES spectra are affected by substituents at the cyclopentadienyl ring containing π-bonds [A. J. Atkins, Ch. R. Jacob and M. Bauer, Chem.-Eur. J., 2012, 18, 7021], the V2C-XES spectra are virtually unchanged. The pre-edge in HERFD-XANES probes the weak transition to unoccupied metal d-orbitals, while the V2C-XES spectra are determined by dipole-allowed transitions from occupied ligand orbitals to the 1s core hole. The latter turn out to be less sensitive to changes beyond the first coordination shell.
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Affiliation(s)
- Andrew J Atkins
- Karlsruhe Institute of Technology (KIT), Center for Functional Nanostructures and Institute of Physical Chemistry, Wolfgang-Gaede-Str. 1a, 76131 Karlsruhe, Germany
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34
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Sakow D, Böker B, Brandhorst K, Burghaus O, Bröring M. 10-Heterocorroles: Ring-Contracted Porphyrinoids with Fine-Tuned Aromatic and Metal-Binding Properties. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201300757] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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35
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Sakow D, Böker B, Brandhorst K, Burghaus O, Bröring M. 10-Heterocorroles: Ring-Contracted Porphyrinoids with Fine-Tuned Aromatic and Metal-Binding Properties. Angew Chem Int Ed Engl 2013; 52:4912-5. [DOI: 10.1002/anie.201300757] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Revised: 03/04/2013] [Indexed: 11/06/2022]
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36
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Wilson SA, Kroll T, Decreau RA, Hocking RK, Lundberg M, Hedman B, Hodgson KO, Solomon EI. Iron L-edge X-ray absorption spectroscopy of oxy-picket fence porphyrin: experimental insight into Fe-O2 bonding. J Am Chem Soc 2013; 135:1124-36. [PMID: 23259487 PMCID: PMC3614349 DOI: 10.1021/ja3103583] [Citation(s) in RCA: 70] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The electronic structure of the Fe-O(2) center in oxy-hemoglobin and oxy-myoglobin is a long-standing issue in the field of bioinorganic chemistry. Spectroscopic studies have been complicated by the highly delocalized nature of the porphyrin, and calculations require interpretation of multideterminant wave functions for a highly covalent metal site. Here, iron L-edge X-ray absorption spectroscopy, interpreted using a valence bond configuration interaction multiplet model, is applied to directly probe the electronic structure of the iron in the biomimetic Fe-O(2) heme complex [Fe(pfp)(1-MeIm)O(2)] (pfp ("picket fence porphyrin") = meso-tetra(α,α,α,α-o-pivalamidophenyl)porphyrin or TpivPP). This method allows separate estimates of σ-donor, π-donor, and π-acceptor interactions through ligand-to-metal charge transfer and metal-to-ligand charge transfer mixing pathways. The L-edge spectrum of [Fe(pfp)(1-MeIm)O(2)] is further compared to those of [Fe(II)(pfp)(1-MeIm)(2)], [Fe(II)(pfp)], and [Fe(III)(tpp)(ImH)(2)]Cl (tpp = meso-tetraphenylporphyrin) which have Fe(II)S = 0, Fe(II)S = 1, and Fe(III)S = 1/2 ground states, respectively. These serve as references for the three possible contributions to the ground state of oxy-pfp. The Fe-O(2) pfp site is experimentally determined to have both significant σ-donation and a strong π-interaction of the O(2) with the iron, with the latter having implications with respect to the spin polarization of the ground state.
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Affiliation(s)
- Samuel A. Wilson
- Department of Chemistry, Stanford University, Stanford, CA 94305, U.S.A
| | - Thomas Kroll
- Department of Chemistry, Stanford University, Stanford, CA 94305, U.S.A
| | | | | | - Marcus Lundberg
- Department of Chemistry, Stanford University, Stanford, CA 94305, U.S.A
| | - Britt Hedman
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA 94025-7015, U.S.A
| | - Keith O. Hodgson
- Department of Chemistry, Stanford University, Stanford, CA 94305, U.S.A
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA 94025-7015, U.S.A
| | - Edward I. Solomon
- Department of Chemistry, Stanford University, Stanford, CA 94305, U.S.A
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Stanford University, Menlo Park, CA 94025-7015, U.S.A
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37
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Palmer JH, Lancaster KM. Molecular redox: revisiting the electronic structures of the group 9 metallocorroles. Inorg Chem 2012; 51:12473-82. [PMID: 23116160 DOI: 10.1021/ic3018826] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The electronic structures of monocationic tris[(5,10,15-pentafluorophenyl)-corrolato]iridium compounds, [Ir(tpfc)L2](+), where L = 4-cyanopyridine [1](+), pyridine [2](+), 4-methoxypyridine [3](+), or 4-(N,N'-dimethylamino)pyridine [4](+), have been probed by electron paramagnetic resonance (EPR) spectroscopy, Ir L3,2-edge X-ray absorption spectroscopy (XAS), UV/visible (UV-vis) spectroelectrochemistry, and density functional theoretical (DFT) calculations. The data demonstrate that these complexes, which have been previously formulated as either of the limiting cases [Ir(III)(tpfc(•))L2](+) or [Ir(IV)(tpfc)L2](+), are best described as possessing a singly occupied molecular orbital (SOMO) dominated by tpfc with small but significant Ir admixture. EPR g-values and electronic absorption spectra are reproduced well using a simple DFT approach. These quantities depend profoundly upon Ir orbital contribution to the SOMO. To wit, the calculated Ir spin population ranges from 10.6% for [1](+) to 16.3% for [4](+), reflecting increased Ir d mixing into the SOMO with increasingly electron-rich axial ligation. This gives rise to experimentally measured gz values ranging from 2.335 to 2.533, metal-to-ligand charge transfer (MLCT) bands ranging from 14730 and 14330 cm(-1), and [Ir(tpfc)L2](+/0) reduction potentials ranging from 0.305 to 0.035 V vs Fc(+/0). In addition, the calculated Ir character in the SOMO tracks with estimated Ir L3,2 XAS branching ratios (EBR), reflecting the increasing degree of Ir d orbital character upon proceeding from [1](+) to [4](+).
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Affiliation(s)
- Joshua H Palmer
- Beckman Institute , California Institute of Technology, Pasadena, California 91125, United States
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38
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Hocking RK, Gates WP, Cashion JD. Comment on "direct observation of tetrahedrally coordinated Fe(III) in ferrihydrite". ENVIRONMENTAL SCIENCE & TECHNOLOGY 2012; 46:11471-11474. [PMID: 22967048 DOI: 10.1021/es303084e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Affiliation(s)
- Rosalie K Hocking
- School of Pharmacy and Molecular Science, James Cook University, Townsville, QLD, 4811, Australia.
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39
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Tanabe M, Matsuoka H, Ohba Y, Yamauchi S, Sugisaki K, Toyota K, Sato K, Takui T, Goldberg I, Saltsman I, Gross Z. Time-Resolved Electron Paramagnetic Resonance and Phosphorescence Studies of the Lowest Excited Triplet States of Rh(III) Corrole Complexes. J Phys Chem A 2012; 116:9662-73. [DOI: 10.1021/jp3071037] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Mana Tanabe
- Institute of Multidisciplinary Research for
Advanced Materials, Tohoku University,
Sendai 980-8577, Japan
| | - Hideto Matsuoka
- Institute of Multidisciplinary Research for
Advanced Materials, Tohoku University,
Sendai 980-8577, Japan
| | - Yasunori Ohba
- Institute of Multidisciplinary Research for
Advanced Materials, Tohoku University,
Sendai 980-8577, Japan
| | - Seigo Yamauchi
- Institute of Multidisciplinary Research for
Advanced Materials, Tohoku University,
Sendai 980-8577, Japan
| | - Kenji Sugisaki
- Department of Chemistry, Graduate School
of Science, Osaka City University, Osaka
558-8585, Japan
| | - Kazuo Toyota
- Department of Chemistry, Graduate School
of Science, Osaka City University, Osaka
558-8585, Japan
| | - Kazunobu Sato
- Department of Chemistry, Graduate School
of Science, Osaka City University, Osaka
558-8585, Japan
| | - Takeji Takui
- Department of Chemistry, Graduate School
of Science, Osaka City University, Osaka
558-8585, Japan
| | - Israel Goldberg
- School of Chemistry, Tel Aviv University, Tel Aviv 69978, Israel
| | - Irena Saltsman
- Schulich
Faculty of Chemistry, Technion, Israel Institute of Technology, Haifa 32000, Israel
| | - Zeev Gross
- Schulich
Faculty of Chemistry, Technion, Israel Institute of Technology, Haifa 32000, Israel
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40
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Leidel N, Chernev P, Havelius KGV, Schwartz L, Ott S, Haumann M. Electronic Structure of an [FeFe] Hydrogenase Model Complex in Solution Revealed by X-ray Absorption Spectroscopy Using Narrow-Band Emission Detection. J Am Chem Soc 2012; 134:14142-57. [DOI: 10.1021/ja304970p] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Nils Leidel
- Institut für Experimentalphysik, Freie Universität Berlin, 14195 Berlin, Germany
| | - Petko Chernev
- Institut für Experimentalphysik, Freie Universität Berlin, 14195 Berlin, Germany
| | - Kajsa G. V. Havelius
- Institut für Experimentalphysik, Freie Universität Berlin, 14195 Berlin, Germany
| | - Lennart Schwartz
- Department of Chemistry, Uppsala University, Ångström Laboratories,
75120 Uppsala, Sweden
| | - Sascha Ott
- Department of Chemistry, Uppsala University, Ångström Laboratories,
75120 Uppsala, Sweden
| | - Michael Haumann
- Institut für Experimentalphysik, Freie Universität Berlin, 14195 Berlin, Germany
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41
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Cho K, Leeladee P, McGown AJ, DeBeer S, Goldberg DP. A high-valent iron-oxo corrolazine activates C-H bonds via hydrogen-atom transfer. J Am Chem Soc 2012; 134:7392-9. [PMID: 22489757 DOI: 10.1021/ja3018658] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Oxidation of the Fe(III) complex (TBP(8)Cz)Fe(III) [TBP(8)Cz = octakis(4-tert-butylphenyl)corrolazinate] with O-atom transfer oxidants under a variety of conditions gives the reactive high-valent Fe(O) complex (TBP(8)Cz(+•))Fe(IV)(O) (2). The solution state structure of 2 was characterized by XAS [d(Fe-O) = 1.64 Å]. This complex is competent to oxidize a range of C-H substrates. Product analyses and kinetic data show that these reactions occur via rate-determining hydrogen-atom transfer (HAT), with a linear correlation for log k versus BDE(C-H), and the following activation parameters for xanthene (Xn) substrate: ΔH(++) = 12.7 ± 0.8 kcal mol(-1), ΔS(++) = -9 ± 3 cal K(-1) mol(-1), and KIE = 5.7. Rebound hydroxylation versus radical dimerization for Xn is favored by lowering the reaction temperature. These findings provide insights into the factors that control the intrinsic reactivity of Compound I heme analogues.
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Affiliation(s)
- Kevin Cho
- Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, Maryland 21218, USA
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42
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Yang Y, Jones D, von Haimberger T, Linke M, Wagnert L, Berg A, Levanon H, Zacarias A, Mahammed A, Gross Z, Heyne K. Assignment of Aluminum Corroles Absorption Bands to Electronic Transitions by Femtosecond Polarization Resolved VIS-Pump IR-Probe Spectroscopy. J Phys Chem A 2012; 116:1023-9. [DOI: 10.1021/jp211970j] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Yang Yang
- Department of Physics, Freie Universitaet Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Dagmar Jones
- Department of Physics, Freie Universitaet Berlin, Arnimallee 14, 14195 Berlin, Germany
| | | | - Martin Linke
- Department of Physics, Freie Universitaet Berlin, Arnimallee 14, 14195 Berlin, Germany
| | - Linn Wagnert
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Alexander Berg
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Haim Levanon
- Institute of Chemistry, The Hebrew University of Jerusalem, Jerusalem 91904, Israel
| | - Angelica Zacarias
- Department of Physics, Freie Universitaet Berlin, Arnimallee 14, 14195 Berlin, Germany
- Max-Planck-Institut fuer Mikrostrukturphysik and European Theoretical Spectroscopy Facility (ETSF), Weinberg 2, 06120 Halle, Germany
| | - Atif Mahammed
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Zeev Gross
- Schulich Faculty of Chemistry, Technion-Israel Institute of Technology, Haifa 32000, Israel
| | - Karsten Heyne
- Department of Physics, Freie Universitaet Berlin, Arnimallee 14, 14195 Berlin, Germany
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43
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Rashidi M, Müllegger S, Roithner M, Schöfberger W, Koch R. Spectroscopic scanning tunneling microscopy studies of single surface-supported free-base corroles. J Am Chem Soc 2012; 134:91-4. [PMID: 22188437 PMCID: PMC3261638 DOI: 10.1021/ja209225f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Indexed: 11/30/2022]
Abstract
Corroles are versatile chemically active agents in solution. Expanding their applications toward surface-supported systems requires a fundamental knowledge of corrole-surface interactions. We employed the tip of a low-temperature scanning tunneling microscope as local probe to investigate at the single-molecule level the electronic and geometric properties of surface-supported free-base corrole molecules. To provide a suitable reference for other corrole-based systems on surfaces, we chose the archetypal 5,10,15-tris(pentafluorophenyl)corrole [H(3)(TpFPC)] as model system, weakly adsorbed on two surfaces with different interaction strengths. We demonstrate the nondissociative adsorption of H(3)(TpFPC) on pristine Au(111) and on an intermediate organic layer that provides sufficient electronic decoupling to investigate geometric and frontier orbital electronic properties of almost undisturbed H(3)(TpFPC) molecules at the submolecular level. We identify a deviating adsorption behavior of H(3)(TpFPC) compared to structurally similar porphyrins, characterized by a chiral pair of molecule-substrate configurations.
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Affiliation(s)
- Mohammad Rashidi
- Institute
of Semiconductor and Solid State Physics and Institute of Inorganic Chemistry, Johannes Kepler University Linz, 4040 Linz, Austria
| | - Stefan Müllegger
- Institute
of Semiconductor and Solid State Physics and Institute of Inorganic Chemistry, Johannes Kepler University Linz, 4040 Linz, Austria
| | - Manuel Roithner
- Institute
of Semiconductor and Solid State Physics and Institute of Inorganic Chemistry, Johannes Kepler University Linz, 4040 Linz, Austria
| | - Wolfgang Schöfberger
- Institute
of Semiconductor and Solid State Physics and Institute of Inorganic Chemistry, Johannes Kepler University Linz, 4040 Linz, Austria
| | - Reinhold Koch
- Institute
of Semiconductor and Solid State Physics and Institute of Inorganic Chemistry, Johannes Kepler University Linz, 4040 Linz, Austria
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Yamauchi S, Tanabe M, Ohba Y, Sugisaki K, Toyota K, Sato K, Takui T, Saltsman I. Complete assignment of spin sublevels in the lowest excited triplet state of corrole compounds by time-resolved EPR spectroscopy. Chem Phys Lett 2012. [DOI: 10.1016/j.cplett.2011.11.040] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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45
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Rokob TA, Srnec M, Rulíšek L. Theoretical calculations of physico-chemical and spectroscopic properties of bioinorganic systems: current limits and perspectives. Dalton Trans 2012; 41:5754-68. [DOI: 10.1039/c2dt12423h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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46
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Rajapandian V, Subramanian V. Calculations on the Structure and Spectral Properties of Cytochrome c551 Using DFT and ONIOM Methods. J Phys Chem A 2011; 115:2866-76. [DOI: 10.1021/jp110983v] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- V. Rajapandian
- Chemical Laboratory, Central Leather Research Institute, Council of Scientific and Industrial Research, Adyar, Chennai 600 020, India
| | - V. Subramanian
- Chemical Laboratory, Central Leather Research Institute, Council of Scientific and Industrial Research, Adyar, Chennai 600 020, India
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47
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Stefanelli M, Nardis S, Tortora L, Fronczek FR, Smith KM, Licoccia S, Paolesse R. Nitration of iron corrolates: further evidence for non-innocence of the corrole ligand. Chem Commun (Camb) 2011; 47:4255-7. [PMID: 21380423 DOI: 10.1039/c0cc05491g] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mono- and di-substituted β-nitro derivatives have been obtained from the reaction of ttcorrFeCl with sodium nitrite in refluxing DMF. This result is unprecedented for iron corrolates and further evidences the non-innocent character of the corrole ligand.
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Affiliation(s)
- Manuela Stefanelli
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica 1, 00133 Rome, Italy
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48
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Transition Metal Corrole Coordination Chemistry. MOLECULAR ELECTRONIC STRUCTURES OF TRANSITION METAL COMPLEXES I 2011. [DOI: 10.1007/430_2011_52] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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49
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Ligand Field and Molecular Orbital Theories of Transition Metal X-ray Absorption Edge Transitions. MOLECULAR ELECTRONIC STRUCTURES OF TRANSITION METAL COMPLEXES I 2011. [DOI: 10.1007/430_2011_60] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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50
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Gisk B, Brégier F, Krüger RA, Bröring M, Frankenberg-Dinkel N. Enzymatic Ring Opening of an Iron Corrole by Plant-Type Heme Oxygenases: Unexpected Substrate and Protein Selectivities. Biochemistry 2010; 49:10042-4. [DOI: 10.1021/bi1014369] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Björn Gisk
- Physiology of Microorganisms, Ruhr-University Bochum, 44780 Bochum, Germany
| | | | - Robin A. Krüger
- Fachbereich Chemie, Philipps-University Marburg, 35032 Marburg, Germany
| | - Martin Bröring
- Fachbereich Chemie, Philipps-University Marburg, 35032 Marburg, Germany
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