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Kim Y, Kim J, Nguyen LK, Lee YM, Nam W, Kim SH. EPR spectroscopy elucidates the electronic structure of [FeV(O)(TAML)] complexes. Inorg Chem Front 2021. [DOI: 10.1039/d1qi00522g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The complete hyperfine tensor of 17O of the FeV-oxo moeity was probed by ENDOR spectroscopy. The EPR spectroscopic results reported here provide a conclusive experimental basis for elucidating the electronic structure of the FeV-oxo complex.
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Affiliation(s)
- Yujeong Kim
- Western Seoul Center
- Korea Basic Science Institute (KBSI)
- Seoul 03759
- Rep. of Korea
- Department of Chemistry and Nano Science
| | - Jin Kim
- Department of Chemistry
- Sunchon National University
- Suncheon 57922
- Rep. of Korea
| | - Linh K. Nguyen
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 03760
- Rep. of Korea
| | - Yong-Min Lee
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 03760
- Rep. of Korea
| | - Wonwoo Nam
- Department of Chemistry and Nano Science
- Ewha Womans University
- Seoul 03760
- Rep. of Korea
| | - Sun Hee Kim
- Western Seoul Center
- Korea Basic Science Institute (KBSI)
- Seoul 03759
- Rep. of Korea
- Department of Chemistry and Nano Science
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2
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Somasundar Y, Shen LQ, Hoane AG, Kaaret EZ, Warner GR, Ryabov AD, Collins TJ. Predicting Properties of Iron(III) TAML Activators of Peroxides from Their III/IV and IV/V Reduction Potentials or a Lost Battle to Peroxidase. Chemistry 2020; 26:14738-14744. [DOI: 10.1002/chem.202003535] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/27/2020] [Indexed: 12/29/2022]
Affiliation(s)
- Yogesh Somasundar
- Institute for Green Science Department of Chemistry Carnegie Mellon University 4400 Fifth Ave Pittsburgh PA 15213 USA
| | | | - Alexis G. Hoane
- Institute for Green Science Department of Chemistry Carnegie Mellon University 4400 Fifth Ave Pittsburgh PA 15213 USA
| | - Evan Z. Kaaret
- Institute for Green Science Department of Chemistry Carnegie Mellon University 4400 Fifth Ave Pittsburgh PA 15213 USA
| | - Genoa R. Warner
- Institute for Green Science Department of Chemistry Carnegie Mellon University 4400 Fifth Ave Pittsburgh PA 15213 USA
- Present address: Department of Comparative Biosciences University of Illinois 2001 S. Lincoln Avenue Urbana IL 61802 USA
| | - Alexander D. Ryabov
- Institute for Green Science Department of Chemistry Carnegie Mellon University 4400 Fifth Ave Pittsburgh PA 15213 USA
| | - Terrence J. Collins
- Institute for Green Science Department of Chemistry Carnegie Mellon University 4400 Fifth Ave Pittsburgh PA 15213 USA
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3
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Xue SS, Li XX, Lee YM, Seo MS, Kim Y, Yanagisawa S, Kubo M, Jeon YK, Kim WS, Sarangi R, Kim SH, Fukuzumi S, Nam W. Enhanced Redox Reactivity of a Nonheme Iron(V)-Oxo Complex Binding Proton. J Am Chem Soc 2020; 142:15305-15319. [PMID: 32786748 DOI: 10.1021/jacs.0c05108] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Acid effects on the chemical properties of metal-oxygen intermediates have attracted much attention recently, such as the enhanced reactivity of high-valent metal(IV)-oxo species by binding proton(s) or Lewis acidic metal ion(s) in redox reactions. Herein, we report for the first time the proton effects of an iron(V)-oxo complex bearing a negatively charged tetraamido macrocyclic ligand (TAML) in oxygen atom transfer (OAT) and electron-transfer (ET) reactions. First, we synthesized and characterized a mononuclear nonheme Fe(V)-oxo TAML complex (1) and its protonated iron(V)-oxo complexes binding two and three protons, which are denoted as 2 and 3, respectively. The protons were found to bind to the TAML ligand of the Fe(V)-oxo species based on spectroscopic characterization, such as resonance Raman, extended X-ray absorption fine structure (EXAFS), and electron paramagnetic resonance (EPR) measurements, along with density functional theory (DFT) calculations. The two-protons binding constant of 1 to produce 2 and the third protonation constant of 2 to produce 3 were determined to be 8.0(7) × 108 M-2 and 10(1) M-1, respectively. The reactivities of the proton-bound iron(V)-oxo complexes were investigated in OAT and ET reactions, showing a dramatic increase in the rate of sulfoxidation of thioanisole derivatives, such as 107 times increase in reactivity when the oxidation of p-CN-thioanisole by 1 was performed in the presence of HOTf (i.e., 200 mM). The one-electron reduction potential of 2 (Ered vs SCE = 0.97 V) was significantly shifted to the positive direction, compared to that of 1 (Ered vs SCE = 0.33 V). Upon further addition of a proton to a solution of 2, a more positive shift of the Ered value was observed with a slope of 47 mV/log([HOTf]). The sulfoxidation of thioanisole derivatives by 2 was shown to proceed via ET from thioanisoles to 2 or direct OAT from 2 to thioanisoles, depending on the ET driving force.
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Affiliation(s)
- Shan-Shan Xue
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Xiao-Xi Li
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Yong-Min Lee
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Mi Sook Seo
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Yujeong Kim
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea.,Western Seoul Center, Korea Basic Science Institute, Seoul 03759, Korea
| | - Sachiko Yanagisawa
- Graduate School of Life Science, University of Hyogo, Hyogo 678-1297, Japan
| | - Minoru Kubo
- Graduate School of Life Science, University of Hyogo, Hyogo 678-1297, Japan
| | - Young-Kyo Jeon
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Won-Suk Kim
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Ritimukta Sarangi
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, California 94025, United States
| | - Sun Hee Kim
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea.,Western Seoul Center, Korea Basic Science Institute, Seoul 03759, Korea
| | - Shunichi Fukuzumi
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea
| | - Wonwoo Nam
- Department of Chemistry and Nano Science, Ewha Womans University, Seoul 03760, Korea.,School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, P. R. China
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4
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Li S, Wang L, Zhou R, Zhou C, Du H. Synthesis of a simplified iron(III) tetraamido macrocyclic ligand (Fe III-TAML) catalyst and its catalytic activity for degradation of dye wastewater by H 2O 2. J COORD CHEM 2020. [DOI: 10.1080/00958972.2019.1710138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Shunlai Li
- College of Chemistry, Beijing University of Chemical Technology, Beijing, China
| | - Liaoyuan Wang
- College of Chemistry, Beijing University of Chemical Technology, Beijing, China
| | - Run Zhou
- College of Chemistry, Beijing University of Chemical Technology, Beijing, China
| | - Cheng Zhou
- College of Chemistry, Beijing University of Chemical Technology, Beijing, China
| | - Hongguang Du
- College of Chemistry, Beijing University of Chemical Technology, Beijing, China
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5
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Warner GR, Somasundar Y, Jansen KC, Kaaret EZ, Weng C, Burton AE, Mills MR, Shen LQ, Ryabov AD, Pros G, Pintauer T, Biswas S, Hendrich MP, Taylor JA, Vom Saal FS, Collins TJ. Bioinspired, Multidisciplinary, Iterative Catalyst Design Creates the Highest Performance Peroxidase Mimics and the Field of Sustainable Ultradilute Oxidation Catalysis (SUDOC). ACS Catal 2019. [DOI: 10.1021/acscatal.9b01409] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Genoa R. Warner
- Institute for Green Science, Department of Chemistry, 4400 Fifth Avenue, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Yogesh Somasundar
- Institute for Green Science, Department of Chemistry, 4400 Fifth Avenue, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Kyle C. Jansen
- Institute for Green Science, Department of Chemistry, 4400 Fifth Avenue, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Evan Z. Kaaret
- Institute for Green Science, Department of Chemistry, 4400 Fifth Avenue, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Cindy Weng
- Institute for Green Science, Department of Chemistry, 4400 Fifth Avenue, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Abigail E. Burton
- Institute for Green Science, Department of Chemistry, 4400 Fifth Avenue, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Matthew R. Mills
- Institute for Green Science, Department of Chemistry, 4400 Fifth Avenue, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Longzhu Q. Shen
- University of Cambridge, Downing Street, Cambridge CB2 3EJ, United Kingdom
| | - Alexander D. Ryabov
- Institute for Green Science, Department of Chemistry, 4400 Fifth Avenue, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Gabrielle Pros
- Department of Chemistry and Biochemistry, 600 Forbes Avenue, Duquesne University, Pittsburgh, Pennsylvania 15282, United States
| | - Tomislav Pintauer
- Department of Chemistry and Biochemistry, 600 Forbes Avenue, Duquesne University, Pittsburgh, Pennsylvania 15282, United States
| | - Saborni Biswas
- Institute for Green Science, Department of Chemistry, 4400 Fifth Avenue, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Michael P. Hendrich
- Institute for Green Science, Department of Chemistry, 4400 Fifth Avenue, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
| | - Julia A. Taylor
- Division of Biological Sciences, University of Missouri, Columbia, Missouri 65211, United States
| | - Frederick S. Vom Saal
- Division of Biological Sciences, University of Missouri, Columbia, Missouri 65211, United States
| | - Terrence J. Collins
- Institute for Green Science, Department of Chemistry, 4400 Fifth Avenue, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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6
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Weitz AC, Mills MR, Ryabov AD, Collins TJ, Guo Y, Bominaar EL, Hendrich MP. A Synthetically Generated LFe IVOH n Complex. Inorg Chem 2019; 58:2099-2108. [PMID: 30667223 DOI: 10.1021/acs.inorgchem.8b03200] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
High-valent Fe-OH species are important intermediates in hydroxylation chemistry. Such complexes have been implicated in mechanisms of oxygen-activating enzymes and have thus far been observed in Compound II of sulfur-ligated heme enzymes like cytochrome P450. Attempts to synthetically model such species have thus far seen relatively little success. Here, the first synthetic FeIVOH n complex has been generated and spectroscopically characterized as either [LFeIVOH]- or [LFeIVOH2]0, where H4L = Me4C2(NHCOCMe2NHCO)2CMe2 is a variant of a tetra-amido macrocyclic ligand (TAML). The steric bulk provided by the replacement of the aryl group with the -CMe2CMe2- unit in this TAML variant prevents dimerization in all oxidation states over a wide pH range, thus allowing the generation of FeIVOH n in near quantitative yield from oxidation of the [LFeIIIOH2]- precursor.
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Affiliation(s)
- Andrew C Weitz
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Matthew R Mills
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Alexander D Ryabov
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Terrence J Collins
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Yisong Guo
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Emile L Bominaar
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
| | - Michael P Hendrich
- Department of Chemistry , Carnegie Mellon University , 4400 Fifth Avenue , Pittsburgh , Pennsylvania 15213 , United States
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7
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Ellis WC, Ryabov AD, Fischer A, Hayden JA, Shen LQ, Bominaar EL, Hendrich MP, Collins TJ. Bis phenylene flattened 13-membered tetraamide macrocyclic ligand (TAML) for square planar cobalt(III). J COORD CHEM 2018; 71:1822-1836. [PMID: 31249429 DOI: 10.1080/00958972.2018.1487060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Abstract
The preparation, characterization, and evaluation of a cobalt(III) complex with 13-membered tetraamide macrocyclic ligand (TAML) is described. This is a square-planar (X-ray) S = 1 paramagnetic (1H NMR) compound, which becomes an S = 0 diamagnetic octahedral species in excess d5-pyridine. Its one-electron oxidation at an electrode is fully reversible with the lowest E 1/2 value (0.66 V vs SCE) among all investigated CoIII TAML complexes. The oxidation results in a neutral blue species which is consistent with a CoIII/radical-cation ligand. The ease of oxidation is likely due to the two benzene rings incorporated in the ligand structure (whereas there is just one in many other CoIII TAMLs). The oxidized neutral species are unexpectedly EPR silent, presumably due to the π-stacking aggregation. However, they display eight-line hyperfine patterns in the presence of excess of 4-tert-butylpyridine or 4-tert-butyl isonitrile. The EPR spectra are more consistent with the CoIII/radical-cation ligand formulation rather than with a CoIV complex. Attempts to synthesize a similar vanadium complex under the same conditions as for cobalt using [VVO(OCHMe2)3] were not successful. TAML-free decavanadate was isolated instead.
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Affiliation(s)
- W Chadwick Ellis
- Department of Chemistry, Carnegie Mellon university, Pittsburgh, PA, USA
| | - Alexander D Ryabov
- Department of Chemistry, Carnegie Mellon university, Pittsburgh, PA, USA
| | - Andreas Fischer
- Inorganic Chemistry, department of Chemistry, Royal institute of Technology, Stockholm, Sweden
| | - Joshua A Hayden
- Department of Chemistry, Carnegie Mellon university, Pittsburgh, PA, USA
| | - Longzhu Q Shen
- Department of Chemistry, Carnegie Mellon university, Pittsburgh, PA, USA
| | - Emile L Bominaar
- Department of Chemistry, Carnegie Mellon university, Pittsburgh, PA, USA
| | - Michael P Hendrich
- Department of Chemistry, Carnegie Mellon university, Pittsburgh, PA, USA
| | - Terrence J Collins
- Department of Chemistry, Carnegie Mellon university, Pittsburgh, PA, USA
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