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Liu Q, Ren W, Zhang S, Huang Y, Chen D, Zeng W, Zhou Z, He L, Guo W, Li J. d‐Orbital Reconstructions Forced by Double Bow‐Shaped Deformations and Second Coordination Sphere Effects of Cu(II) Heme Analogs in HER**. Chemistry 2022; 28:e202103892. [DOI: 10.1002/chem.202103892] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Indexed: 11/11/2022]
Affiliation(s)
- Qiuhua Liu
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule Ministry of Education and School of Chemistry and Chemical Engineering Institution for Hunan University of Science and Technology Yuhu District Xiangtan 411201 P. R. China
| | - Wanjie Ren
- College of Materials Science and Optoelectronic Technology University of Chinese Academy of Sciences Yanqi Lake, Huairou District Beijing 101408 P. R. China
| | - Siwei Zhang
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule Ministry of Education and School of Chemistry and Chemical Engineering Institution for Hunan University of Science and Technology Yuhu District Xiangtan 411201 P. R. China
| | - Yang Huang
- State Key Laboratory for Oxo Synthesis and Selective Oxidation Suzhou Research Institute of LICP Institution for Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences Lanzhou 730000 P. R. China
| | - Dilong Chen
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule Ministry of Education and School of Chemistry and Chemical Engineering Institution for Hunan University of Science and Technology Yuhu District Xiangtan 411201 P. R. China
| | - Wennan Zeng
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule Ministry of Education and School of Chemistry and Chemical Engineering Institution for Hunan University of Science and Technology Yuhu District Xiangtan 411201 P. R. China
| | - Zaichun Zhou
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecule Ministry of Education and School of Chemistry and Chemical Engineering Institution for Hunan University of Science and Technology Yuhu District Xiangtan 411201 P. R. China
| | - Lin He
- State Key Laboratory for Oxo Synthesis and Selective Oxidation Suzhou Research Institute of LICP Institution for Lanzhou Institute of Chemical Physics (LICP) Chinese Academy of Sciences Lanzhou 730000 P. R. China
| | - Wenping Guo
- National Energy Center for Coal to Clean Fuels Synfuels China Company Ltd Huairou District Beijing 101400 P. R. China
| | - Jianfeng Li
- College of Materials Science and Optoelectronic Technology University of Chinese Academy of Sciences Yanqi Lake, Huairou District Beijing 101408 P. R. China
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Osadchuk I, Aav R, Borovkov V, Clot E. Chirogenesis in Zinc Porphyrins: Theoretical Evaluation of Electronic Transitions, Controlling Structural Factors and Axial Ligation. Chemphyschem 2021; 22:1817-1833. [PMID: 34213815 PMCID: PMC8457158 DOI: 10.1002/cphc.202100345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 06/24/2021] [Indexed: 12/15/2022]
Abstract
In the present work, sixteen different zinc porphyrins (possessing different meso substituents) with and without a chiral guest were modelled using DFT and TD-DFT approaches in order to understand the influence of various controlling factors on electronic circular dichroism (ECD) spectra. Two major aspects are influenced by these factors: excitation energy of the electronic transitions and their intensity. In the case of excitation energy, the influence increases in the following order: orientation of the peripheral substituents
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Affiliation(s)
- Irina Osadchuk
- Department of Chemistry and BiotechnologySchool of ScienceTallinn University of Technology AddressAkadeemia tee 1512618TallinnEstonia
- ICGMUniv MontpellierCNRS, ENSCMMontpellierFrance
| | - Riina Aav
- Department of Chemistry and BiotechnologySchool of ScienceTallinn University of Technology AddressAkadeemia tee 1512618TallinnEstonia
| | - Victor Borovkov
- Department of Chemistry and BiotechnologySchool of ScienceTallinn University of Technology AddressAkadeemia tee 1512618TallinnEstonia
| | - Eric Clot
- ICGMUniv MontpellierCNRS, ENSCMMontpellierFrance
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3
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Chen CC, Wu YW, Nakamura M, Cheng RJ, Tseng TH, Chen PPY. Assessment of the intramolecular magnetic interactions in the highly saddled iron(iii) porphyrin π-radical cations: the change from planar to saddle conformations. Dalton Trans 2019; 48:13820-13833. [PMID: 31482912 DOI: 10.1039/c9dt02714a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The intramolecular magnetic interactions in one-electron oxidized iron(iii) porphyrin π-radical cations, [Fe(OETPP˙)Cl][SbCl6] (1), [Fe(OMTPP˙)Cl][SbCl6] (2) and [Fe(TPP˙)Cl][SbCl6] (3), have been compared by means of X-ray crystallography, SQUID magnetometry, cyclic voltammetry, UV-Vis spectroelectrochemical analysis, NMR spectroscopy analysis and unrestricted DFT calculations. Unlike a generally recognized antiferromagnetic coupling dxy↑dxz↑dyz↑dz2↑dx2-y2↑P˙+(a2u)↓ (S = 2) state via a weak bonding interaction as in (3), we have disclosed that a strong bonding interaction among iron dx2-y2 and porphyrin a2u orbitals forms in (1) into a highly delocalized Ψπ = [P˙+(a2u) + FeIII(dx2-y2, dz2)] orbital that is able to accommodate two spin-paired electrons to form the Ψπ2dxy1dxz1dyz1, dz21 (S = 2) ground state. Concurrently, the spin polarization effect is exerted on the paired spins in the Ψπ orbital by magnetic induction from the remaining unpaired electrons in the iron d orbitals. The interpretation mentioned above is further verified by the diamagnetic nature of the saddled copper(ii) porphyrin π-cation radical, CuII(OETPP˙)(ClO4) (S = 0), where the strong bonding interaction leads to the Ψπ2dxy2dxz2dyz2dz22 (S = 0) ground state but no spin polarization exists. Thus, the magnetic nature of the iron(iii) porphyrin π-radical cation is tuneable by saddling the ring planarity.
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Affiliation(s)
- Ching-Chin Chen
- Department of Chemistry, National Chung Hsing University, 145 Xingda Rd., South Dist., Taichung City 402, Taiwan.
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4
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Liu Q, Tang M, Zeng W, Zhang X, Wang J, Zhou Z. Optimal Size Matching and Minimal Distortion Energy: Implications for Natural Selection by the Macrocycle of the Iron Species in Heme. Eur J Inorg Chem 2016. [DOI: 10.1002/ejic.201600883] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Qiuhua Liu
- College of Chemistry and Chemical EngineeringCentral South University410083ChangshaChina
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules of the Ministry of EducationSchool of Chemistry and Chemical EngineeringHunan University of Science and Technology411201XiangtanChina
| | - Min Tang
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules of the Ministry of EducationSchool of Chemistry and Chemical EngineeringHunan University of Science and Technology411201XiangtanChina
| | - Wennan Zeng
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules of the Ministry of EducationSchool of Chemistry and Chemical EngineeringHunan University of Science and Technology411201XiangtanChina
| | - Xi Zhang
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules of the Ministry of EducationSchool of Chemistry and Chemical EngineeringHunan University of Science and Technology411201XiangtanChina
| | - Jianxiu Wang
- College of Chemistry and Chemical EngineeringCentral South University410083ChangshaChina
| | - Zaichun Zhou
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules of the Ministry of EducationSchool of Chemistry and Chemical EngineeringHunan University of Science and Technology411201XiangtanChina
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5
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Ikezaki A, Nakamura M. Effects of porphyrin deformation on the 13C and 1H NMR chemical shifts in high-spin five- and six-coordinate manganese(III) porphyrin complexes. J PORPHYR PHTHALOCYA 2016. [DOI: 10.1142/s1088424616500085] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
As an extension of our study to reveal the effect of porphyrin deformation on the [Formula: see text]C and 1H NMR chemical shifts, both five- and six-coordinate high-spin (S [Formula: see text] 2) Mn(III) complexes such as Mn(Por)Cl and [Mn(Por)(CD3OD)2]Cl have been prepared, where Por is a porphyrin dianion such as TPP, OMTPP, and T[Formula: see text]PrP. Molecular structures of five-coordinate Mn(OMTPP)Cl and Mn(TiPrP)Cl have been determined by the X-ray crystallographic analysis. As expected, Mn(OMTPP)Cl and Mn(TiPrP)Cl have exhibited a highly saddled and highly ruffled porphyrin core, respectively. The [Formula: see text]C NMR spectra have revealed that these complexes generally exhibit the [Formula: see text]-pyrrole signals at the downfield positions and [Formula: see text]-pyrrole an. meso signals at the upfield positions. The results suggest that the spin polarization of Mn(III)–NP σ bonds, which occurs in all the high-spin Mn(III) complexes, is the major factor to determine the chemical shifts of the porphyrin carbon signals (Cheng, R.-J.; Chang, S.-H.; Hung, K.-C. Inorg. Chem. 2007; 46: 1948–1950). Although th. meso and [Formula: see text]-pyrrole signals are observed at the upfield and downfield positions, respectively, these signals are widely dispersed depending on the deformation mode of the porphyrin ring. The results have been explained in terms of the strong spin polarization of the Mn–NP bond together with the specific metal-porphyrin orbital interactions such as: (i) the a2u-dz2 interaction in five-coordinate complexes, (ii) the a2u-dxy interaction in ruffled complexes, and (iii) the a2u-dx2-y2 interaction in saddled complexes.
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Affiliation(s)
- Akira Ikezaki
- Department of Chemistry, School of Medicine, Toho University, Ota-ku, Tokyo 143-8540, Japan
| | - Mikio Nakamura
- Department of Chemistry, Faculty of Science, Toho University, Funabashi, Chiba 274-8510, Japan
- Research Center for Materials with Integrated Properties, Toho University, Funabashi, 274-8510, Japan
- Toho University, Funabashi, Chiba 274-8510, Japan
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6
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Sil D, Bhowmik S, Khan FST, Rath SP. Experimental and Theoretical Investigation of a Series of Novel Dimanganese(III) μ-Hydroxo Bisporphyrins: Magneto–Structural Correlation and Effect of Metal Spin on Porphyrin Core Deformation. Inorg Chem 2016; 55:3239-51. [DOI: 10.1021/acs.inorgchem.5b02226] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Debangsu Sil
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Susovan Bhowmik
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | | | - Sankar Prasad Rath
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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7
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Liu Q, Zhang X, Zeng W, Wang J, Zhou Z. Fine-Tuning of Electronic Structure of Cobalt(II) Ion in Nonplanar Porphyrins and Tracking of a Cross-Hybrid Stage: Implications for the Distortion of Natural Tetrapyrrole Macrocycles. J Phys Chem B 2015; 119:14102-10. [DOI: 10.1021/acs.jpcb.5b08431] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Qiuhua Liu
- College
of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
- Key
Laboratory of Theoretical Organic Chemistry and Functional Molecule
of the Ministry of Education; School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Xi Zhang
- Key
Laboratory of Theoretical Organic Chemistry and Functional Molecule
of the Ministry of Education; School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Wennan Zeng
- Key
Laboratory of Theoretical Organic Chemistry and Functional Molecule
of the Ministry of Education; School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Jianxiu Wang
- College
of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China
| | - Zaichun Zhou
- Key
Laboratory of Theoretical Organic Chemistry and Functional Molecule
of the Ministry of Education; School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
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8
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Zhou Z, Zhou X, Liu Q, Zhang X, Liu H. Fixation of Zinc(II) Ion to Dioxygen in a Highly Deformed Porphyrin: Implications for the Oxygen Carrier Mechanism of Distorted Heme. Org Lett 2015; 17:4078-81. [DOI: 10.1021/acs.orglett.5b02010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zaichun Zhou
- Key Laboratory
of Theoretical
Organic Chemistry and Functional Molecule of the Ministry of Education,
School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Xiaochun Zhou
- Key Laboratory
of Theoretical
Organic Chemistry and Functional Molecule of the Ministry of Education,
School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Qiuhua Liu
- Key Laboratory
of Theoretical
Organic Chemistry and Functional Molecule of the Ministry of Education,
School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Xi Zhang
- Key Laboratory
of Theoretical
Organic Chemistry and Functional Molecule of the Ministry of Education,
School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
| | - Haomin Liu
- Key Laboratory
of Theoretical
Organic Chemistry and Functional Molecule of the Ministry of Education,
School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
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9
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Cheng RJ, Ting CH, Chao TC, Tseng TH, Chen PPY. The characterization of the saddle shaped nickel(iii) porphyrin radical cation: an explicative NMR model for a ferromagnetically coupled metallo-porphyrin radical. Chem Commun (Camb) 2014; 50:14265-8. [DOI: 10.1039/c4cc06993e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Ni(iii)(OETPP˙)(Br)2 is the first Ni(iii) porphyrin radical cation with structural and 1H and 13C paramagnetic NMR data for porphyrinate systems.
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Affiliation(s)
- Ru-Jen Cheng
- Department of Chemistry
- National Chung-Hsing University
- Taichung 402, Taiwan
| | - Chiao-Han Ting
- Department of Chemistry
- National Chung-Hsing University
- Taichung 402, Taiwan
| | - Ten-Chih Chao
- Department of Chemistry
- National Chung-Hsing University
- Taichung 402, Taiwan
| | - Tzu-Hsien Tseng
- Department of Chemistry
- National Chung-Hsing University
- Taichung 402, Taiwan
| | - Peter P.-Y. Chen
- Department of Chemistry
- National Chung-Hsing University
- Taichung 402, Taiwan
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10
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Nakamura M, Ikezaki A, Takahashi M. Metal-Porphyrin Orbital Interactions in Paramagnetic Iron Complexes Having Planar and Deformed Porphyrin Ring. J CHIN CHEM SOC-TAIP 2012. [DOI: 10.1002/jccs.201200474] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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Chen CC, Chen PPY. Paramagnetic NMR Shifts for Saddle-Shaped Five-Coordinate Iron(III) Porphyrin Complexes with Intermediate-Spin Structure. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201203308] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Chen CC, Chen PPY. Paramagnetic NMR Shifts for Saddle-Shaped Five-Coordinate Iron(III) Porphyrin Complexes with Intermediate-Spin Structure. Angew Chem Int Ed Engl 2012; 51:9325-9. [DOI: 10.1002/anie.201203308] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Revised: 07/31/2012] [Indexed: 11/08/2022]
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13
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Kepenekian M, Calborean A, Vetere V, Le Guennic B, Robert V, Maldivi P. Toward Reliable DFT Investigations of Mn-Porphyrins through CASPT2/DFT Comparison. J Chem Theory Comput 2011; 7:3532-9. [DOI: 10.1021/ct2004066] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Mikael Kepenekian
- SCIB, UMR_E 3 CEA/UJF-Grenoble 1, Laboratoire de Reconnaissance Ionique et Chimie de Coordination, INAC, Grenoble, F-38054, France
- Université de Lyon, CNRS, Institut de Chimie de Lyon, Ecole Normale Supérieure de Lyon, 15 Parvis René Descartes, 69342 Lyon Cedex 07, France
| | - Adrian Calborean
- SCIB, UMR_E 3 CEA/UJF-Grenoble 1, Laboratoire de Reconnaissance Ionique et Chimie de Coordination, INAC, Grenoble, F-38054, France
| | - Valentina Vetere
- SCIB, UMR_E 3 CEA/UJF-Grenoble 1, Laboratoire de Reconnaissance Ionique et Chimie de Coordination, INAC, Grenoble, F-38054, France
| | - Boris Le Guennic
- Université de Lyon, CNRS, Institut de Chimie de Lyon, Ecole Normale Supérieure de Lyon, 15 Parvis René Descartes, 69342 Lyon Cedex 07, France
| | - Vincent Robert
- Université de Lyon, CNRS, Institut de Chimie de Lyon, Ecole Normale Supérieure de Lyon, 15 Parvis René Descartes, 69342 Lyon Cedex 07, France
- Laboratoire de Chimie Quantique, Institut de Chimie de Strasbourg, UMR7177 CNRS/Université de Strasbourg, 4, rue Blaise Pascal, CS 90032, 67081 Strasbourg-Cedex, France
| | - Pascale Maldivi
- SCIB, UMR_E 3 CEA/UJF-Grenoble 1, Laboratoire de Reconnaissance Ionique et Chimie de Coordination, INAC, Grenoble, F-38054, France
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Kouno S, Ikezaki A, Ikeue T, Nakamura M. Spin–spin interactions in iron(III) porphyrin radical cations with ruffled and saddled structure. J Inorg Biochem 2011; 105:718-21. [DOI: 10.1016/j.jinorgbio.2011.01.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2010] [Revised: 01/05/2011] [Accepted: 01/10/2011] [Indexed: 11/29/2022]
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15
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Ikeue T, Handa M, Chamberlin A, Ghosh A, Ongayi O, Vicente MGH, Ikezaki A, Nakamura M. Benzoannelation Stabilizes the dxy1 State of Low-Spin Iron(III) Porphyrinates. Inorg Chem 2011; 50:3567-81. [DOI: 10.1021/ic1024873] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takahisa Ikeue
- Department of Chemistry, Faculty of Material Science, Shimane University, 1060 Nishikawatsu-cho, Matsue-shi, Shimane 690-8504, Japan
| | - Makoto Handa
- Department of Chemistry, Faculty of Material Science, Shimane University, 1060 Nishikawatsu-cho, Matsue-shi, Shimane 690-8504, Japan
| | - Adam Chamberlin
- Department of Chemistry and the Center for Theoretical and Computational Chemistry, University of Tromso, Breivika, N-9037 Tromso, Norway
| | - Abhik Ghosh
- Department of Chemistry and the Center for Theoretical and Computational Chemistry, University of Tromso, Breivika, N-9037 Tromso, Norway
| | - Owendi Ongayi
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - M. Graça H. Vicente
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803, United States
| | - Akira Ikezaki
- Department of Chemistry, School of Medicine, Toho University, Ota-ku, Tokyo 143-8540, Japan
| | - Mikio Nakamura
- Department of Chemistry, School of Medicine, Toho University, Ota-ku, Tokyo 143-8540, Japan
- Division of Chemistry, Graduate School of Science, Toho University, Funabashi 274-8510, Japan
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Ikezaki A, Nakamura M. Formation and characterization of a six-coordinate iron(iii) complex with the most ruffled porphyrin ring. Dalton Trans 2011; 40:3455-8. [DOI: 10.1039/c1dt10042d] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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17
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Patra R, Chaudhary A, Ghosh SK, Rath SP. Axial Ligand Orientations in a Distorted Porphyrin Macrocycle: Synthesis, Structure, and Properties of Low-Spin Bis(imidazole)iron(III) and Iron(II) Porphyrinates†Dedicated to Prof. Animesh Chakravorty on the occasion of his 75th birthday. Inorg Chem 2010; 49:2057-67. [DOI: 10.1021/ic9016504] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ranjan Patra
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Arvind Chaudhary
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Sudip Kumar Ghosh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Sankar Prasad Rath
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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18
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Patra R, Bhowmik S, Ghosh SK, Rath SP. Effects of axial pyridine coordination on a saddle-distorted porphyrin macrocycle: stabilization of hexa-coordinated high-spin Fe(iii) and air-stable low-spin iron(ii) porphyrinates. Dalton Trans 2010; 39:5795-806. [DOI: 10.1039/b924742d] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Cheng RJ, Lee CH, Chao CW. An unexpected bonding interaction between d(xy) and axial cyanide mediated by porphyrin deformation. Chem Commun (Camb) 2009:2526-8. [PMID: 19532878 DOI: 10.1039/b901116a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Through density functional calculation and NMR spectroscopy, an unexpected bonding interaction between d(xy) and axial cyanides is revealed to account for the lower shielding of axial cyanide of ruffled [Fe(TRP)(CN)(2)](-) complexes with the contribution of the unusual low-spin electronic structure (d(xz)d(yz))(4)(d(xy))(1).
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Affiliation(s)
- Ru-Jen Cheng
- Department of Chemistry, National Chung-Hsing University, Taichung, Taiwan, Republic of China.
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20
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Ling Y, Zhang Y. Mössbauer, NMR, geometric, and electronic properties in S = 3/2 iron porphyrins. J Am Chem Soc 2009; 131:6386-8. [PMID: 19415933 PMCID: PMC2730173 DOI: 10.1021/ja9006723] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Iron porphyrins with the intermediate spin S = 3/2 or admixed with S = 5/2 or 1/2 are models for a number of heme protein systems, including cytochromes c'. The (57)Fe Mossbauer quadrupole splittings and (1)H and (13)C NMR chemical shifts have been found to be useful probes of their electronic states. We present the results of the first successful quantum chemical calculations of the Mössbauer and NMR properties in various S = 3/2 iron porphyrin complexes, covering four-, five-, and six-coordinate states and three commonly seen porphyrin conformations: planar, ruffled, and saddled. Several interesting correlations among these useful experimental spectroscopic probes and geometric and electronic properties were discovered. These results should facilitate future investigations of related heme proteins and model systems.
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Affiliation(s)
- Yan Ling
- Departments of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406, USA
| | - Yong Zhang
- Departments of Chemistry and Biochemistry, University of Southern Mississippi, 118 College Drive #5043, Hattiesburg, MS 39406, USA
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Cheng RJ, Chao CW, Han YP, Chen YC, Ting CH. Saddle-shaped six-coordinate iron(iii) porphyrin complex with unusual intermediate-spin electronic structure. Chem Commun (Camb) 2009:2180-2. [DOI: 10.1039/b820443h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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22
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Factors that stabilize the electron configuration in iron(III) porphyrinates: A case of bis(benzaldehyde) complex. INORG CHEM COMMUN 2008. [DOI: 10.1016/j.inoche.2008.07.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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23
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Patra R, Chaudhary A, Ghosh SK, Rath SP. Modulation of Metal Displacements in a Saddle Distorted Macrocycle: Synthesis, Structure, and Properties of High-Spin Fe(III) Porphyrins and Implications for the Hemoproteins. Inorg Chem 2008; 47:8324-35. [DOI: 10.1021/ic800944q] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Ranjan Patra
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Arvind Chaudhary
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Sudip Kumar Ghosh
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
| | - Sankar Prasad Rath
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur-208016, India
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Cheng RJ, Chang SH, Hung KC. An Anomalous Spin-Polarization Mechanism in High-Spin Manganese(III) Porphyrin Complexes. Inorg Chem 2007; 46:1948-50. [PMID: 17309250 DOI: 10.1021/ic0617238] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Confluence of NMR for paramagnetic molecules and the complementary density functional theory calculations reveals an anomalous spin-polarization mechanism that is maximized in high-spin d(4) complexes. It is critical to realize this mechanism to correctly rationalize the spin-density distribution around the porphyrin macrocycle.
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Affiliation(s)
- Ru-Jen Cheng
- Department of Chemistry, National Chung-Hsing University, Taichung, Taiwan 402, Republic of China.
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25
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Weiss R, Gold A, Terner J. Cytochromes c‘: Biological Models for the S = 3/2,5/2 Spin-State Admixture? Chem Rev 2006; 106:2550-79. [PMID: 16771459 DOI: 10.1021/cr040416l] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Raymond Weiss
- Laboratoire de Chimie Supramoléculaires, Institut de Science et d'Ingénierie Supramoléculaires, Université Louis Pasteur de Strasbourg, 8 Allée Gaspard Monge, B.P.70028, F-67083 Strasbourg Cedex, France
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Ikezaki A, Nakamura M, Cheng RJ. Anomalous13C NMR Chemical Shifts of High-spin Saddle Shaped Manganese(III) Octaethyltetraphenylporphyrin Complexes. CHEM LETT 2006. [DOI: 10.1246/cl.2006.156] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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28
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Ohgo Y, Neya S, Uekusa H, Nakamura M. An isocyanide probe for heme electronic structure: bis(tert-butylisocyanide) complex of diazaporphyrin showing a unique (dxy)2(dxz, dyz)3 ground state. Chem Commun (Camb) 2006:4590-2. [PMID: 17082852 DOI: 10.1039/b609910f] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Isocyanide-bound model hemes always adopt the (dxz, dyz)4(dxy)1 ground state, however, we have found that the replacement of porphyrin by diazaporphyrin leads to the formation of an unprecedented low-spin bis(tert-butylisocyanide) complex with the (dxy)2(dxz, dyz)3 ground state.
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Affiliation(s)
- Yoshiki Ohgo
- Department of Chemistry, School of Medicine, Toho University, Ota-ku, Tokyo 143-8540, Japan.
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