1
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Yadav R, Maiti A, Schorpp M, Graf J, Weigend F, Greb L. Supramolecular trapping of a cationic all-metal σ-aromatic {Bi 4} ring. Nat Chem 2024; 16:1523-1530. [PMID: 38760432 PMCID: PMC11374680 DOI: 10.1038/s41557-024-01530-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 04/05/2024] [Indexed: 05/19/2024]
Abstract
Aromaticity in organic molecules is well defined, but its role in metal-only rings remains controversial. Here we introduce a supramolecular stabilization approach of a cationic {Bi4} rhomboid within the symmetric charge sphere of two bowl-shaped dianionic calix[4]pyrrolato indinates. Crystallographic and spectroscopic characterization, quantum chemical analysis and magnetically induced ring currents indicate σ-aromaticity in the formally tetracationic 16-valence electron [Bi4]4+ ring. Computational screening for other p-block elements identifies the planar rhomboid as the globally preferred structure for 16-valence electron four-atomic clusters. The aromatic [Bi4]4+ is isoelectronic to the [Al4]4-, a motif previously observed as antiaromatic in Li3[Al4]- in the gas phase. Thus, subtle factors such as charge isotropy seem to decide over aromaticity or antiaromaticity, advising for caution in debates based on the Hückel model-a concept valid for second-row elements but less deterministic for the heavier congeners.
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Affiliation(s)
- Ravi Yadav
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
- School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram, Thiruvananthapuram, India
| | - Avijit Maiti
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
| | | | - Jürgen Graf
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
| | - Florian Weigend
- Fachbereich Chemie, Philipps-Universität Marburg, Marburg, Germany.
| | - Lutz Greb
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany.
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2
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Liao B, Gao J, Weng P, He L, Zhang Y, Liu Q, Zhou Z. Semiconductor Effect from Pd(II) Porphyrin Metal to Its Ligand in Photocatalytic N-Dealkylation. CHEMSUSCHEM 2024:e202401381. [PMID: 39113132 DOI: 10.1002/cssc.202401381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2024] [Revised: 07/19/2024] [Indexed: 10/11/2024]
Abstract
In this work, four saddled Pd(II) porphyrins were developed as photocatalyst for N-dealkylation of triethyl Rhodamine (TER) under visible light, and their catalytic ability was found to be negatively related to the out-of-plane of their macrocycles. Two important relationships involving the metalloporphyrins as catalyst were revealed: (1) a photoexcitative semiconductor effect between the 4dx 2-γ 2(Pd) and a2u(π) orbitals of Pd(II) porphyrin on the dealkylation. (2) a domino process from strap length, ring geometry, core deformation, d-π gap variation, to photocatalytic activity. Two revelations imply a unidirectional electron transfer route from axial ligand, to central metal, to porphyrin ring based on photoexcitation and guide the design and development of complex photocatalysts, and their revelation is attributed to the acquisition of a series of Pd(II) porphyrins with continuous ring distortion. The findings help to understand the photocatalytic single electron transfer (SET)-first mechanism based on metallic complex.
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Affiliation(s)
- Borong Liao
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education; and School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Yuhu District, Xiangtan, 411201, China
| | - Junhao Gao
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education; and School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Yuhu District, Xiangtan, 411201, China
| | - Pei Weng
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education; and School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Yuhu District, Xiangtan, 411201, China
- Institute for Catalysis and Energy Solutions, Florida Campus, University of South Africa, Roodepoort, 1710, South Africa
| | - Linya He
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education; and School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Yuhu District, Xiangtan, 411201, China
| | - Yusheng Zhang
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education; and School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Yuhu District, Xiangtan, 411201, China
| | - Qiuhua Liu
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education; and School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Yuhu District, Xiangtan, 411201, China
- Institute for Catalysis and Energy Solutions, Florida Campus, University of South Africa, Roodepoort, 1710, South Africa
| | - Zaichun Zhou
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules, Ministry of Education; and School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Yuhu District, Xiangtan, 411201, China
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3
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Ruppert H, Meister A, Janßen P, Greb L. Conformational and Substitution Effects on the Donor and Reducing Strength of Tin(II) Porphyrinogens. Chemistry 2024; 30:e202401685. [PMID: 38803093 DOI: 10.1002/chem.202401685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 05/24/2024] [Accepted: 05/27/2024] [Indexed: 05/29/2024]
Abstract
Meso-octaalkylcalix[4]pyrrolates are a class of redox-active porphyrinogen ligands. They have been well established in d- and f-block chemistry for over three decades but have only recently been introduced as ligands for p-block elements. Here, we present a study on the influence of meso-substituents on the redox chemistry of calix[4]pyrrolato stannate(II) dianions [2R]2- (R=Me, Et). Expansion of the normal-mode structural decomposition (NSD) method, well known for porphyrin chemistry, provides insights into the ligand conformation of a calix[4]pyrrolato p-block complex. Combined with the results of spectroscopic donor scaling, electrochemical studies, and quantum mechanical bond analysis tools, subtle but significant substitution and conformational effects on the electronic structure are revealed. Exploiting this knowledge rationalizes the role of this class of tin(II) dianions to act as potent reducing agents, but can also be expanded for other central elements. Photoexcitation boosts this reactivity further, allowing for the reduction of even challenging chlorobenzene.
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Affiliation(s)
- Heiko Ruppert
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 275, 69120, Heidelberg, Germany
| | - Arne Meister
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 275, 69120, Heidelberg, Germany
| | - Paul Janßen
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 275, 69120, Heidelberg, Germany
| | - Lutz Greb
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 275, 69120, Heidelberg, Germany
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4
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D'Arpino AA, Wolczanski PT, MacMillan SN, Cundari TR, Krumov MR. Reduction of (pddi)Cr reveals redox noninnocence via C-C bond formation amidst competing electrophilicity: [(cpta)CrMe n] - ( n = 0, 1) and [(pta)Cr] . Chem Commun (Camb) 2024; 60:6785-6788. [PMID: 38868936 DOI: 10.1039/d4cc01690d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2024]
Abstract
Reversible cyclopropane formation is probed as a means of redox noninnocence in diimine/diamide chelates via reduction and complex anion formation. Competition from imine attack renders complications in the latter approach, and electrochemical measurements with calculational support provide the rationale.
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Affiliation(s)
- Alexander A D'Arpino
- Department of Chemistry and Chemical Biology Baker Laboratory, Cornell University, Ithaca, NY 14853, USA.
| | - Peter T Wolczanski
- Department of Chemistry and Chemical Biology Baker Laboratory, Cornell University, Ithaca, NY 14853, USA.
| | - Samantha N MacMillan
- Department of Chemistry and Chemical Biology Baker Laboratory, Cornell University, Ithaca, NY 14853, USA.
| | - Thomas R Cundari
- Department of Chemistry, CasCam, University of North Texas, Denton, TX 76201, USA
| | - Mihail R Krumov
- Department of Chemistry and Chemical Biology Baker Laboratory, Cornell University, Ithaca, NY 14853, USA.
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5
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Iwanov C, Hopp MP, Lorenz D, Ballmann J, Enders M. Dioxygen Activation and Reduction by a Soluble Iron Phthalocyanine. Chemistry 2023:e202302761. [PMID: 37831012 DOI: 10.1002/chem.202302761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 10/11/2023] [Accepted: 10/13/2023] [Indexed: 10/14/2023]
Abstract
Iron ions in a square-planar coordination can bind molecules at the vacant axial positions and are able to transform them in stoichiometric and catalytic reactions. Nature takes advantage of these properties by incorporating iron into porphyrin systems, which play a key role not only in the binding and transport of oxygen, but also in catalytic oxidation and reduction reactions involving cytochrome P450. Although these systems have been studied extensively, there are still unresolved questions regarding the interplay between the iron ions and the surrounding ligands. Phthalocyanines (Pc) create a similar environment for metal atoms and FePc is known for a long time. However, without axial ligands FePc aggregates leading to solids of low solubility. In this work we used a known six-coordinate iron phthalocyanine derivative with bulky substituents and removed the stabilizing axial ligands. The resulting paramagnetic, four-coordinate compound does not aggregate and dissolves well so that NMR spectroscopy can be employed for studying the molecular structure and the reactivity. Solvent molecules bind weakly to the iron centers and oxygen is reduced in the presence of H-atom donors. The stoichiometric and catalytic reactivity with oxygen was studied in more detail.
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Affiliation(s)
- Christian Iwanov
- Institute of Inorganic Chemistry, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Moritz Philipp Hopp
- Institute of Inorganic Chemistry, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Domenik Lorenz
- Institute of Inorganic Chemistry, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Joachim Ballmann
- Institute of Inorganic Chemistry, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Markus Enders
- Institute of Inorganic Chemistry, Heidelberg University, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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6
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Yadav R, Janßen P, Schorpp M, Greb L. Calix[4]pyrrolato-germane-(thf) 2: Unlocking the Anti-van't Hoff-Le Bel Reactivity of Germanium(IV) by Ligand Dissociation. J Am Chem Soc 2023; 145:17746-17754. [PMID: 37549106 PMCID: PMC10436272 DOI: 10.1021/jacs.3c04424] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Indexed: 08/09/2023]
Abstract
Anti-van't Hoff-Le Bel configured p-block element species possess intrinsically high reactivity and are thus challenging to isolate. Consequently, numerous elements in this configuration, including square-planar germanium(IV), remain unexplored. Herein, we follow a concept to reach anti-van't Hoff-Le Bel reactivity by ligand dissociation from a rigid calix[4]pyrrole germane in its bis(thf) adduct. While the macrocyclic ligand assures square-planar coordination in the uncomplexed form, the labile thf donors provide robustness for isolation on a multigram scale. Unique properties of a low-lying acceptor orbital imparted to germanium(IV) can be verified, e.g., by isolating an elusive anionic hydrido germanate and exploiting it for challenging bond activations. Aldehydes, water, alcohol, and a CN triple bond are activated for the first time by germanium-ligand cooperativity. Unexpected behaviors against fluoride ion donors disclose critical interferences of a putative redox-coupled fluoride ion transfer during the experimental determination of Lewis acidity. Overall, we showcase how ligand lability grants access to the uncharted chemistry of anti-van't Hoff-Le Bel germanium(IV) and line up this element as a member in the emerging class of structurally constrained p-block elements.
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Affiliation(s)
| | | | | | - Lutz Greb
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg 69120, Germany
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7
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Liu Q, Gao J, Zhang Y, Liu X, Zhang X, Lin Q, Zeng W, Zhou Z. A trans-ortho asymmetrically di-strapped metalloporphyrin integrating three key structural features of ligand in heme. CHINESE CHEM LETT 2023. [DOI: 10.1016/j.cclet.2023.108315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/15/2023]
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8
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Chakraborty U, Fedulin A, Jacobi von Wangelin A. Synthesis and Catalysis of Anionic Amido Iron(II) Complexes. ChemCatChem 2022; 14:e202201105. [PMID: 37064762 PMCID: PMC10099668 DOI: 10.1002/cctc.202201105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/21/2022] [Indexed: 11/11/2022]
Abstract
Low-coordinate, open-shell 3d metal complexes have attracted great attention due to their critical role in several catalytic transformations but have been notoriously difficult to prepare and study due to their high lability. Here, we report the synthesis of a heteroleptic tri-coordinate amidoferrate that displays high catalytic activity in the regioselective hydrosilylation of alkenes.
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Affiliation(s)
- Uttam Chakraborty
- Department of ChemistryUniversity of HamburgMartin Luther King Pl 620146HamburgGermany
| | - Andrey Fedulin
- Department of ChemistryUniversity of HamburgMartin Luther King Pl 620146HamburgGermany
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9
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Schorpp M, Yadav R, Roth D, Greb L. Calix[4]pyrrolato Stibenium: Lewis Superacidity by Antimony(III)-Antimony(V) Electromerism. Angew Chem Int Ed Engl 2022; 61:e202207963. [PMID: 35925742 DOI: 10.1002/anie.202207963] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Indexed: 01/07/2023]
Abstract
Lewis superacids enable the activation of highly inert substrates. However, the permanent presence of a Lewis superacidic center comes along with a constantly increased intolerance toward functional groups or ambient conditions. Herein, we describe a strategy to unleash Lewis superacidity by electromerism. Experimental and computational results indicate that coordinating a Lewis base to Δ-calix[4]pyrrolato-antimony(III) triggers a ligand redox-noninnocent coupled transfer into antimony(V)-state that exhibits Lewis superacidic features. Lewis acidity by electromerism establishes a concept of potential generality for powerful yet robust reagents and on-site substrate activation approaches.
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Affiliation(s)
- Marcel Schorpp
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Ravi Yadav
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Daniel Roth
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Lutz Greb
- Department of Chemistry and Biochemistry-Inorganic Chemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany
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10
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Schorpp M, Yadav R, Roth D, Greb L. Calix[4]pyrrolato Stibenium: Lewis Superacidity by Antimony(III)‐Antimony(V) Electromerism. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202207963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Marcel Schorpp
- Ruprecht Karls Universitat Heidelberg Anorganisch-Chemisches Institut GERMANY
| | - Ravi Yadav
- Ruprecht Karls Universitat Heidelberg Anorganisch-Chemisches Institut GERMANY
| | - Daniel Roth
- Ruprecht Karls Universitat Heidelberg Anorganisch-Chemisches Institut GERMANY
| | - Lutz Greb
- Freie Universitat Berlin Institut für Chemie und Biochemie, Anorganische Chemie Institut für Anorganische ChemieFabeckstr. 34-36 14195 Berlin GERMANY
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11
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Ruppert H, Greb L. Calix[4]pyrrolato Stannate(II): A Tetraamido Tin(II) Dianion and Strong Metal-Centered σ-Donor. Angew Chem Int Ed Engl 2022; 61:e202116615. [PMID: 35019214 PMCID: PMC9306640 DOI: 10.1002/anie.202116615] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Indexed: 01/07/2023]
Abstract
Anionic, metal-centered nucleophiles are emerging compounds with unique reactivities. Here, we describe the isolation and full characterization of the first tetraamido tin(II) dianion, its behavior as ligand towards transition metals, and its reactivity as a tin-centered nucleophile. Experimental values such as the Tolman electronic parameter (TEP) and computations attest tin-located σ-donor ability exceeding that of carbenes or electron-rich phosphines. Against transition metals, the stannate(II) can act as η1 - or η5 -type ligand. With aldehydes, it reacts by hydride substitution to give valuable acyl stannates. The reductive dehalogenation of iodobenzene indicates facile redox pathways mediated by halogen bond interaction. Calix[4]pyrrolato stannate(II) represents the first example of this macrocyclic ligand in low-valent p-block element chemistry.
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Affiliation(s)
- Heiko Ruppert
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
| | - Lutz Greb
- Department of Chemistry and Biochemistry - Inorganic ChemistryFreie Universität BerlinFabeckstr. 34/3614195BerlinGermany
- Anorganisch-Chemisches InstitutRuprecht-Karls-Universität HeidelbergIm Neuenheimer Feld 27069120HeidelbergGermany
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12
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Rickmeyer K, Niederegger L, Keilwerth M, Hess CR. Multifaceted Role of the Noninnocent Mabiq Ligand in Promoting Selective Reduction of CO2 to CO. ACS Catal 2022. [DOI: 10.1021/acscatal.1c04636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kerstin Rickmeyer
- Department of Chemistry and Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Lukas Niederegger
- Department of Chemistry and Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
| | - Martin Keilwerth
- Department of Chemistry and Pharmacy, Inorganic Chemistry, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Egerlandstr. 1, 91058 Erlangen, Germany
| | - Corinna R. Hess
- Department of Chemistry and Catalysis Research Center (CRC), Technical University of Munich, Lichtenbergstr. 4, 85748 Garching, Germany
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13
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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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14
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Ruppert H, Greb L. Calix[4]pyrrolato Stannate(II): A Tetraamido Tin(II) Dianion and Strong Metal‐Centered σ‐Donor. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202116615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Heiko Ruppert
- Ruprecht Karls Universität Heidelberg: Ruprecht Karls Universitat Heidelberg Anorganisch-Chemisches Institut GERMANY
| | - Lutz Greb
- Freie Universitat Berlin Institut für Chemie und Biochemie, Anorganische Chemie Institut für Anorganische ChemieFabeckstr. 34-36 14195 Berlin GERMANY
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15
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George GM, Wolczanski PT, MacMillan SN. Attempts at Generating Metathesis-Active Fe(IV) and Co(IV) Complexes via the Reactions of (silox)2M(THF)2, [(silox)3M][Na(THF)2] (M = Fe, Co), and Related Species with Propellanes and Triphenylboron. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115656] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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16
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Ruppert H, Sigmund LM, Greb L. Calix[4]pyrroles as ligands: recent progress with a focus on the emerging p-block element chemistry. Chem Commun (Camb) 2021; 57:11751-11763. [PMID: 34661225 DOI: 10.1039/d1cc05120b] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Calix[4]pyrroles are readily synthesized in one step from pyrroles and ketones. For several decades, these macrocycles have been exploited as powerful anion receptors or ligands for transition and rare-earth metals. In contrast, calix[4]pyrrolates as ligands for p-block elements were established only in 2018. The present feature article reviews these developments, together with the recent progress on s-, d-, and f-block element complexes of the calix[4]pyrroles. Particular focus is given on the calix[4]pyrrolato aluminate and the corresponding silane, both featuring square planar-coordinated p-block elements in their highest oxidation states. These unique "anti-van't-Hoff-Le-Bel" structures introduce valuable characteristics into main-group element chemistry, such as agostic interactions or ligand-to-metal charge transfer absorptions. The most vital reactivities are highlighted, which rely on properties ranging from amphoterism, redox-activity, and a small HOMO-LUMO gap up to the ability to provide a platform for additional external stimuli. Overall, these developments underscore the beneficial impact of structural constraint of p-block elements and element-ligand cooperativity to enhance the functionality of the most abundant elements in their native oxidation states.
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Affiliation(s)
- Heiko Ruppert
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
| | - Lukas M Sigmund
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
| | - Lutz Greb
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120 Heidelberg, Germany.
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17
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Sigmund LM, Ehlert C, Enders M, Graf J, Gryn'ova G, Greb L. Disauerstoffaktivierung und Pyrrol‐α‐Spaltung mit Calix[4]pyrrolatoaluminaten: Enzymmodell durch strukturellen Zwang. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202104916] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Lukas Maximilian Sigmund
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
| | - Christopher Ehlert
- Heidelberger Institut für Theoretische Studien (HITS gGmbH) Schloss-Wolfsbrunnenweg 35 69118 Heidelberg Deutschland
- Interdisziplinäres Zentrum für wissenschaftliches Rechnen (IWR) Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 205 69120 Heidelberg Deutschland
| | - Markus Enders
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
| | - Jürgen Graf
- Organisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
| | - Ganna Gryn'ova
- Heidelberger Institut für Theoretische Studien (HITS gGmbH) Schloss-Wolfsbrunnenweg 35 69118 Heidelberg Deutschland
- Interdisziplinäres Zentrum für wissenschaftliches Rechnen (IWR) Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 205 69120 Heidelberg Deutschland
| | - Lutz Greb
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Deutschland
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18
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Sigmund LM, Ehlert C, Enders M, Graf J, Gryn'ova G, Greb L. Dioxygen Activation and Pyrrole α-Cleavage with Calix[4]pyrrolato Aluminates: Enzyme Model by Structural Constraint. Angew Chem Int Ed Engl 2021; 60:15632-15640. [PMID: 33955154 PMCID: PMC8362023 DOI: 10.1002/anie.202104916] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Indexed: 01/30/2023]
Abstract
The present work describes the reaction of triplet dioxygen with the porphyrinogenic calix[4]pyrrolato aluminates to alkylperoxido aluminates in high selectivity. Multiconfigurational quantum chemical computations disclose the mechanism for this spin‐forbidden process. Despite a negligible spin–orbit coupling constant, the intersystem crossing (ISC) is facilitated by singlet and triplet state degeneracy and spin–vibronic coupling. The formed peroxides are stable toward external substrates but undergo an unprecedented oxidative pyrrole α‐cleavage by ligand aromatization/dearomatization‐initiated O−O σ‐bond scission. A detailed comparison of the calix[4]pyrrolato aluminates with dioxygen‐related enzymology provides insights into the ISC of metal‐ or cofactor‐free enzymes. It substantiates the importance of structural constraint and element–ligand cooperativity for the functions of aerobic life.
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Affiliation(s)
- Lukas Maximilian Sigmund
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Christopher Ehlert
- Heidelberg Institute for Theoretical Studies (HITS gGmbH), Schloss-Wolfsbrunnenweg 35, 69118, Heidelberg, Germany.,Interdisciplinary Center for Scientific Computing (IWR), Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 205, 69120, Heidelberg, Germany
| | - Markus Enders
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Jürgen Graf
- Organisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Ganna Gryn'ova
- Heidelberg Institute for Theoretical Studies (HITS gGmbH), Schloss-Wolfsbrunnenweg 35, 69118, Heidelberg, Germany.,Interdisciplinary Center for Scientific Computing (IWR), Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 205, 69120, Heidelberg, Germany
| | - Lutz Greb
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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19
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Dmitrieva OA, Chizhova NV, Tesakova MV, Parfenyuk VI, Mamardashvili NZ. Meso-nitro substitution as a means of Mn-octaethylporphyrin redox state controlling. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121790] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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20
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Hatzis GP, Thomas CM. Metal–ligand cooperativity across two sites of a square planar iron(ii) complex ligated by a tetradentate PNNP ligand. Chem Commun (Camb) 2020; 56:8611-8614. [DOI: 10.1039/d0cc02152k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A square planar (PNNP)FeII complex is shown to readily activate two B–H bonds across the Fe–amide linkages in an overall four-electron process facilitated by metal–ligand cooperativity.
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Affiliation(s)
- Gillian P. Hatzis
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W. 18th Ave, Columbus, OH 43210, USA
| | - Christine M. Thomas
- Department of Chemistry and Biochemistry, The Ohio State University, 100 W. 18th Ave, Columbus, OH 43210, USA
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21
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22
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Melanson JA, Figliola C, Smithen DA, Kajetanowicz AK, Thompson A. Probing the hydrolytic reactivity of 2-difluoromethyl pyrroles. Org Biomol Chem 2018; 15:144-152. [PMID: 27841887 DOI: 10.1039/c6ob01441k] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
α-Difluoromethyl pyrroles were found to be stable while N-protected with an electron-withdrawing group. Due to the propensity of pyrroles to access azafulvenium-like intermediates, the C-F bonds of an α-difluoromethyl substituent are labile under hydrolytic conditions. The presence of certain electron-withdrawing substituents about the pyrrolic ring can accelerate this process, as determined through a kinetic comparison of the deprotection and subsequent hydrolysis reactions of N-protected β-aryl α-difluoromethyl pyrroles.
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Affiliation(s)
- Jennifer A Melanson
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada.
| | - Carlotta Figliola
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada.
| | - Deborah A Smithen
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada.
| | | | - Alison Thompson
- Department of Chemistry, Dalhousie University, P.O. Box 15000, Halifax, NS B3H 4R2, Canada.
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23
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Potocny AM, Pistner AJ, Yap GPA, Rosenthal J. Electrochemical, Spectroscopic, and 1O 2 Sensitization Characteristics of Synthetically Accessible Linear Tetrapyrrole Complexes of Palladium and Platinum. Inorg Chem 2017; 56:12703-12711. [PMID: 28991441 DOI: 10.1021/acs.inorgchem.7b00796] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The synthesis, electrochemistry, and photophysical characterization of a 10,10-dimethyl-5,15-bis(pentafluorophenyl)biladiene (DMBil1) linear tetrapyrrole supporting PdII or PtII centers is presented. Both of these nonmacrocyclic tetrapyrrole platforms are robust and easily prepared via modular routes. X-ray diffraction experiments reveal that the Pd[DMBil1] and Pt[DMBil1] complexes adopt similar structures and incorporate a single PdII and PtII center, respectively. Additionally, electrochemical experiments revealed that both Pd[DMBil1] and Pt[DMBil1] can undergo two discrete oxidation and reduction processes. Spectroscopic experiments carried out for Pd[DMBil1] and Pt[DMBil1] provide further understanding of the electronic structure of these systems. Both complexes strongly absorb light in the UV-visible region, especially in the 350-600 nm range. Both Pd[DMBil1] and Pt[DMBil1] are luminescent under a nitrogen atmosphere. Upon photoexcitation of Pd[DMBil1], two emission bands are observed; fluorescence is detected from ∼500-700 nm and phosphorescence from ∼700-875 nm. Photoexcitation of Pt[DMBil1] leads only to phosphorescence, presumably due to enhanced intersystem crossing imparted by the heavier PtII center. Phosphorescence from both complexes is quenched under air due to energy transfer from the excited triplet state to ground state oxygen. Accordingly, irradiation with light of λ ≥ 500 nm prompts Pd[DMBil1] and Pt[DMBil1] to photosensitize the generation of 1O2 (singlet oxygen) with impressive quantum yields of 80% and 78%, respectively. The synthetic accessibility of these complexes coupled with their ability to efficiently photosensitize 1O2 may make them attractive platforms for development of new agents for photodynamic therapy.
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Affiliation(s)
- Andrea M Potocny
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware 19716, United States
| | - Allen J Pistner
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware 19716, United States
| | - Glenn P A Yap
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware 19716, United States
| | - Joel Rosenthal
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware 19716, United States
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24
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Andrez J, Guidal V, Scopelliti R, Pécaut J, Gambarelli S, Mazzanti M. Ligand and Metal Based Multielectron Redox Chemistry of Cobalt Supported by Tetradentate Schiff Bases. J Am Chem Soc 2017; 139:8628-8638. [DOI: 10.1021/jacs.7b03604] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Julie Andrez
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Valentin Guidal
- Univ. Grenoble Alpes, CEA, CNRS, INAC, SYMMES, F-38000 Grenoble, France
| | - Rosario Scopelliti
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Jacques Pécaut
- Univ. Grenoble Alpes, CEA, CNRS, INAC, SYMMES, F-38000 Grenoble, France
| | - Serge Gambarelli
- Univ. Grenoble Alpes, CEA, CNRS, INAC, SYMMES, F-38000 Grenoble, France
| | - Marinella Mazzanti
- Institut des Sciences et Ingénierie Chimiques Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
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25
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Takeuchi N, Nakahodo T, Fujihara H. Remarkably Stable S-Oxides of Calix[4]thiophenes and Their Sulfonium Ylide from Reaction of S-Oxide with Acetylene Derivative. CHEM LETT 2017. [DOI: 10.1246/cl.161105] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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26
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Liu B, Yoshida T, Li X, Stępień M, Shinokubo H, Chmielewski PJ. Reversible Carbon-Carbon Bond Breaking and Spin Equilibria in Bis(pyrimidinenorcorrole). Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201607237] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Bin Liu
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules; Ministry of Education; School of Chemistry and Chemical Engineering; Hunan University of Science and Technology; Xiangtan Hunan 411201 China
| | - Takuya Yoshida
- Department of Applied Chemistry; Graduate School of Engineering; Nagoya University; Nagoya 464-8603 Japan
| | - Xiaofang Li
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules; Ministry of Education; School of Chemistry and Chemical Engineering; Hunan University of Science and Technology; Xiangtan Hunan 411201 China
| | - Marcin Stępień
- Department of Chemistry; University of Wrocław; F. Joliot-Curie 14 50383 Wrocław Poland
| | - Hiroshi Shinokubo
- Department of Applied Chemistry; Graduate School of Engineering; Nagoya University; Nagoya 464-8603 Japan
| | - Piotr J. Chmielewski
- Department of Chemistry; University of Wrocław; F. Joliot-Curie 14 50383 Wrocław Poland
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27
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Liu B, Yoshida T, Li X, Stępień M, Shinokubo H, Chmielewski PJ. Reversible Carbon-Carbon Bond Breaking and Spin Equilibria in Bis(pyrimidinenorcorrole). Angew Chem Int Ed Engl 2016; 55:13142-13146. [DOI: 10.1002/anie.201607237] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Indexed: 01/18/2023]
Affiliation(s)
- Bin Liu
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules; Ministry of Education; School of Chemistry and Chemical Engineering; Hunan University of Science and Technology; Xiangtan Hunan 411201 China
| | - Takuya Yoshida
- Department of Applied Chemistry; Graduate School of Engineering; Nagoya University; Nagoya 464-8603 Japan
| | - Xiaofang Li
- Key Laboratory of Theoretical Organic Chemistry and Functional Molecules; Ministry of Education; School of Chemistry and Chemical Engineering; Hunan University of Science and Technology; Xiangtan Hunan 411201 China
| | - Marcin Stępień
- Department of Chemistry; University of Wrocław; F. Joliot-Curie 14 50383 Wrocław Poland
| | - Hiroshi Shinokubo
- Department of Applied Chemistry; Graduate School of Engineering; Nagoya University; Nagoya 464-8603 Japan
| | - Piotr J. Chmielewski
- Department of Chemistry; University of Wrocław; F. Joliot-Curie 14 50383 Wrocław Poland
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28
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Melhi S, Ding X, Liu ZW, Cao CX, Han BH. A New Strategy to Microporous Polypyrrole Networks Based on Condensation of Pyrrole and Diketone. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600119] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Saad Melhi
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
- University of Chinese Academy of Sciences; Beijing 100049 China
| | - Xuesong Ding
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
| | - Zhi-Wei Liu
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
| | - Cong-Xiao Cao
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
| | - Bao-Hang Han
- CAS Key Laboratory of Nanosystem and Hierarchical Fabrication; CAS Center for Excellence in Nanoscience; National Center for Nanoscience and Technology; Beijing 100190 China
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29
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Nocton G, Ricard L. Reversible C–C coupling in phenanthroline complexes of divalent samarium and thulium. Chem Commun (Camb) 2015; 51:3578-81. [DOI: 10.1039/c5cc00289c] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The phenanthroline adducts of organosamarium and organothulium fragments feature a reversible C–C bond on the phenanthroline ligand.
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Affiliation(s)
- Grégory Nocton
- Laboratoire de Chimie Moléculaire
- CNRS
- Ecole polytechnique
- Palaiseau
- France
| | - Louis Ricard
- Laboratoire de Chimie Moléculaire
- CNRS
- Ecole polytechnique
- Palaiseau
- France
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30
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Abstract
An overview of the chemistry of isoporphyrin, the tautomer of porphyrin, whose existence was predicated by the Noble laureate Woodward, is presented with emphasis on hydroxy-isoporphyrins of tetra-aryl derivatives.
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Affiliation(s)
- Jagannath Bhuyan
- Department of Chemistry
- North Eastern Regional Institute of Science and Technology
- Nirjuli
- India
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31
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Pistner A, Lutterman DA, Ghidiu MJ, Walker E, Yap GPA, Rosenthal J. Factors Controlling the Spectroscopic Properties and Supramolecular Chemistry of an Electron Deficient 5,5-Dimethylphlorin Architecture. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2014; 118:14124-14132. [PMID: 25018789 PMCID: PMC4084833 DOI: 10.1021/jp5016824] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Revised: 05/28/2014] [Indexed: 05/24/2023]
Abstract
A new 5,5-dimethylphlorin derivative (3H(PhlCF3 )) was prepared and studied through a combination of redox, photophysical, and computational experiments. The phlorin macrocycle is significantly distorted from planarity compared to more traditional tetrapyrrole architectures and displays solvatochroism in the soret region of the UV-vis spectrum (∼370-420 nm). DFT calculations indicate that this solvatochromic behavior stems from the polarized nature of the frontier orbital (LUMO+1) that is most heavily involved in these transitions. Compound 3H(PhlCF3 ) also displays an intriguing supramolecular chemistry with certain anions; this phlorin can cooperatively hydrogen-bond two equivalents of fluoride to form 3H(PhlCF3 )·2F- but does not bind larger halides such as Cl- or Br-. Analogous studies revealed that the phlorin can hydrogen-bond with carboxylate anions such as acetate to form 1:1 complexes such as 3H(PhlCF3 )·OAc- . These supramolecular assemblies are robust and form even in relatively polar solvents such as MeCN. Hydrogen-bonding of fluoride and acetate anions to the phlorin N-H residues significantly attenuates the redox and photophysical properties of the phlorin. Moreover, The ability to independently vary the size and pKa of a series of carboxylate hydrogen-bond acceptors has allowed us to probe how phlorin-anion association is controlled by the anion's size and/or basicity. These studies elucidate the physical properties and the electronic effects that shape the supramolecular chemistry displayed by the phlorin platform.
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Affiliation(s)
- Allen
J. Pistner
- Department
of Chemistry and Biochemistry, University
of Delaware, Newark, Delaware 19716, United
States
| | - Daniel A. Lutterman
- Chemical
Sciences Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Michael J. Ghidiu
- Department
of Chemistry and Biochemistry, University
of Delaware, Newark, Delaware 19716, United
States
| | - Eric Walker
- Department
of Chemistry and Biochemistry, University
of Delaware, Newark, Delaware 19716, United
States
| | - Glenn P. A. Yap
- Department
of Chemistry and Biochemistry, University
of Delaware, Newark, Delaware 19716, United
States
| | - Joel Rosenthal
- Department
of Chemistry and Biochemistry, University
of Delaware, Newark, Delaware 19716, United
States
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32
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Cobalt triarylcorroles containing one, two or three nitro groups. Effect of NO2 substitution on electrochemical properties and catalytic activity for reduction of molecular oxygen in acid media. J Inorg Biochem 2014; 136:130-9. [DOI: 10.1016/j.jinorgbio.2013.12.014] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2013] [Revised: 12/24/2013] [Accepted: 12/24/2013] [Indexed: 11/18/2022]
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33
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Sazama GT, Betley TA. Multiple, disparate redox pathways exhibited by a tris(pyrrolido)ethane iron complex. Inorg Chem 2013; 53:269-81. [PMID: 24320208 DOI: 10.1021/ic402210j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Iron(III) complexes of the tris(pyrrolide)ethane trianion have been synthesized by reaction of one- and two-electron oxidants with [(tpe)Fe(THF)][Li(THF)4] (tpe = tris(5-mesitylpyrrolyl)ethane). X-ray crystallography, (57)Fe Mössbauer, (1)H NMR and EPR spectroscopy, SQUID magnetometry, and density functional theory calculations were employed to rigorously establish the iron 3+ oxidation state. All oxidants employed are proposed to operate via an inner-sphere electron transfer mechanism. Dialkyl peroxides and dibenzyldisulfide served to oxidize iron by one electron, and group transfer of an aryl nitrene unit to the Fe(2+) starting material resulted in formation of Fe(3+) amido species following H-atom abstraction by a presumed nitrenoid intermediate. Single electron transfer to and from diphenyldiazoalkane was also observed to yield a diphenyldiazomethanyl radical anion antiferromagnetically coupled to the S = 5/2 Fe(3+). Isolation of Fe(3+) complexes of tpe, in comparison with previous results wherein the tpe ligand was the redox active moiety, presents an unusual juxtaposition of two noncommunicating redox reservoirs, each accessible via different reaction pathways (namely, inner- and outer-sphere electron transfer).
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Affiliation(s)
- Graham T Sazama
- Department of Chemistry and Chemical Biology, Harvard University , 12 Oxford Street, Cambridge, Massachusetts 02138, United States
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34
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Sharma A, Obrai S, Kumar R, Kaur A, Hundal G. 5-Methyl-5-aryldipyrromethanes: synthesis, crystal structure and anion binding studies. Supramol Chem 2013. [DOI: 10.1080/10610278.2013.794280] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Aparna Sharma
- a Department of Chemistry , Hans Raj Mahila Maha Vidyalaya , Jalandhar , India
- b Department of Chemistry , B. R. Ambedkar National Institute of Technology , Jalandhar , Punjab , India
| | - Sangeeta Obrai
- b Department of Chemistry , B. R. Ambedkar National Institute of Technology , Jalandhar , Punjab , India
| | - Rakesh Kumar
- b Department of Chemistry , B. R. Ambedkar National Institute of Technology , Jalandhar , Punjab , India
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35
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Hojilla Atienza CC, Milsmann C, Semproni SP, Turner ZR, Chirik PJ. Reversible Carbon–Carbon Bond Formation Induced by Oxidation and Reduction at a Redox-Active Cobalt Complex. Inorg Chem 2013; 52:5403-17. [DOI: 10.1021/ic400352r] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
| | - Carsten Milsmann
- Department of Chemistry, Princeton
University, Princeton,
New Jersey 08544, United States
| | - Scott P. Semproni
- Department of Chemistry, Princeton
University, Princeton,
New Jersey 08544, United States
| | - Zoë R. Turner
- Department of Chemistry, Princeton
University, Princeton,
New Jersey 08544, United States
| | - Paul J. Chirik
- Department of Chemistry, Princeton
University, Princeton,
New Jersey 08544, United States
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36
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Frazier BA, Williams VA, Wolczanski PT, Bart SC, Meyer K, Cundari TR, Lobkovsky EB. C-C bond formation and related reactions at the CNC backbone in (smif)FeX (smif = 1,3-di-(2-pyridyl)-2-azaallyl): dimerizations, 3 + 2 cyclization, and nucleophilic attack; transfer hydrogenations and alkyne trimerization (X = N(TMS)2, dpma = (di-(2-pyridyl-methyl)-amide)). Inorg Chem 2013; 52:3295-312. [PMID: 23448130 DOI: 10.1021/ic302783y] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Molecular orbital analysis depicts the CNC(nb) backbone of the smif (1,3-di-(2-pyridyl)-2-azaallyl) ligand as having singlet diradical and/or ionic character where electrophilic or nucleophilic attack is plausible. Reversible dimerization of (smif)Fe{N(SiMe3)2} (1) to [{(Me3Si)2N}Fe]2(μ-κ(3),κ(3)-N,py2-smif,smif) (2) may be construed as diradical coupling. A proton transfer within the backbone-methylated, and o-pyridine-methylated smif of putative ((b)Me2(o)Me2smif)FeN(SiMe3)2 (8) provides a route to [{(Me3Si)2N}Fe]2(μ-κ(4),κ(4)-N,py2,C-((b)Me,(b)CH2,(o)Me2(smif)H))2 (9). A 3 + 2 cyclization of ditolyl-acetylene occurs with 1, leading to the dimer [{2,5-di(pyridin-2-yl)-3,4-di-(p-tolyl-2,5-dihydropyrrol-1-ide)}FeN(SiMe3)2]2 (11), and the collateral discovery of alkyne cyclotrimerization led to a brief study that identified Fe(N(SiMe3)2(THF) as an effective catalyst. Nucleophilic attack by (smif)2Fe (13) on (t)BuNCO and (2,6-(i)Pr2C6H3)NCO afforded (RNHCO-smif)2Fe (14a, R = (t)Bu; 14b, 2,6-(i)PrC6H3). Calculations suggested that (dpma)2Fe (15) would favorably lose dihydrogen to afford (smif)2Fe (13). H2-transfer to alkynes, olefins, imines, PhN═NPh, and ketones was explored, but only stoichiometric reactions were affected. Some physical properties of the compounds were examined, and X-ray structural studies on several dinuclear species were conducted.
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Affiliation(s)
- Brenda A Frazier
- Department of Chemistry & Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853, USA
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37
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Dugan TR, Bill E, MacLeod KC, Christian GJ, Cowley RE, Brennessel WW, Ye S, Neese F, Holland PL. Reversible C–C Bond Formation between Redox-Active Pyridine Ligands in Iron Complexes. J Am Chem Soc 2012. [DOI: 10.1021/ja305679m] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Thomas R. Dugan
- Department of Chemistry, University of Rochester, Rochester, New York
| | - Eckhard Bill
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der
Ruhr, Germany
| | - K. Cory MacLeod
- Department of Chemistry, University of Rochester, Rochester, New York
| | - Gemma J. Christian
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der
Ruhr, Germany
| | - Ryan E. Cowley
- Department of Chemistry, University of Rochester, Rochester, New York
| | | | - Shengfa Ye
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der
Ruhr, Germany
| | - Frank Neese
- Max Planck Institute for Chemical Energy Conversion, Mülheim an der
Ruhr, Germany
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38
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Abstract
The reaction of Co(2)(mesityl)(4) with acetonitrile leads to the formation of a planar, low spin, bis-β-diketiminate cobalt(II) complex, (1-mesitylbutane-1,3-diimine)(2)Co (1). EPR spectroscopy, magnetic studies, and DFT calculations reveal the Co(II) ion to reside in a tetragonal ligand field with a (2)B(2)(d(yz))(1) ground state electronic configuration. Oxidation of 1 with ferrocenium hexafluorophosphate furnishes (1-mesitylbutane-1,3-diimine)(2)Co(THF)(2)PF(6) (2). The absence of significant changes in the metal-ligand bond metrics of the X-ray crystal structures of 1 and 2 supports ligand participation in the oxidation event. Moreover, no significant changes in C-C or C-N bond lengths are observed by X-ray crystallography upon oxidation of a β-diketiminate ligand, in contrast to typical redox noninnocent ligand platforms.
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Affiliation(s)
- Michael P Marshak
- Department of Chemistry, 6-335, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, USA
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39
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Pistner AJ, Yap GPA, Rosenthal J. A Tetrapyrrole Macrocycle Displaying a Multielectron Redox Chemistry and Tunable Absorbance Profile. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2012; 116:16918-168924. [PMID: 22993642 PMCID: PMC3443682 DOI: 10.1021/jp3059382] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Porphyrins are attractive chromophores for incorporation into light harvesting devices. Some of the most efficient porphyrin derivatives in this regard are synthetically complex platforms with specially tailored electronic properties. This work details the unique geometric and electronic structure of the phlorin framework. X-ray crystallography and NMR spectroscopy demonstrate that unlike typical tetrapyrrole macrocycles, the phlorin is not aromatic. These unusual electronics are manifest in distinct photophysical and redox properties, as the phlorin displays a rich multielectron redox chemistry. The phlorin also displays an intriguing supramolecular chemistry and can reversibly bind up to two equivalents of fluoride in cooperative fashion. Accordingly, this synthetically accessible sensitizer displays a rich multielectron redox chemistry, excellent spectral coverage and an intriguing anion binding chemistry that distinguishes this system from more commonly studied porphyrinoids.
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40
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Nardis S, Stefanelli M, Mohite P, Pomarico G, Tortora L, Manowong M, Chen P, Kadish KM, Fronczek FR, McCandless GT, Smith KM, Paolesse R. β-Nitro derivatives of iron corrolates. Inorg Chem 2012; 51:3910-20. [PMID: 22394192 PMCID: PMC3307940 DOI: 10.1021/ic3002459] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Two different methods for the regioselective nitration of different meso-triarylcorroles leading to the corresponding β-substituted nitrocorrole iron complexes have been developed. A two-step procedure affords three Fe(III) nitrosyl products-the unsubstituted corrole, the 3-nitrocorrole, and the 3,17-dinitrocorrole. In contrast, a one-pot synthetic approach drives the reaction almost exclusively to formation of the iron nitrosyl 3,17-dinitrocorrole. Electron-releasing substituents on the meso-aryl groups of the triarylcorroles induce higher yields and longer reaction times than what is observed for the synthesis of similar triarylcorroles with electron-withdrawing functionalities, and these results can be confidently attributed to the facile formation and stabilization of an intermediate iron corrole π-cation radical. Electron-withdrawing substituents on the meso-aryl groups of triarylcorrole also seem to labilize the axial nitrosyl group which, in the case of the pentafluorophenylcorrole derivative, results in the direct formation of a disubstituted iron μ-oxo dimer complex. The influence of meso-aryl substituents on the progress and products of the nitration reaction was investigated. In addition, to elucidate the most important factors which influence the redox reactivity of these different iron nitrosyl complexes, selected compounds were examined by cyclic voltammetry and thin-layer UV-visible or FTIR spectroelectrochemistry in CH(2)Cl(2).
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Affiliation(s)
- Sara Nardis
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica, 1, 00133 Rome, Italy
| | - Manuela Stefanelli
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica, 1, 00133 Rome, Italy
| | - Pruthviraj Mohite
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica, 1, 00133 Rome, Italy
| | - Giuseppe Pomarico
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica, 1, 00133 Rome, Italy
| | - Luca Tortora
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica, 1, 00133 Rome, Italy
| | - Machima Manowong
- Department of Chemistry, University of Houston, Houston, Texas, 77204-5003 USA
| | - Ping Chen
- Department of Chemistry, University of Houston, Houston, Texas, 77204-5003 USA
| | - Karl M. Kadish
- Department of Chemistry, University of Houston, Houston, Texas, 77204-5003 USA
| | - Frank R. Fronczek
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803 USA
| | - Gregory T. McCandless
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803 USA
| | - Kevin M. Smith
- Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803 USA
| | - Roberto Paolesse
- Dipartimento di Scienze e Tecnologie Chimiche, Università di Roma Tor Vergata, via della Ricerca Scientifica, 1, 00133 Rome, Italy
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41
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Camp C, Mougel V, Horeglad P, Pécaut J, Mazzanti M. Multielectron Redox Reactions Involving C−C Coupling and Cleavage in Uranium Schiff Base Complexes. J Am Chem Soc 2010; 132:17374-7. [DOI: 10.1021/ja1089364] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Clément Camp
- Laboratoire de Reconnaissance Ionique et Chimie de Coordination, Service de Chimie Inorganique et Biologique, UMR E-3 CEA/UJF, FRE3200 CNRS, CEA-Grenoble, INAC, 17 rue des Martyrs, 38054 Grenoble cedex 9, France
| | - Victor Mougel
- Laboratoire de Reconnaissance Ionique et Chimie de Coordination, Service de Chimie Inorganique et Biologique, UMR E-3 CEA/UJF, FRE3200 CNRS, CEA-Grenoble, INAC, 17 rue des Martyrs, 38054 Grenoble cedex 9, France
| | - Pawel Horeglad
- Laboratoire de Reconnaissance Ionique et Chimie de Coordination, Service de Chimie Inorganique et Biologique, UMR E-3 CEA/UJF, FRE3200 CNRS, CEA-Grenoble, INAC, 17 rue des Martyrs, 38054 Grenoble cedex 9, France
| | - Jacques Pécaut
- Laboratoire de Reconnaissance Ionique et Chimie de Coordination, Service de Chimie Inorganique et Biologique, UMR E-3 CEA/UJF, FRE3200 CNRS, CEA-Grenoble, INAC, 17 rue des Martyrs, 38054 Grenoble cedex 9, France
| | - Marinella Mazzanti
- Laboratoire de Reconnaissance Ionique et Chimie de Coordination, Service de Chimie Inorganique et Biologique, UMR E-3 CEA/UJF, FRE3200 CNRS, CEA-Grenoble, INAC, 17 rue des Martyrs, 38054 Grenoble cedex 9, France
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42
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Bhattacharya D, Sarkar S. Synthesis, Structural, Redox and Mössbauer Characterization of Four‐Electron‐Oxidized Tetrakis(cyclohexyl)iron(II)porphodimethene with Different Axial Ligations. Eur J Inorg Chem 2010. [DOI: 10.1002/ejic.201000267] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Dibyendu Bhattacharya
- Department of Chemistry, Indian Institute of Technology – Kanpur, Kanpur 208016, Uttar Pradesh, India, Fax: +91‐512‐2597265
| | - Sabyasachi Sarkar
- Department of Chemistry, Indian Institute of Technology – Kanpur, Kanpur 208016, Uttar Pradesh, India, Fax: +91‐512‐2597265
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43
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Zhou Z, Cao C, Liu Q, Jiang R. Hybrid Orbital Deformation (HOD) Effect and Spectral Red-Shift Property of Nonplanar porphyrin. Org Lett 2010; 12:1780-3. [DOI: 10.1021/ol100434w] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Zaichun Zhou
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China, Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, Hunan University of Science and Technology, China, and Hunan Provincial University Key Laboratory of QSAR/QSPR, China
| | - Chenzhong Cao
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China, Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, Hunan University of Science and Technology, China, and Hunan Provincial University Key Laboratory of QSAR/QSPR, China
| | - Qiuhua Liu
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China, Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, Hunan University of Science and Technology, China, and Hunan Provincial University Key Laboratory of QSAR/QSPR, China
| | - Rongqing Jiang
- School of Chemistry and Chemical Engineering, Hunan University of Science and Technology, Xiangtan 411201, China, Key Laboratory of Theoretical Chemistry and Molecular Simulation of Ministry of Education, Hunan University of Science and Technology, China, and Hunan Provincial University Key Laboratory of QSAR/QSPR, China
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44
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Sazama GT, Betley TA. Ligand-Centered Redox Activity: Redox Properties of 3d Transition Metal Ions Ligated by the Weak-Field Tris(pyrrolyl)ethane Trianion. Inorg Chem 2010; 49:2512-24. [DOI: 10.1021/ic100028y] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Graham T. Sazama
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, 306E Mallinckrodt, Cambridge, Massachusetts 02138
| | - Theodore A. Betley
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, 306E Mallinckrodt, Cambridge, Massachusetts 02138
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45
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Lee GA, Wang WC, Shieh M, Kuo TS. A novel synthesis of calix[4]thiophenes and calix[4]furans. Chem Commun (Camb) 2010; 46:5009-11. [DOI: 10.1039/c0cc00437e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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46
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Gomes CSB, Suresh D, Gomes PT, Veiros LF, Duarte MT, Nunes TG, Oliveira MC. Sodium complexes containing 2-iminopyrrolyl ligands: the influence of steric hindrance in the formation of coordination polymers. Dalton Trans 2010; 39:736-48. [PMID: 20066219 DOI: 10.1039/b905948b] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Clara S B Gomes
- Centro de Química Estrutural, Departamento de Engenharia Química e Biológica, Instituto Superior Técnico, Av. Rovisco Pais, 1049-001 Lisboa, Portugal
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47
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Abstract
Personalized energy (PE) is a transformative idea that provides a new modality for the planet's energy future. By providing solar energy to the individual, an energy supply becomes secure and available to people of both legacy and nonlegacy worlds and minimally contributes to an increase in the anthropogenic level of carbon dioxide. Because PE will be possible only if solar energy is available 24 h a day, 7 days a week, the key enabler for solar PE is an inexpensive storage mechanism. HY (Y = halide or OH(-)) splitting is a fuel-forming reaction of sufficient energy density for large-scale solar storage, but the reaction relies on chemical transformations that are not understood at the most basic science level. Critical among these are multielectron transfers that are proton-coupled and involve the activation of bonds in energy-poor substrates. The chemistry of these three italicized areas is developed, and from this platform, discovery paths leading to new hydrohalic acid- and water-splitting catalysts are delineated. The latter water-splitting catalyst captures many of the functional elements of photosynthesis. In doing so, a highly manufacturable and inexpensive method for solar PE storage has been discovered.
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Affiliation(s)
- Daniel G Nocera
- Department of Chemistry, 6-335, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139-4307, USA.
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48
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King ER, Betley TA. Unusual Electronic Structure of First Row Transition Metal Complexes Featuring Redox-Active Dipyrromethane Ligands. J Am Chem Soc 2009; 131:14374-80. [DOI: 10.1021/ja903997a] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Evan R. King
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, 306E Mallinckrodt, Cambridge, Massachusetts 02138
| | - Theodore A. Betley
- Department of Chemistry and Chemical Biology, Harvard University, 12 Oxford Street, 306E Mallinckrodt, Cambridge, Massachusetts 02138
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49
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Radosevich AT, Melnick JG, Stoian SA, Bacciu D, Chen CH, Foxman BM, Ozerov OV, Nocera DG. Ligand Reactivity in Diarylamido/Bis(Phosphine) PNP Complexes of Mn(CO)3 and Re(CO)3. Inorg Chem 2009; 48:9214-21. [DOI: 10.1021/ic9010218] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexander T. Radosevich
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Jonathan G. Melnick
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Sebastian A. Stoian
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
| | - Deborha Bacciu
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454
| | - Chun-Hsing Chen
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454
| | - Bruce M. Foxman
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454
| | - Oleg V. Ozerov
- Department of Chemistry, Brandeis University, 415 South Street, Waltham, Massachusetts 02454
- Department of Chemistry, Texas A&M University, College Station, Texas 77842
| | - Daniel G. Nocera
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139
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50
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Singh J, Hundal G, Gupta R. Mononuclear and Dinuclear NiIIand CuIIComplexes with a Pyrrolecarboxamide Ligand: Core Conversions and Unusual Presence of a Dimer and Two Monomers in the Same Unit Cell. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900265] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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