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Shetgaonkar SE, Mamgain R, Kikushima K, Dohi T, Singh FV. Palladium-Catalyzed Organic Reactions Involving Hypervalent Iodine Reagents. Molecules 2022; 27:3900. [PMID: 35745020 DOI: 10.3390/molecules27123900] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 06/07/2022] [Accepted: 06/11/2022] [Indexed: 01/13/2023]
Abstract
The chemistry of polyvalent iodine compounds has piqued the interest of researchers due to their role as important and flexible reagents in synthetic organic chemistry, resulting in a broad variety of useful organic molecules. These chemicals have potential uses in various functionalization procedures due to their non-toxic and environmentally friendly properties. As they are also strong electrophiles and potent oxidizing agents, the use of hypervalent iodine reagents in palladium-catalyzed transformations has received a lot of attention in recent years. Extensive research has been conducted on the subject of C—H bond functionalization by Pd catalysis with hypervalent iodine reagents as oxidants. Furthermore, the iodine(III) reagent is now often used as an arylating agent in Pd-catalyzed C—H arylation or Heck-type cross-coupling processes. In this article, the recent advances in palladium-catalyzed oxidative cross-coupling reactions employing hypervalent iodine reagents are reviewed in detail.
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Mou T, Quiroz J, Camargo PHC, Wang B. Localized Orbital Excitation Drives Bond Formation in Plasmonic Catalysis. ACS Appl Mater Interfaces 2021; 13:60115-60124. [PMID: 34874713 DOI: 10.1021/acsami.1c21607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Localized surface plasmons generated on metallic nanostructures can be used to accelerate molecular transformations; however, the efficiency is limited by the challenge to control the energy/charge transfer at the interfaces. Here, we combine density functional theory (DFT) calculations and experiments to reveal the mechanism of nitrophenol reduction on Au nanoparticles under visible-light irradiation and propose a strategy to further enhance the reaction rates. DFT calculations show a reduced activation barrier under electronic excitation on Au(111), thus explaining the measured higher rates under visible-light irradiation. Furthermore, we propose a heterostructure with Au nanoparticles covered by a thin film of hexagonal boron nitride; the latter is used to decouple the molecular orbitals from the metal to enable charge localization in the molecule. DFT calculations show that by this electronic decoupling, the activation barrier can be lowered by a factor of five. This work thus provides a valuable strategy for optimizing catalytic efficiency in plasmonic photocatalysis.
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Affiliation(s)
- Tong Mou
- Center for Interfacial Reaction Engineering and School of Chemical, Biological and Materials Engineering, Gallogly College of Engineering, University of Oklahoma, Norman, Oklahoma 73019, United States
- Shenzhen JL Computational Science and Applied Research Institute, Shenzhen, Guangdong 518131, China
| | - Jhon Quiroz
- Department of Chemistry, University of Helsinki, 00560 Helsinki, Finland
| | - Pedro H C Camargo
- Department of Chemistry, University of Helsinki, 00560 Helsinki, Finland
| | - Bin Wang
- Center for Interfacial Reaction Engineering and School of Chemical, Biological and Materials Engineering, Gallogly College of Engineering, University of Oklahoma, Norman, Oklahoma 73019, United States
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Uchikura T, Hara Y, Tsubono K, Akiyama T. Visible-Light-Driven C-S Bond Formation Based on Electron Donor-Acceptor Excitation and Hydrogen Atom Transfer Combined System. ACS Org Inorg Au 2021; 1:23-28. [PMID: 36855634 PMCID: PMC9954416 DOI: 10.1021/acsorginorgau.1c00007] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Developed herein is a visible-light-driven synthesis of sulfides by an electron donor-acceptor/single electron transfer and hydrogen atom transfer combined system without transition metals and strong oxidants. This reaction proceeds through the excitation of an electron donor-acceptor complex between a thiolate and an aryl halide, followed by the hydrogen atom transfer from an alkane to the generated aryl radical.
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Huang CJ, Lin KY, Hsieh YC, Su WN, Wang CH, Brunklaus G, Winter M, Jiang JC, Hwang BJ. New Insights into the N-S Bond Formation of a Sulfurized-Polyacrylonitrile Cathode Material for Lithium-Sulfur Batteries. ACS Appl Mater Interfaces 2021; 13:14230-14238. [PMID: 33750110 DOI: 10.1021/acsami.0c22811] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Sulfurized polyacrylonitrile (S-cPAN) has been recognized as a particularly promising cathode material for lithium-sulfur (Li-S) batteries due to its ultra-stable cycling performance and high degree of sulfur utilization. Though the synthetic conditions and routes for modification of S-cPAN have been extensively studied, details of the molecular structure of S-cPAN remain yet unclear. Herein, a more reasonable molecular structure consisting of pyridinic/pyrrolic nitrogen (NPD/NPL) is proposed, based on the analysis of combined X-ray photoelectron spectroscopy, 13C/15N solid-state nuclear magnetic resonance, and density functional theory data. The coexistence of vicinal NPD/NPL entities plays a vital role in attracting S2 molecules and facilitating N-S bond formation apart from the generally accepted C-S bond in S-cPAN, which could explain the extraordinary electrochemical features of S-cPAN among various nitrogen-containing sulfurized polymers. This study provides new insights and a better understanding of structural details and relevant bond formation mechanisms in S-cPAN, providing a foundation for the design of new types of sulfurized cathode materials suitable for application in next-generation high-performance Li-S batteries.
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Affiliation(s)
- Chen-Jui Huang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Sustainable Energy Development Center, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Kuan-Yu Lin
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Yi-Chen Hsieh
- Helmholtz Institute Münster (IEK-12), Forschungszentrum Jülich GmbH, Corrensstr. 46, Münster 48149, Germany
| | - Wei-Nien Su
- Sustainable Energy Development Center, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Chia-Hsin Wang
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
| | - Gunther Brunklaus
- Helmholtz Institute Münster (IEK-12), Forschungszentrum Jülich GmbH, Corrensstr. 46, Münster 48149, Germany
- MEET Battery Research Center, Institute of Physical Chemistry, University of Münster, Corrensstr. 46, Münster 48149, Germany
| | - Martin Winter
- Helmholtz Institute Münster (IEK-12), Forschungszentrum Jülich GmbH, Corrensstr. 46, Münster 48149, Germany
- MEET Battery Research Center, Institute of Physical Chemistry, University of Münster, Corrensstr. 46, Münster 48149, Germany
| | - Jyh-Chiang Jiang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
| | - Bing Joe Hwang
- Department of Chemical Engineering, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Sustainable Energy Development Center, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan
- National Synchrotron Radiation Research Center (NSRRC), Hsinchu 30076, Taiwan
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Abstract
Hypervalent iodine compounds are valuable and versatile reagents in synthetic organic chemistry, generating a diverse array of useful organic molecules. Owing to their non-toxic and environmentally friendly features, these reagents find potential applications in various oxidative functionalization reactions. In recent years, the use of hypervalent iodine reagents in palladium-catalyzed transformations has been widely studied as they are strong electrophiles and powerful oxidizing agents. For instance, extensive work has been carried out in the field of C–H bond functionalization via Pd-catalysis using hypervalent iodine reagents as oxidants. In addition, nowadays, iodine(III) reagents have been frequently employed as arylating agents in Pd-catalyzed C–H arylation or Heck-type cross-coupling reactions. In this review, recent advancements in the area of palladium-catalyzed oxidative cross-coupling reactions using hypervalent iodine reagents are summarized in detail.
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Affiliation(s)
- Samata E Shetgaonkar
- Chemistry Division, School of Advanced Science, Vellore Institute of Technology, Chennai, India
| | - Fateh V Singh
- Chemistry Division, School of Advanced Science, Vellore Institute of Technology, Chennai, India
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Abstract
Recent years have witnessed remarkable advances in radical reactions involving main-group metal complexes. This includes the isolation and detailed characterization of main-group metal radical compounds, but also the generation of highly reactive persistent or transient radical species. A rich arsenal of methods has been established that allows control over and exploitation of their unusual reactivity patterns. Thus, main-group metal compounds have entered the field of selective bond formations in controlled radical reactions. Transformations that used to be the domain of late transition-metal compounds have been realized, and unusual selectivities, high activities, as well as remarkable functional-group tolerances have been reported. Recent findings demonstrate the potential of main-group metal compounds to become standard tools of synthetic chemistry, catalysis, and materials science, when operating through radical pathways.
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Affiliation(s)
- Crispin Lichtenberg
- Institute of Inorganic ChemistryJulius-Maximilians-University WürzburgAm Hubland97074WürzburgGermany
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Singh N, Formon GJM, De Piccoli S, Hermans TM. Devising Synthetic Reaction Cycles for Dissipative Nonequilibrium Self-Assembly. Adv Mater 2020; 32:e1906834. [PMID: 32064688 DOI: 10.1002/adma.201906834] [Citation(s) in RCA: 79] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 11/21/2019] [Indexed: 05/04/2023]
Abstract
Fuel-driven reaction cycles are found in biological systems to control the assembly and disassembly of supramolecular materials such as the cytoskeleton. Fuel molecules can bind noncovalently to a self-assembling building block or they can react with it, resulting in covalent modifications. Overall the fuel can either switch the self-assembly process on or off. Here, a closer look is taken at artificial systems that mimic biological systems by making and breaking covalent bonds in a self-assembling motif. The different chemistries used so far are highlighted in chronological order and the pros and cons of each system are discussed. Moreover, the desired traits of future reaction cycles, their fuels, and waste management are outlined, and two chemistries that have not been explored up to now in chemically fueled dissipative self-assembly are suggested.
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Affiliation(s)
- Nishant Singh
- Université de Strasbourg, 8 allée Gaspard Monge, 67000, Strasbourg, France
| | - Georges J M Formon
- Université de Strasbourg, 8 allée Gaspard Monge, 67000, Strasbourg, France
| | - Serena De Piccoli
- Université de Strasbourg, 8 allée Gaspard Monge, 67000, Strasbourg, France
| | - Thomas M Hermans
- Université de Strasbourg, 8 allée Gaspard Monge, 67000, Strasbourg, France
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Ončák M, Meißner R, Arthur-Baidoo E, Denifl S, Luxford TFM, Pysanenko A, Fárník M, Pinkas J, Kočišek J. Ring Formation and Hydration Effects in Electron Attachment to Misonidazole. Int J Mol Sci 2019; 20:E4383. [PMID: 31489947 PMCID: PMC6770096 DOI: 10.3390/ijms20184383] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 09/02/2019] [Accepted: 09/03/2019] [Indexed: 12/14/2022] Open
Abstract
We study the reactivity of misonidazole with low-energy electrons in a water environment combining experiment and theoretical modelling. The environment is modelled by sequential hydration of misonidazole clusters in vacuum. The well-defined experimental conditions enable computational modeling of the observed reactions. While the NO 2 - dissociative electron attachment channel is suppressed, as also observed previously for other molecules, the OH - channel remains open. Such behavior is enabled by the high hydration energy of OH - and ring formation in the neutral radical co-fragment. These observations help to understand the mechanism of bio-reductive drug action. Electron-induced formation of covalent bonds is then important not only for biological processes but may find applications also in technology.
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Affiliation(s)
- Milan Ončák
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens Universität Innsbruck, Technikerstrasse 25, Innsbruck A-6020, Austria.
| | - Rebecca Meißner
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens Universität Innsbruck, Technikerstrasse 25, Innsbruck A-6020, Austria.
- Atomic and Molecular Collisions Laboratory, CEFITEC, Department of Physics, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal.
| | - Eugene Arthur-Baidoo
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens Universität Innsbruck, Technikerstrasse 25, Innsbruck A-6020, Austria.
| | - Stephan Denifl
- Institut für Ionenphysik und Angewandte Physik, Leopold-Franzens Universität Innsbruck, Technikerstrasse 25, Innsbruck A-6020, Austria.
- Center for Biomolecular Sciences Innsbruck, Leopold-Franzens Universität Innsbruck, Technikerstrasse 25, Innsbruck A-6020, Austria.
| | - Thomas F M Luxford
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic.
| | - Andriy Pysanenko
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic.
| | - Michal Fárník
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic.
| | - Jiří Pinkas
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic.
| | - Jaroslav Kočišek
- J. Heyrovský Institute of Physical Chemistry v.v.i., The Czech Academy of Sciences, Dolejškova 3, 18223 Prague, Czech Republic.
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Abstract
A new boron-boron dehydrocoupling strategy was established, providing convenient access to some diborane(4) compounds starting from simple borane adducts under mild conditions. In contrast to the traditional pathway using a reducing reagent, the reduction from BIII to BII was paradoxically initiated by the addition of the oxidation-reagent iodine. A reaction pathway for this unusual reaction was proposed based on quantum-chemical calculations.
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Affiliation(s)
- Jana Elias
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Elisabeth Kaifer
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Hans-Jörg Himmel
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
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Abstract
Non-noble metal catalysts based on pincer type compounds are of special interest for organometallic chemistry and organic synthesis. Next to iron and manganese, currently cobalt-pincer type complexes are successfully applied in various catalytic reactions. In this review the recent progress in (de)hydrogenation, transfer hydrogenation, hydroboration and hydrosilylation as well as dehydrogenative coupling reactions using cobalt-pincer complexes is summarised.
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Affiliation(s)
- Kathrin Junge
- Leibniz-Institut für Katalyse e.V. an der, Universität Rostock, Albert-Einstein-Straße 29a, 18055, Rostock, Germany
| | - Veronica Papa
- Leibniz-Institut für Katalyse e.V. an der, Universität Rostock, Albert-Einstein-Straße 29a, 18055, Rostock, Germany
| | - Matthias Beller
- Leibniz-Institut für Katalyse e.V. an der, Universität Rostock, Albert-Einstein-Straße 29a, 18055, Rostock, Germany
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