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Yamaji M, Tojo S, Majima T, Fujitsuka M. Mesolysis of an asymmetric diphenyldisulfide radical anion studied by γ-ray and pulsed-electron radiolyses. Phys Chem Chem Phys 2023; 25:9152-9157. [PMID: 36942738 DOI: 10.1039/d3cp00780d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/12/2023]
Abstract
Diaryldisulfides are known to undergo S-S bond cleavage upon one-electron reduction, which is called mesolysis of radical anions, to form the corresponding arylthiyl radical and anion. In this study, we prepared (4-cyanophenyl)(4'-methoxyphenyl)disulfide (MeOSSCN), and the mesolytic profiles were investigated by γ-ray and pulsed-electron radiolyses in 2-methyltetrahydrofuran. As a result of radiolysis of MeOSSCN at room and lower temperatures, the formation of the methoxythiyl radical was recognized upon mesolysis of the radical anion. This observation indicated that intramolecular electron transfer in the radical anion occurred, and the stepwise mechanism was operative after the attached electron occupied the antibonding σ*-orbital for promoting the S-S bond cleavage. According to the Arrhenius expression for the decay rates of the radical anion, the activation energy and frequency factor were determined. DFT calculations provided the bond dissociation energy and bond length for the S-S bond and charge distribution on the S atoms in the radical anion. The substituent effects on the mesolysis process are discussed.
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Affiliation(s)
- Minoru Yamaji
- Division of Molecular Science, Graduate School of Science and Engineering, Gunma University, Ota, Gunma 373-0057, Japan.
| | - Sachiko Tojo
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Tetsuro Majima
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Mamoru Fujitsuka
- SANKEN (The Institute of Scientific and Industrial Research), Osaka University, Ibaraki, Osaka 567-0047, Japan
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2
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Rösel S, Schreiner PR. Computational Chemistry as a Conceptual Game Changer: Understanding the Role of London Dispersion in Hexaphenylethane Derivatives (Gomberg Systems). Isr J Chem 2022. [DOI: 10.1002/ijch.202200002] [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)
- Sören Rösel
- Institute of Organic Chemistry Justus Liebig University Heinrich-Buff-Ring 17, Twitter: @prsgroupjlu 35392 Giessen Germany
| | - Peter R. Schreiner
- Institute of Organic Chemistry Justus Liebig University Heinrich-Buff-Ring 17, Twitter: @prsgroupjlu 35392 Giessen Germany
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Yamaji M, Tojo S, Fujitsuka M, Sugimoto A, Majima T. Mesolysis Processes with Benzylic Carbon–Oxygen Bond Cleavage in Radical Anions of Aryl Benzyl Ethers Studied by Electron Pulse Radiolysis in DMF. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2016. [DOI: 10.1246/bcsj.20160100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Bull JN, West CW, Verlet JRR. Ultrafast dynamics of formation and autodetachment of a dipole-bound state in an open-shell π-stacked dimer anion. Chem Sci 2016; 7:5352-5361. [PMID: 30155188 PMCID: PMC6020752 DOI: 10.1039/c6sc01062h] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2016] [Accepted: 04/23/2016] [Indexed: 12/15/2022] Open
Abstract
Isolated π-stacked dimer radical anions present the simplest model of an excess electron in a π-stacked environment. Here, frequency-, angle-, and time-resolved photoelectron imaging together with electronic structure calculations have been used to characterise the π-stacked coenzyme Q0 dimer radical anion and its exited state dynamics. In the ground electronic state, the excess electron is localised on one monomer with a planar para-quinone ring, which is solvated by the second monomer in which carbonyl groups are bent out of the para-quinone ring plane. Through the π-stacking interaction, the dimer anion exhibits a number of charge-transfer (intermolecular) valence-localised resonances situated in the detachment continuum that undergo efficient internal conversion to a cluster dipole-bound state (DBS) on a ∼60 fs timescale. In turn, the DBS undergoes vibration-mediated autodetachment on a 2.0 ± 0.2 ps timescale. Experimental vibrational structure and supporting calculations assign the intermolecular dynamics to be facilitated by vibrational wagging modes of the carbonyl groups on the non-planar monomer. At photon energies ∼0.6-1.0 eV above the detachment threshold, a competition between photoexcitation of an intermolecular resonance leading to the DBS, and photoexcitation of an intramolecular resonance leading to monomer-like dynamics further illustrates the π-stacking specific dynamics. Overall, this study provides the first direct observation of both internal conversion of resonances into a DBS, and characterisation of a vibration-mediated autodetachment in real-time.
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Affiliation(s)
- James N Bull
- Department of Chemistry , Durham University , South Road , Durham DH1 3LE , UK .
| | - Christopher W West
- Department of Chemistry , Durham University , South Road , Durham DH1 3LE , UK .
| | - Jan R R Verlet
- Department of Chemistry , Durham University , South Road , Durham DH1 3LE , UK .
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Ma J, Archirel P, Pernot P, Schmidhammer U, Le Caër S, Mostafavi M. Identification of Transient Radical Anions (LiClO4)n– (n = 1–3) in THF Solutions: Experimental and Theoretical Investigation on Electron Localization in Oligomers. J Phys Chem B 2016; 120:773-84. [DOI: 10.1021/acs.jpcb.5b11315] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Jun Ma
- Laboratoire de
Chimie Physique/ELYSE, UMR 8000, CNRS/Univ. Paris-Sud, Bât. 349, 91405 Orsay, Cedex, France
| | - Pierre Archirel
- Laboratoire de
Chimie Physique/ELYSE, UMR 8000, CNRS/Univ. Paris-Sud, Bât. 349, 91405 Orsay, Cedex, France
| | - Pascal Pernot
- Laboratoire de
Chimie Physique/ELYSE, UMR 8000, CNRS/Univ. Paris-Sud, Bât. 349, 91405 Orsay, Cedex, France
| | - Uli Schmidhammer
- Laboratoire de
Chimie Physique/ELYSE, UMR 8000, CNRS/Univ. Paris-Sud, Bât. 349, 91405 Orsay, Cedex, France
| | - Sophie Le Caër
- CEA/Saclay,
DSM/IRAMIS/NIMBE
UMR 3685/LIONS, Bât. 546, F-91191 Gif-sur-Yvette, Cedex, France
| | - Mehran Mostafavi
- Laboratoire de
Chimie Physique/ELYSE, UMR 8000, CNRS/Univ. Paris-Sud, Bât. 349, 91405 Orsay, Cedex, France
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Yamaji M, Tojo S, Fujitsuka M, Sugimoto A, Majima T. Mesolysis Mechanisms of Aromatic Thioether Radical Anions Studied by Pulse Radiolysis and DFT Calculations. J Org Chem 2015. [PMID: 26217961 DOI: 10.1021/acs.joc.5b00660] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The mesolysis mechanisms for eight aromatic thioether radical anions (ArCH2SAr'(•-)) generated during radiolysis in 2-methyltetrahydrofuran were studied by spectroscopic measurements and DFT calculation. Seven of ArCH2SAr'(•-) underwent mesolysis via dissociation of the σ-bond between the benzylic carbon and sulfur atoms, forming the corresponding radical and anion with the stepwise mechanism or concerted mechanism. Conversely, no mesolysis in the benzyl β-naphthyl sulfide radical anion was found. From the Arrhenius analysis of the mesolysis with the stepwise mechanism, apparent activation energies (ΔEexp) were determined and compared with those (ΔEcal) estimated by the DFT calculations. Two types of C-S bond dissociation are possible to give the C radical and S anion (ArCH2(•)/Ar'S(-)) and the C anion and S radical (ArCH2(-)/Ar'S(•)). The dissociation energies (BDE(ArCH2(•)/Ar'S(-)) and BDE(ArCH2(-)/Ar'S(•))) were estimated by the DFT calculations, and BDE(ArCH2(•)/Ar'S(-)) were found to be smaller than BDE(ArCH2(-)/Ar'S(•)). The formation of ArCH2(•)/Ar'S(-) was observed on the mesolysis of five ArCH2SAr'(•-), while one ArCH2SAr'(•-) provided ArCH2(-)/Ar'S(•). Chemical properties governing the mesolysis mechanisms of ArCH2SAr'(•-) are discussed.
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Affiliation(s)
- Minoru Yamaji
- †Division of Molecular Science, Graduate School of Science and Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Sachiko Tojo
- ‡The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Mamoru Fujitsuka
- ‡The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Akira Sugimoto
- ‡The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Ibaraki, Osaka 567-0047, Japan
| | - Tetsuro Majima
- ‡The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Ibaraki, Osaka 567-0047, Japan
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Tojo S, Fujitsuka M, Ouchi A, Majima T. Selenium–Selenium Bond Cleavage of Diaryl Diselenide Radical Anions During Pulse Radiolysis. Chempluschem 2014. [DOI: 10.1002/cplu.201402300] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Sachiko Tojo
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8‐1, Ibaraki, Osaka 567‐0047 (Japan)
| | - Mamoru Fujitsuka
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8‐1, Ibaraki, Osaka 567‐0047 (Japan)
| | - Akihiko Ouchi
- The National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki 305‐8565 (Japan)
| | - Tetsuro Majima
- The Institute of Scientific and Industrial Research (SANKEN), Osaka University, Mihogaoka 8‐1, Ibaraki, Osaka 567‐0047 (Japan)
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