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Zhu Y, Borstelmann J, Bertleff O, Bergner J, Wei Z, Neiss C, Görling A, Kivala M, Petrukhina MA. Unveiling the Multielectron Acceptor Properties of π-Expanded Pyracylene: Reversible Boat to Chair Conversion. J Am Chem Soc 2024; 146:14715-14723. [PMID: 38741481 PMCID: PMC11140751 DOI: 10.1021/jacs.4c02314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Revised: 05/04/2024] [Accepted: 05/06/2024] [Indexed: 05/16/2024]
Abstract
In this work, the chemical reduction of a hybrid pyracylene-hexa-peri-hexabenzocoronene (HPH) nanographene was investigated with different alkali metals (Na, K, Rb) to reveal its remarkable multielectron acceptor abilities. The UV-vis and 1H NMR spectroscopy monitoring of the stepwise reduction reactions supports the existence of all intermediate reduction states up to the hexaanion for HPH. Tuning the experimental conditions enabled the synthesis of the HPH anions with gradually increasing reduction states (up to -5) isolated with different alkali metal ions as crystalline materials. The single-crystal X-ray diffraction structure analysis demonstrates that the highly negatively charged HPH anions (-4 and -5) exhibit a drastic geometry change from boat-shaped (observed in the neutral parent, mono- and dianions) to a chair conformation, which was proved to be fully reversible by NMR spectroscopy. DFT calculations show that this geometry change is induced by an enhanced interaction between the coordinated metal ions and negatively charged HPH core in the chair conformation.
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Affiliation(s)
- Yikun Zhu
- Department
of Chemistry, University at Albany, State
University of New York, Albany, New York 12222, United States
| | - Jan Borstelmann
- Organisch-Chemisches
Institut, Universität Heidelberg, Im Neuenheimer Feld 270, Heidelberg 69120, Germany
| | - Oliver Bertleff
- Lehrstuhl
für Theoretische Chemie, Friedrich-Alexander
Universität Erlangen-Nürnberg (FAU), Egerlandstraße 3, Erlangen 91058, Germany
| | - John Bergner
- Organisch-Chemisches
Institut, Universität Heidelberg, Im Neuenheimer Feld 270, Heidelberg 69120, Germany
| | - Zheng Wei
- Department
of Chemistry, University at Albany, State
University of New York, Albany, New York 12222, United States
| | - Christian Neiss
- Lehrstuhl
für Theoretische Chemie, Friedrich-Alexander
Universität Erlangen-Nürnberg (FAU), Egerlandstraße 3, Erlangen 91058, Germany
| | - Andreas Görling
- Lehrstuhl
für Theoretische Chemie, Friedrich-Alexander
Universität Erlangen-Nürnberg (FAU), Egerlandstraße 3, Erlangen 91058, Germany
- Erlangen
National High Performance Computing Center (NHR@FAU), Martensstr. 1, Erlangen 91058, Germany
| | - Milan Kivala
- Organisch-Chemisches
Institut, Universität Heidelberg, Im Neuenheimer Feld 270, Heidelberg 69120, Germany
| | - Marina A. Petrukhina
- Department
of Chemistry, University at Albany, State
University of New York, Albany, New York 12222, United States
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Zhou Z, Fernández‐García JM, Zhu Y, Evans PJ, Rodríguez R, Crassous J, Wei Z, Fernández I, Petrukhina MA, Martín N. Site‐Specific Reduction‐Induced Hydrogenation of a Helical Bilayer Nanographene with K and Rb Metals: Electron Multiaddition and Selective Rb
+
Complexation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Zheng Zhou
- Department of Chemistry University at Albany State University of New York Albany NY 12222 USA
- School of Materials Science and Engineering Tongji University 4800 Cao'an Road Shanghai 201804 China
| | - Jesús M. Fernández‐García
- Departamento de Química Orgánica I Facultad de Ciencias Químicas Universidad Complutense de Madrid Ciudad Universitaria s/n 28040 Madrid Spain
| | - Yikun Zhu
- Department of Chemistry University at Albany State University of New York Albany NY 12222 USA
| | - Paul J. Evans
- Departamento de Química Orgánica I Facultad de Ciencias Químicas Universidad Complutense de Madrid Ciudad Universitaria s/n 28040 Madrid Spain
| | - Rafael Rodríguez
- Institut des Sciences Chimiques de Rennes UMR 6226 CNRS—Univ. Rennes Campus de Beaulieu 35042 Rennes Cedex France
| | - Jeanne Crassous
- Institut des Sciences Chimiques de Rennes UMR 6226 CNRS—Univ. Rennes Campus de Beaulieu 35042 Rennes Cedex France
| | - Zheng Wei
- Department of Chemistry University at Albany State University of New York Albany NY 12222 USA
| | - Israel Fernández
- Departamento de Química Orgánica I Facultad de Ciencias Químicas Universidad Complutense de Madrid Ciudad Universitaria s/n 28040 Madrid Spain
| | - Marina A. Petrukhina
- Department of Chemistry University at Albany State University of New York Albany NY 12222 USA
| | - Nazario Martín
- Departamento de Química Orgánica I Facultad de Ciencias Químicas Universidad Complutense de Madrid Ciudad Universitaria s/n 28040 Madrid Spain
- IMDEA-Nanociencia Campus de la Universidad Autónoma de Madrid C/Faraday, 9 28049 Madrid Spain
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3
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Zhou Z, Fernández-García JM, Zhu Y, Evans PJ, Rodríguez R, Crassous J, Wei Z, Fernández I, Petrukhina MA, Martín N. Site-Specific Reduction-Induced Hydrogenation of a Helical Bilayer Nanographene with K and Rb Metals: Electron Multiaddition and Selective Rb + Complexation. Angew Chem Int Ed Engl 2021; 61:e202115747. [PMID: 34875130 PMCID: PMC9300088 DOI: 10.1002/anie.202115747] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2021] [Indexed: 01/01/2023]
Abstract
The chemical reduction of π‐conjugated bilayer nanographene 1 (C138H120) with K and Rb in the presence of 18‐crown‐6 affords [K+(18‐crown‐6)(THF)2][{K+(18‐crown‐6)}2(THF)0.5][C138H1223−] (2) and [Rb+(18‐crown‐6)2][{Rb+(18‐crown‐6)}2(C138H1223−)] (3). Whereas K+ cations are fully solvent‐separated from the trianionic core thus affording a “naked” 1.3− anion, Rb+ cations are coordinated to the negatively charged layers of 1.3−. According to DFT calculations, the localization of the first two electrons in the helicene moiety leads to an unprecedented site‐specific hydrogenation process at the carbon atoms located on the edge of the helicene backbone. This uncommon reduction‐induced site‐specific hydrogenation provokes dramatic changes in the (electronic) structure of 1 as the helicene backbone becomes more compressed and twisted upon chemical reduction, which results in a clear slippage of the bilayers.
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Affiliation(s)
- Zheng Zhou
- Department of Chemistry, University at Albany, State University of New York, Albany, NY 12222, USA.,School of Materials Science and Engineering, Tongji University, 4800 Cao'an Road, Shanghai, 201804, China
| | - Jesús M Fernández-García
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Yikun Zhu
- Department of Chemistry, University at Albany, State University of New York, Albany, NY 12222, USA
| | - Paul J Evans
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Rafael Rodríguez
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Univ. Rennes, Campus de Beaulieu, 35042, Rennes Cedex, France
| | - Jeanne Crassous
- Institut des Sciences Chimiques de Rennes, UMR 6226 CNRS-Univ. Rennes, Campus de Beaulieu, 35042, Rennes Cedex, France
| | - Zheng Wei
- Department of Chemistry, University at Albany, State University of New York, Albany, NY 12222, USA
| | - Israel Fernández
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain
| | - Marina A Petrukhina
- Department of Chemistry, University at Albany, State University of New York, Albany, NY 12222, USA
| | - Nazario Martín
- Departamento de Química Orgánica I, Facultad de Ciencias Químicas, Universidad Complutense de Madrid, Ciudad Universitaria s/n, 28040, Madrid, Spain.,IMDEA-Nanociencia, Campus de la Universidad Autónoma de Madrid, C/Faraday, 9, 28049, Madrid, Spain
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