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  Photoinduced host-to-guest electron transfer in a self-assembled coordination cage

Ganta, S., Borter, J.-H., Drechsler, C., Holstein, J. J., Schwarzer, D., & Clever, G. H. (2022). Photoinduced host-to-guest electron transfer in a self-assembled coordination cage. Organic Chemistry Frontiers, 9(20), 5485-5493. doi:10.1039/d2qo01339h.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000B-3DFA-8 Version Permalink: https://hdl.handle.net/21.11116/0000-0010-F74F-0
Genre: Journal Article

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 Creators:
Ganta, Sudhakar, Author
Borter, Jan-Hendrik1, Author           
Drechsler, Christoph, Author
Holstein, Julian J., Author
Schwarzer, D.1, Author                 
Clever, Guido H., Author
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1Department of Dynamics at Surfaces, Max Planck Institute for Multidisciplinary Sciences, Max Planck Society, ou_3350158              

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 Abstract: A [Pd2L4] coordination cage, assembled from electron-rich phenothiazine-based ligands and encapsulating an electron-deficient anthraquinone-based disulfonate guest, is reported. Upon excitation at 400 nm, transient absorption spectroscopy unveils photoinduced electron transfer from the host's chromophores to the guest, as indicated by characteristic spectral features assigned to the oxidized donor and reduced acceptor. The structure of the host–guest complex was characterized by NMR spectroscopy, mass spectrometry and single-crystal X-ray analysis. Spectroelectrochemical experiments and DFT calculations both agree with the proposed light-induced charge separation. A kinetic analysis of the involved charge transfer channels reveals, besides a guest-independent LMCT path, 44% efficiency for the host–guest charge transfer (HGCT).

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Language(s): eng - English
 Dates: 2022-08-24
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1039/d2qo01339h
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Project name : We thank the Deutsche Forschungsgemeinschaft (DFG) for support through GRK2376 (“Confinement-controlled Chemistry”, project number 331085229) and grant CL 489/2-2. We thank the European Research Council for ERC Consolidator Grant 683083 (RAMSES). We thank Dr. A. Baksi for the ESI-MS studies. Diffraction data of [G1@1]2+was collected at PETRA III, DESY (Hamburg, Germany), a member of the Helmholtz Association (HGF). We thank Eva Crosas for assistance at synchrotron beamline P11[thin space (1/6-em)]56 (I-20200144). The authors gratefully acknowledge the computing time provided on the Linux HPC cluster at TU Dortmund (LiDO3), partially funded in the course of the Large-Scale Equipment Initiative by the German Research Foundation (DFG) as project 271512359. We thank Dr. Christian Schürmann for help with the synthesis of ligand L.
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Project name : RAMSES
Grant ID : 683083
Funding program : ERC Consolidator Grant
Funding organization : European Research Council

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Title: Organic Chemistry Frontiers
  Abbreviation : Org. Chem. Front.
Source Genre: Journal
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Publ. Info: London : Royal Society of Chemistry
Pages: - Volume / Issue: 9 (20) Sequence Number: - Start / End Page: 5485 - 5493 Identifier: ISSN: 2052-4129
CoNE: https://pure.mpg.de/cone/journals/resource/2052-4129