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  Enhanced coherence by coupling spins through a delocalized π-system: Vanadyl porphyrin dimers

Pozo, I., Huang, Z., Lombardi, F., Alexandropoulos, D. I., Kong, F., Slota, M., et al. (2024). Enhanced coherence by coupling spins through a delocalized π-system: Vanadyl porphyrin dimers. Chem, 10(1), 299-316. doi:10.1016/j.chempr.2023.09.013.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000D-F926-0 Version Permalink: https://hdl.handle.net/21.11116/0000-000F-0EE0-5
Genre: Journal Article
Other : Enhanced coherence by coupling spins through a delocalized Pi-system: Vanadyl porphyrin dimers
Other : Enhanced coherence by coupling spins through a delocalized Pi system: Vanadyl porphyrin dimers

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 Creators:
Pozo, Iago, Author
Huang, Zhijie, Author
Lombardi, Federico, Author
Alexandropoulos, Dimitris I., Author
Kong, Fanmiao, Author
Slota, Michael, Author
Tkach, Igor1, Author           
Bennati, Marina1, Author           
Deng, Jie-Ren, Author
Stawski, Wojciech, Author
Horton, Peter N., Author
Coles, Simon J., Author
Myers, William K., Author
Bogani, Lapo, Author
Anderson, Harry L., Author
Affiliations:
1Research Group of Electron Paramagnetic Resonance, Max Planck Institute for Multidisciplinary Sciences, Max Planck Society, ou_3350281              

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 Abstract: Vanadium(IV) magnetic centers are prime candidates for molecular quantum units. One long-standing question is how to obtain a scaffold that connects multiple centers and allows two communication modalities: magnetic and electronic. We have synthesized and studied a selection of vanadyl porphyrin dimers as models of the most synthetically accessible linear porphyrin arrays. We show that a strongly π-conjugated backbone places the magnetic system in an intermediate regime dominated by exchange coupling (J) and protects the quantum coherence against electron pair flip-flop processes at low temperatures (<10 K). This result is a fundamental step toward the design of molecular materials for single-molecule devices controlled by microwaves with electrical readout.

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Language(s): eng - English
 Dates: 2023-10-112024-01-11
 Publication Status: Issued
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1016/j.chempr.2023.09.013
 Degree: -

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Project name : We thank the EPSRC (grant nos. EP/R029229/1 and EP/R042594/1), the Royal Society (URF and grant), the European Union (ERC-CoG-773048-MMGNR and ERC-ADG 885606 ARO-MAT), and the Margarita Salas Postdoctoral Fellowship (Next Generation EU, Gobierno de España – Ministerio de Universidades) for financial support.
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Funding organization : -
Project name : MMGNRs
Grant ID : 773048
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)
Project name : ARO-MAT
Grant ID : 885606
Funding program : Horizon 2020 (H2020)
Funding organization : European Commission (EC)

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Title: Chem
  Abbreviation : Chem
Source Genre: Journal
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Publ. Info: Cambridge, MA : Cell Press
Pages: - Volume / Issue: 10 (1) Sequence Number: - Start / End Page: 299 - 316 Identifier: ISSN: 2451-9294
CoNE: https://pure.mpg.de/cone/journals/resource/24519294