Evidence map›Paper›PMID 38332330›Full record

ArticleNature chemistry2024

Bistability between π-diradical open-shell and closed-shell states in indeno[1,2-a]fluorene.

Shantanu Mishra, Manuel Vilas-Varela, Leonard-Alexander Lieske, Ricardo Ortiz, Shadi Fatayer, Igor Rončević, Florian Albrecht, Thomas Frederiksen, Diego Peña, Leo Gross

Abstract read
In one paragraph

Article in Nature chemistry, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

18 citing papers in PubMed.

  1. DesignerNational science review · 2026
    Review
  2. Article
  3. Bistable carbon nanobracelets.Journal of molecular modeling · 2026
    Article
  4. Article
  5. Article
  6. Skeletal Editing by Tip-Induced Chemistry.Journal of the American Chemical Society · 2025
    Article
  7. Article
  8. Article
  9. Review
  10. Review
  11. Article
  12. Article
  13. Article
  14. Article
  15. Redox-Switchable Aromaticity in a Helically Extended Indeno[2,1-Journal of the American Chemical Society · 2024
    Article
  16. Article
  17. Synthesis of Tridecacene by Multistep Single-Molecule Manipulation.Journal of the American Chemical Society · 2024
    Article
  18. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

10 authors.

Shantanu MishraIBM Research Europe - Zurich, Rüschlikon, Switzerland. SHM@zurich.ibm.com.ORCID http://orcid.org/0000-0002-2900-4203
Manuel Vilas-VarelaCenter for Research in Biological Chemistry and Molecular Materials (CiQUS) and Department of Organic Chemistry, University of Santiago de Compostela, Santiago de Compostela, Spain.ORCID http://orcid.org/0000-0002-6768-5441
Leonard-Alexander LieskeIBM Research Europe - Zurich, Rüschlikon, Switzerland.
Ricardo OrtizDonostia International Physics Center (DIPC), Donostia-San Sebastián, Spain.
Shadi FatayerApplied Physics Program, Physical Science and Engineering Division (PSE), King Abdullah University of Science and Technology (KAUST), Thuwal, Kingdom of Saudi Arabia.
Igor RončevićDepartment of Chemistry, University of Oxford, Oxford, UK.ORCID http://orcid.org/0000-0003-2175-8059
Florian AlbrechtIBM Research Europe - Zurich, Rüschlikon, Switzerland.ORCID http://orcid.org/0000-0002-7418-9155
Thomas FrederiksenDonostia International Physics Center (DIPC), Donostia-San Sebastián, Spain.ORCID http://orcid.org/0000-0001-7523-7641
Diego PeñaCenter for Research in Biological Chemistry and Molecular Materials (CiQUS) and Department of Organic Chemistry, University of Santiago de Compostela, Santiago de Compostela, Spain. diego.pena@usc.es.ORCID http://orcid.org/0000-0003-3814-589X
Leo GrossIBM Research Europe - Zurich, Rüschlikon, Switzerland. LGR@zurich.ibm.com.ORCID http://orcid.org/0000-0002-5337-4159

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Indenofluorenes are non-benzenoid conjugated hydrocarbons that have received great interest owing to their unusual electronic structure and potential applications in nonlinear optics and photovoltaics. Here we report the generation of unsubstituted indeno[1,2-a]fluorene on various surfaces by the cleavage of two C-H bonds in 7,12-dihydroindeno[1,2-a]fluorene through voltage pulses applied by the tip of a combined scanning tunnelling microscope and atomic force microscope. On bilayer NaCl on Au(111), indeno[1,2-a]fluorene is in the neutral charge state, but it exhibits charge bistability between neutral and anionic states on the lower-workfunction surfaces of bilayer NaCl on Ag(111) and Cu(111). In the neutral state, indeno[1,2-a]fluorene exhibits one of two ground states: an open-shell π-diradical state, predicted to be a triplet by density functional and multireference many-body perturbation theory calculations, or a closed-shell state with a para-quinodimethane moiety in the as-indacene core. We observe switching between open- and closed-shell states of a single molecule by changing its adsorption site on NaCl.

Identifiers

PMID38332330
PMCPMC11087267

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