Evidence map›Paper›PMID 30846547›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2019

Voltage-induced long-range coherent electron transfer through organic molecules.

Karen Michaeli, David N Beratan, David H Waldeck, Ron Naaman

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.

0numbers the graph read from it
0cells of the map it votes in
11citing 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

11 citing papers in PubMed.

  1. Review
  2. Review
  3. Article
  4. Article
  5. Review
  6. What Can We Learn from Protein-Based Electron Transport Junctions?The journal of physical chemistry letters · 2021
    Article
  7. Article
  8. Article
  9. Atomic fluctuations in electronic materials revealed by dephasing.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  10. Article
  11. Why Are DNA and Protein Electron Transfer So Different?Annual review of physical chemistry · 2019
    Review
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

4 authors.

Karen MichaeliDepartment of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100, Israel; karen.michaeli@weizmann.ac.il.
David N BeratanDepartment of Chemistry, Duke University, Durham, NC 27708.
David H WaldeckChemistry Department, University of Pittsburgh, Pittsburgh PA 15260.
Ron NaamanDepartment of Chemical and Biological Physics, Weizmann Institute of Science, Rehovot 76100, Israel.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Biological structures rely on kinetically tuned charge transfer reactions for energy conversion, biocatalysis, and signaling as well as for oxidative damage repair. Unlike man-made electrical circuitry, which uses metals and semiconductors to direct current flow, charge transfer in living systems proceeds via biomolecules that are nominally insulating. Long-distance charge transport, which is observed routinely in nucleic acids, peptides, and proteins, is believed to arise from a sequence of thermally activated hopping steps. However, a growing number of experiments find limited temperature dependence for electron transfer over tens of nanometers. To account for these observations, we propose a temperature-independent mechanism based on the electric potential difference that builds up along the molecule as a precursor of electron transfer. Specifically, the voltage changes the nature of the electronic states away from being sharply localized so that efficient resonant tunneling across long distances becomes possible without thermal assistance. This mechanism is general and is expected to be operative in molecules where the electronic states densely fill a wide energy window (on the scale of electronvolts) above or below the gap between the highest-occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO). We show that this effect can explain the temperature-independent charge transport through DNA and the strongly voltage-dependent currents that are measured through organic semiconductors and peptides.

Indexed as

Electron TransportDNAElectric ConductivityEnergy MetabolismKineticsModels, TheoreticalNucleic AcidsPeptidesProteinsDNANucleic AcidsPeptidesProteinselectric field delocalizationelectron transferorganic molecules

Identifiers

PMID30846547
PMCPMC6442562

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Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.