Evidence map›Paper›PMID 37087505›Full record

ArticleCommunications chemistry2023

Search for a Grotthuss mechanism through the observation of proton transfer.

Ivan Popov, Zhenghao Zhu, Amanda R Young-Gonzales, Robert L Sacci, Eugene Mamontov, Catalin Gainaru, Stephen J Paddison, Alexei P Sokolov

Open access · goldAbstract read
In one paragraph

Article in Communications chemistry, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 1 pooled it
28.8field-weighted citation impact, top 1% of its field
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

29 citing papers in PubMed, 1 synthesis or guideline pooled it, 142 citations in OpenAlex.

  1. Pooled it
  2. TiNanomaterials (Basel, Switzerland) · 2026
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  6. Trends for Proton Transport Activity and Stability in Turnbull's Blue Analogues: Theory and Experiments.Chemistry of materials : a publication of the American Chemical Society · 2026
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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

8 authors at 3 institutions in 1 country.

Ivan PopovChemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
Zhenghao ZhuDepartment of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, USA.ORCID http://orcid.org/0000-0001-9748-3894
Amanda R Young-GonzalesDepartment of Chemistry, University of Tennessee, Knoxville, TN, USA.
Robert L SacciChemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.ORCID http://orcid.org/0000-0002-0073-5221
Eugene MamontovNeutron Scattering Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.ORCID http://orcid.org/0000-0002-5684-2675
Catalin GainaruChemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA.
Stephen J PaddisonDepartment of Chemical & Biomolecular Engineering, University of Tennessee, Knoxville, TN, USA. spaddison@utk.edu.ORCID http://orcid.org/0000-0003-1064-8233
Alexei P SokolovChemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN, USA. sokolov@utk.edu.ORCID http://orcid.org/0000-0002-8187-9445
Oak Ridge National Laboratory · USUniversity of Tennessee at Knoxville · USKnoxville College · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The transport of protons is critical in a variety of bio- and electro-chemical processes and technologies. The Grotthuss mechanism is considered to be the most efficient proton transport mechanism, generally implying a transfer of protons between 'chains' of host molecules via elementary reactions within the hydrogen bonds. Although Grotthuss proposed this concept more than 200 years ago, only indirect experimental evidence of the mechanism has been observed. Here we report the first experimental observation of proton transfer between the molecules in pure and 85% aqueous phosphoric acid. Employing dielectric spectroscopy, quasielastic neutron, and light scattering, and ab initio molecular dynamic simulations we determined that protons move by surprisingly short jumps of only ~0.5-0.7 Å, much smaller than the typical ion jump length in ionic liquids. Our analysis confirms the existence of correlations in these proton jumps. However, these correlations actually reduce the conductivity, in contrast to a desirable enhancement, as is usually assumed by a Grotthuss mechanism. Furthermore, our analysis suggests that the expected Grotthuss-like enhancement of conductivity cannot be realized in bulk liquids where ionic correlations always decrease conductivity.

Identifiers

PMID37087505
PMCPMC10122652
OpenAlexW4366769140

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

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.