Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 117, Issue 2, Pages 877-882Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1918484117
Keywords
reproducibility; chemical synthesis; metal-organic frameworks
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Funding
- Center for Understanding and Control of Acid Gas-induced Evolution of Materials for Energy (UNCAGE-ME), an Energy Frontier Research Center - US Department of Energy, Office of Science, Basic Energy Sciences [DE-SC0012577]
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Finding examples where experimental measurements have been repeated is a powerful strategy for assessing reproducibility of scientific data. Here, we collect quantitative data to assess how often synthesis of a newly reported material is repeated in the scientific literature. We present a simple power-law model for the frequency of repeat syntheses and assess the validity of this model using a specific class of materials, metal-organic frameworks (MOFs). Our data suggest that a power law describes the frequency of repeat synthesis of many MOFs but that a small number of super-materials exist that have been replicated many times more than a power law would predict. Our results also hint that there are many repeat syntheses that have been performed but not reported in the literature, which suggests simple steps that could be taken to greatly increase the number of reports of replicate experiments in materials chemistry.
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