Primary studyCore evidenceTransport Physics

Machine Learning-Based Prediction of Proton Conductivity in Metal-Organic Frameworks

Han S., Lee B.G., Lim D.-W. et al. · Chemistry of Materials · 2024 · 11280-11287

4materials
4samples
0synthesis routes
8measurements
35results
6claims and caveats

Evidence map

Open a family to keep every result attached to its sample, method and conditions.

Author interpretations and caveats

Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.

CaveatSupport assessment: High

No first-hand MOF synthesis route is reported in the supplied main text or SI; the work curates literature structures/data and performs ML modelling.

Caveat: Original synthesis recipes may exist in the 172 source papers but are not extracted here because they are not first-hand rows in this paper and the raw source set is not supplied.

11281 · Data Extraction and Curation · Figure 1 · Linked to 2 structured results

CaveatSupport assessment: High

Randomly splitting entries can give artificially high performance because the same MOF may appear in training and validation/test under different conditions.

Caveat: Main reported evaluation therefore splits by MOF structure.

11283 · Performance Comparison · Figure S3 · Linked to 3 structured results

CaveatSupport assessment: Medium

The model could potentially improve if quantitative guest or water adsorption/coordinated-water information were available.

Caveat: The authors note that solvent removal from experimental structures can obscure coordinated water.

11284 · Performance Comparison · Figure 5g,h · Linked to 2 structured results

Structure Property LinkSupport assessment: High

The transformer-based transfer-learning freeze model gave the best proton-conductivity prediction performance among the evaluated models, with test MAE 0.91.

Caveat: Prediction error is still approximately one order of magnitude in log conductivity.

11283 · Performance Comparison · Table 1 · Linked to 5 structured results

Structure Property LinkSupport assessment: Medium

Guest descriptors and differences in linker connections were identified as important factors for predicting proton conductivity.

Caveat: Importance rankings varied across cross-validation folds and raw feature-importance values are mainly shown graphically.

11284 · Performance Comparison · Figure S6 · Linked to 3 structured results

Transport MechanismSupport assessment: Medium

Temperature and relative humidity are fundamental predictors of proton conductivity, while guest and MOF information improve accuracy.

Caveat: The claim is model-derived and based on a literature data set with heterogeneous experimental protocols.

11284 · Performance Comparison · Figure 5 · Linked to 5 structured results

Material identities

Names and aliases are kept exactly within the paper’s own identity model.

MaterialCompositionStructure contextSource
IKOTUZNot specifiedunknown · Model SystemExample MOF/CSD identifier shown in the database workflow and attention-score analysis.S-12 · Supporting Information · Figure S7
KUXRECNot specifiedunknown · Model SystemExample MOF/CSD identifier included in SI Table S1 and used in attention-score analysis with imidazole guest molecules.S-2 · Supporting Information · Table S1
proton-conductive MOF databaseNot specifiedvarious metals across literature MOFs · various organic linkers across literature MOFsunknown · Model SystemAggregate set of 248 MOF structural files curated from CSD/reference-code CIFs and literature proton-conductivity reports.11282 · Data Extraction and Curation · Figure 2
SI Table S1 named CIF subsetNot specifiedvarious · variousunknown · Model SystemNamed CIF/reference-code subset listed as included in the Supporting Information or previous research.S-2 · Supporting Information · Table S1

Sample register

Sample form, processing state and composition status define the context for measurements.

Show 4 sample records
SampleForm and roleProcessing and geometrySource
IKOTUZ without guest moleculesresearch_0725__mat__mat_ikotuzModel · Model System · Pristine FrameworkAttention-score example for transfer-learning analysis without guest molecules.S-12 · Supporting Information · Figure S7
KUXREC with imidazole guestresearch_0725__mat__mat_kuxrecModel · Model System · Guest LoadedAttention-score example for transfer-learning analysis with imidazole guest molecules.S-12 · Supporting Information · Figure S7
literature proton-conductivity entriesresearch_0725__mat__mat_proton_mof_databaseUnknown · Paper Level Unspecified · UnknownConductivity values digitised or extracted from prior experimental MOF papers under varied temperature, relative humidity, and guest conditions.11281 · Data Extraction and Curation · Figure 1
curated 248-CIF proton-conductive MOF model/data setresearch_0725__mat__mat_proton_mof_databaseModel · Model System · ModelLiterature proton-conductivity data linked to curated CIF structures, temperatures, RH values, and guest molecules.11281 · Results and Discussion · Figure 1