Primary studyCore evidenceTransport Physics

Controllable proton-conducting pathways: Via situating polyoxometalates in targeting pores of a metal-organic framework

Lai X., Liu Y., Yang G. et al. · Journal of Materials Chemistry A · 2017 · 9611-9617

5materials
17samples
17synthesis routes
23measurements
68results
5claims 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.

Phase AssignmentSupport assessment: High

HPW can be selectively located in larger cages, smaller cages, or both cage types of MIL-101 by impregnation, one-pot loading, and leaching strategies.

Caveat: Some pore-size distribution and FTIR support is in SI rendered-page figures, but numerical values and interpretations are reported in the main text.

main p.4 · Results and discussion · Fig. S5 · Linked to 5 structured results

Structure Property LinkSupport assessment: High

A linear HPW-mediated proton-conducting pathway in MIL-101 enables faster proton transport than the zigzag pathway.

Caveat: Primary conductivity values are exact main-text/table values; supporting matched-loading plot is in SI rendered-page Fig. S9.

main p.4 · Results and discussion · Linked to 4 structured results

Structure Property LinkSupport assessment: Medium

TETA provides the optimum polyamine length/loading balance for sample 3, whereas longer TEPA is hindered in the confined pores.

Caveat: The steric explanation is inferred by the authors from conductivity trends and molecular sizes.

main p.5 · Results and discussion · Table 2 · Linked to 5 structured results

Transport MechanismSupport assessment: Medium

Activation energies of the HPW/MIL-101 and polyamine@3 samples are interpreted as consistent with a Grotthuss proton-transport mechanism.

Caveat: Mechanism assignment is based on Arrhenius activation energies, not direct proton-motion observation.

main p.4 · Results and discussion · Fig. 4 · Linked to 4 structured results

Transport MechanismSupport assessment: High

The high conductivity of TETA@3 arises from synergy between polyamine hopping sites, HPW proton donors, and MIL-101 confinement.

Caveat: Mechanistic interpretation is author-proposed; direct microscopic dynamics data are not in the main article.

main p.5 · Results and discussion · Table 2 · Linked to 4 structured results

Material identities

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

MaterialCompositionStructure contextSource
HPW-loaded MIL-101(Cr)H3PW12O40 in MIL-101(Cr) poresMIL-101 chromium(III) clusters with Keggin-type HPW guests · Terephthalate3D · CompositeGuest-loaded MIL-101 with HPW selectively positioned in larger cages, smaller cages, or both cage types to form zigzag, linear, or multiple proton-conducting pathways.main p.3 · Results and discussion · Table 1
HPW/TETA blend (PT)H3PW12O40/triethylenetetramine precipitated blendNone; non-MOF HPW/TETA comparison · Triethylenetetramine0D · CompositeNon-framework acid-base blend used to show that the MIL-101 pore environment is required for high conductivity.main p.2 · Experimental
MIL-101(Cr)MIL-101 chromium terephthalate frameworkTrimeric chromium(III) clusters · Terephthalic acid / benzene-1,4-dicarboxylate3D · PristineMIL-101 framework with smaller Cage A and larger Cage B forming linear Pore A and zigzag Pore B tunnel profiles.main p.1 · Introduction · Fig. 1
Polyamine-modified HPW-loaded MIL-101(Cr)polyamine@HPW@MIL-101(Cr)MIL-101 chromium(III) clusters, HPW guests, and coordinated/protonated polyamines · Terephthalate plus ethylenediamine, diethylenetriamine, triethylenetetramine, or tetraethylenepentamine guests3D · CompositePost-modified HPW@MIL-101 sample 3 with flexible polyamines added as proton-hopping sites.main p.4 · Results and discussion · Fig. 3
TETA@MIL-101TETA-modified MIL-101(Cr)MIL-101 chromium(III) clusters with TETA at activated chromium sites · Terephthalate plus triethylenetetramine3D · CompositeTETA-modified MIL-101 without HPW proton donor, used as a comparison sample.main p.5 · Results and discussion · Table 2

Sample register

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

Show 17 sample records
SampleForm and roleProcessing and geometrySource
DETA@3research_0522__mat__polyamine_hpw_mil101Powder · Target Sample · Guest LoadedSample 3 post-modified with diethylenetriamine in anhydrous toluene under reflux.main p.5 · Results and discussion · Table 2
EN@3research_0522__mat__polyamine_hpw_mil101Powder · Target Sample · Guest LoadedSample 3 post-modified with ethylenediamine in anhydrous toluene under reflux.main p.5 · Results and discussion · Table 2
MIL-101research_0522__mat__mil101_crPowder · Pristine Control · Pristine FrameworkHydrothermally prepared powder; dried at room temperature and degassed under vacuum at 150 C for 12 h before further treatment.main p.1 · Introduction
PTresearch_0522__mat__hpw_teta_blendPowder · Model System · CompositeWhite HPW/TETA precipitate formed from aqueous HPW solution by TETA addition.main p.2 · Experimental
1research_0522__mat__hpw_mil101Powder · Target Sample · Guest LoadedDry MIL-101 impregnated with aqueous HPW; HPW selectively loaded into Cage B to form zigzag pathways.main p.3 · Results and discussion · Table 1
2research_0522__mat__hpw_mil101Powder · Target Sample · Guest LoadedPrepared by lixiviating/leaching HPW from Cage B of sample 3 until almost no HPW was detected in filtrate; HPW remains in Cage A.main p.3 · Results and discussion · Table 1
2 primeresearch_0522__mat__hpw_mil101Powder · Target Sample · Guest LoadedLower-loading linear-pathway analogue prepared from 3 prime by the same water leaching procedure.main p.4 · Results and discussion · Fig. S9
3research_0522__mat__hpw_mil101Powder · Target Sample · Guest LoadedOne-pot HPW incorporation during MIL-101 host formation; HPW loaded into both cage types.main p.3 · Results and discussion · Table 1
3 primeresearch_0522__mat__hpw_mil101Powder · Target Sample · Guest LoadedLower-HPW one-pot analogue used to prepare 2 prime.main p.2 · Experimental
TEPA@3research_0522__mat__polyamine_hpw_mil101Powder · Target Sample · Guest LoadedSample 3 post-modified with tetraethylenepentamine in anhydrous toluene under reflux.main p.5 · Results and discussion · Table 2
TETA@3research_0522__mat__polyamine_hpw_mil101Powder · Target Sample · Guest LoadedSample 3 post-modified with triethylenetetramine in anhydrous toluene under reflux.main p.5 · Results and discussion · Table 2
1.2TETA@3research_0522__mat__polyamine_hpw_mil101Powder · Target Sample · Guest LoadedSample 3 post-modified with 1.2 mmol TETA per 1.0 g sample under the TETA@3 conditions.main p.5 · Results and discussion · Table 2
1.7TETA@3research_0522__mat__polyamine_hpw_mil101Powder · Target Sample · Guest LoadedTETA-loading-series sample prepared with 1.7 mmol g^-1 TETA addition.main p.6 · Results and discussion · Fig. S17
2.7TETA@3research_0522__mat__polyamine_hpw_mil101Powder · Target Sample · Guest LoadedTETA-loading-series sample prepared with 2.7 mmol g^-1 TETA addition.main p.6 · Results and discussion · Fig. S17
3.2TETA@3research_0522__mat__polyamine_hpw_mil101Powder · Target Sample · Guest LoadedTETA-loading-series sample prepared with 3.2 mmol g^-1 TETA addition.main p.6 · Results and discussion · Fig. S17
4.2TETA@3research_0522__mat__polyamine_hpw_mil101Powder · Target Sample · Guest LoadedSample 3 post-modified with 4.2 mmol TETA per 1.0 g sample under the TETA@3 conditions.main p.6 · Results and discussion · Fig. S17
TETA@MIL-101research_0522__mat__teta_mil101Powder · Pristine Control · Guest LoadedActivated MIL-101 modified with TETA using the TETA@3 method but without HPW.main p.5 · Results and discussion · Table 2