Liu R.-L., Qu W.-T., Dou B.-H. et al. · Chemistry - An Asian Journal · 2020 · 182-190
Open a family to keep every result attached to its sample, method and conditions.
Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.
Pristine ZZU-1 and ZZU-2 pellets act as impedance sensors for formic acid vapour generated from aqueous formic acid at 25 deg C, with selectivity over common VOC interferents.
Caveat: Several response magnitudes are figure-read estimates; detection limits and linear ranges are text-reported.
6-7 · Results and Discussion · Figures 8-9 · Linked to 4 structured results
ZZU-1 and ZZU-2 retain framework integrity after water, boiling-water, acid/base, impedance, humidity-cycling and formic-acid sensing tests.
Caveat: Most post-test structural evidence is qualitative PXRD/SEM matching rather than refined post-test structures.
2-6 · Results and Discussion · Figures 2, 3, S15, S18-S22 · Linked to 4 structured results
Water molecules and uncoordinated imidazole N atoms form hydrogen-bonding networks that promote water-assisted proton conduction in ZZU-1 and ZZU-2.
Caveat: Detailed crystallographic data for ZZU-2 are referenced from prior work rather than tabulated here.
4 · Results and Discussion · Figures 4-5 · Linked to 5 structured results
At 98% RH, ZZU-1 is near a mixed mechanism at 25-70 deg C and vehicle-like above 70 deg C, while ZZU-2 changes from Grotthuss at 25-70 deg C to vehicle at 80-100 deg C.
Caveat: Mechanism assignment is inferred by the authors from activation-energy thresholds.
5 · Results and Discussion · Figure 7 · Linked to 4 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| ZZU-1 | {(Tb(mu3-HPhIDC)(mu2-C2O4)0.5(H2O))·2H2O}nTb(III) centres connected by HPhIDC2- and oxalate ligands · H3PhIDC-derived 2-phenyl-1H-imidazole-4,5-dicarboxylate (HPhIDC2-) and oxalate | 3D · Pristine3D isostructural lanthanide MOF; adjacent Tb(III) atoms form 1D chains, chains bridge into 2D sheets, and oxalate anions hold sheets into a 3D framework with water and uncoordinated imidazole N sites. | 1-2 · Abstract; Results and Discussion · Figure 1 |
| ZZU-2 | {(Eu(mu3-HPhIDC)(mu2-C2O4)0.5(H2O))·2H2O}nEu(III) centres in the isostructural lanthanide MOF framework · H3PhIDC-derived 2-phenyl-1H-imidazole-4,5-dicarboxylate (HPhIDC2-) and oxalate | 3D · Pristine3D isostructural lanthanide MOF analogous to ZZU-1, with coordinated/uncoordinated water molecules and uncoordinated imidazole N atoms. | 1-2 · Abstract; Results and Discussion · Figure 2 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| activated ZZU-1 crystalsresearch_0858__mat__mat_zzu1 | Powder · Target Sample · Pristine Framework | Dehydrated/activated by evacuation in a vacuum oven at 65 deg C for 18 h before N2 and water vapour adsorption tests. | 8 · Experimental Section - Stability experiment and activation |
| ZZU-1 crystalline sampleresearch_0858__mat__mat_zzu1 | Single Crystal · Target Sample · Pristine Framework | As-synthesised crystals used for PXRD, SEM, water/acid/base stability and related framework characterisation. | 8 · Experimental Section - Reagents and Apparatus |
| pelletised ZZU-1research_0858__mat__mat_zzu1 | Pellet · Target Sample · Pristine Framework | Ground crystals compressed into pellets at 3 MPa for 4 min for AC impedance/proton conductivity measurements.not reported | 8 · Experimental Section - Proton conductivity measurements |
| ZZU-1 tablet impedance sensorresearch_0858__mat__mat_zzu1 | Pellet · Target Sample · Pristine Framework | Tablet sandwiched between two platinum sheets and exposed to analyte vapours in a home-made sensing device.platinum sheets · not reported | 8 · Experimental Section - Gas-Sensing Characterization |
| activated ZZU-2 crystalsresearch_0858__mat__mat_zzu2 | Powder · Target Sample · Pristine Framework | Dehydrated/activated by evacuation in a vacuum oven at 65 deg C for 18 h before N2 and water vapour adsorption tests. | 8 · Experimental Section - Stability experiment and activation |
| ZZU-2 crystalline sampleresearch_0858__mat__mat_zzu2 | Single Crystal · Target Sample · Pristine Framework | As-synthesised crystals used for PXRD, SEM, water/acid/base stability and related framework characterisation. | 8 · Experimental Section - Reagents and Apparatus |
| pelletised ZZU-2research_0858__mat__mat_zzu2 | Pellet · Target Sample · Pristine Framework | Ground crystals compressed into pellets at 3 MPa for 4 min for AC impedance/proton conductivity measurements.not reported | 8 · Experimental Section - Proton conductivity measurements |
| ZZU-2 tablet impedance sensorresearch_0858__mat__mat_zzu2 | Pellet · Target Sample · Pristine Framework | Tablet sandwiched between two platinum sheets and exposed to analyte vapours in a home-made sensing device.platinum sheets · not reported | 8 · Experimental Section - Gas-Sensing Characterization |