Liu R., Liu Y., Yu S. et al. · ACS Applied Materials and Interfaces · 2019 · 1713-1722
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.
At 98% RH and room temperature, MOF 1 gives the highest NH3 response and the lowest detection limit among its tested humidity conditions.
Caveat: The best condition is high humidity (98% RH), which may limit dry-environment deployment.
1719 · Section 3.4 · Linked to 4 structured results
MOF 1 shows much larger responses to NH3 and amines than to N2, H2, O2, CO, CO2, benzene, MeOH, n-hexane and toluene under 68-98% RH.
Caveat: Selectivity was tested at 30 ppm and room temperature in the reported chamber.
1719 · Section 3.4 · Figure 6; Tables S6-S11 · Linked to 4 structured results
MOF 1 retains crystallinity after water, pH and sensing/cycling challenges and shows reusable sensor behaviour.
Caveat: PXRD provides phase retention evidence but not quantitative defect or long-term transport degradation metrics.
1719 · Section 3.4 · Figures S17-S21 · Linked to 4 structured results
The authors note that sodium-ion thermal motion may influence the measured conductivity at higher temperature.
Caveat: The magnitude of sodium-ion contribution was not quantified.
1716 · Section 3.3 · Linked to 1 structured result
Uncoordinated carboxylate oxygen atoms and free sodium ions in the 1D channels provide proton-transfer pathways that enhance proton conduction and sensing.
Caveat: Mechanistic interpretation is based on structural features and conductivity trends rather than direct proton-transport imaging.
1715 · Section 3.1 · Linked to 3 structured results
MOF 1 proton transfer is water-mediated; high humidity increases conductivity by enabling hydrogen-bond networks in the channels.
Caveat: Sodium-ion motion may influence conductivity at increased temperature according to the authors.
1715-1716 · Section 3.3 · Linked to 4 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| MOF 1, {Na[Cd(MIDC)]}n | {Na[Cd(MIDC)]}n; crystallographic formula C6H3CdN2NaO4Cd(II) nodes with charge-balancing Na+ ions in channels · MIDC3- from 2-methyl-1H-imidazole-4,5-dicarboxylic acid (H3MIDC) | 3D · PristineTetragonal P42/nmc 3D ionic framework with 1D channels; Cd in distorted CdN2O4 octahedral environment; uncoordinated carboxylate oxygens and sodium ions occupy part of the channels. | 1713-1715 · Abstract and Section 3.1 · Figure 1; Table S1 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| MOF 1 activated sample for adsorption isothermsresearch_0817__mat__mat_mof1_na_cd_midc | Powder · Target Sample · Pristine Framework | Soaked in ethanol for 3 days with solvent exchanged three times per day, filtered, and vacuum dried at 70 C for 8 h. | 1714 · Section 2.4 |
| MOF 1 as-synthesised colourless cubic crystalsresearch_0817__mat__mat_mof1_na_cd_midc | Single Crystal · Target Sample · Pristine Framework | Solvothermally synthesised and rinsed with deionised water; used for single-crystal XRD, PXRD, TG and bulk characterisation. | 1714 · Section 2.2 |
| MOF 1 cylindrical pellet for proton conductivityresearch_0817__mat__mat_mof1_na_cd_midc | Pellet · Target Sample · Pristine Framework | About 30 mg sample pressed under 2.5 MPa for 3 min and equilibrated at target RH for 18 h.Pt electrodes · diameter and thickness determined using a Vernier caliper; exact dimensions not reported | 1714 · Section 2.5 |
| MOF 1 pellet/tablet impedance gas sensorresearch_0817__mat__mat_mof1_na_cd_midc | Pellet · Target Sample · Pristine Framework | Tablet/pellet equilibrated at fixed RH for 18 h before exposure to diluted ammonia or amine gases.Pt mesh/Pt electrodes in gas-sensing chamber | 1718 · Section 3.4 |
| MOF 1 water- and pH-treated stability samplesresearch_0817__mat__mat_mof1_na_cd_midc | Powder · Target Sample · Pristine Framework | Crystalline solids soaked in water for 1 month, refluxed in water for 24 h, or soaked in pH 1-11 solutions for 24 h; isolated/dried for PXRD. | 1714-1715 · Sections 2.4 and 3.2 · Figure 2 |