Ma Y.-X., Gao B., Li Y. et al. · ACS Applied Materials and Interfaces · 2021 · 27066-27073
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.
MOF A is reported as a gas-driven conductive MOF whose conductivity is switched on by NO2 adsorption and off by NO2 evacuation.
Caveat: Two different conductivity pairs are reported in main text and SI Table S6; both are extracted.
main p.1 · Abstract · Linked to 5 structured results
MOF A-100 shows little resistance response to N2, O2, and CO2, supporting selectivity toward NO2-driven conductivity switching.
Caveat: Selectivity controls cover only N2, O2 and CO2 under reported conditions; no humidity or interferent panel beyond these gases.
main p.5 · Results and Discussion · Figure S25 · Linked to 2 structured results
PXRD, spectroscopy and TGA support retention of framework integrity after solvent removal/replacement and NO2 loading.
Caveat: A-100-NO2 lacks a separate CIF in the supplied documents; it is assigned by comparison to A-NO2 and supporting spectra.
main p.5 · Results and Discussion · Figures S9, S20-S22 · Linked to 5 structured results
Water removal in A-100 opens additional channel space and gives higher NO2 uptake than MOF A.
Caveat: The mechanistic explanation is based on the authors' interpretation of activation and uptake data.
main p.6 · Results and Discussion · Figure 7 · Linked to 3 structured results
NO2 forms hydrogen-bonding interactions between Co(II)/H3O+ and uncoordinated carboxylates, shortening electron transmission pathways and increasing conductivity.
Caveat: Mechanism is inferred from crystal structure and switching behaviour; electronic-structure calculations are not reported.
main p.4 · Results and Discussion · Figure 5 · Linked to 3 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| H8L ligand | tetrakis(5-hydroxyisophthalic acid)-resorcin[4]arene ligand; exact empirical formula not stated in text layernone · H8L precursor ligand for MOF A. | 0D · UnknownMolecular calix[4]resorcinarene ligand bearing four 5-hydroxyisophthalic acid groups. | SI p.2 · Synthesis of H8L ligand · Figure S1 |
| MOF A | ((H3O)4[Co2(L)(DMF)(H2O)4]2DMF.3H2O)Co(II) Co2O11 clusters; Co(1) and Co(2) BVS values 2.16 and 2.11. · Octadentate calix[4]resorcinarene ligand H8L / L8- with eight carboxylate groups. | 2D · PristineRed crystalline cobalt-calix[4]resorcinarene MOF with monoclinic P21/m two-dimensional sandwichlike thin layers; Co2O11 clusters interleaved by organic ligands. | main p.2 · Results and Discussion · Figures 2 and S10a |
| MOF A-100 | ((H3O)4[Co2(L)(DMF)(H2O)4]DMF)Co(II) Co2O11 clusters; cobalt cluster rotates counterclockwise by about 90 degrees relative to MOF A. · Calix[4]resorcinarene L8- ligand with four carboxylate units linking three Co2O11 clusters. | 2D · PristineWater-desorbed activated/dehydrated derivative of MOF A; purple monoclinic P21/m two-dimensional sandwichlike thin-layer framework. | main p.3 · Results and Discussion · Figures 2, S4 and S14 |
| MOF A-NO2 | ((H3O)4[Co2(L)(DMF)(NO2)12(H2O)4]DMF)Co(II) Co2O11 clusters with BVS values for Co(1) and Co(2) of 2.17 and 2.05. · Calix[4]resorcinarene L8- ligand; adsorbed NO2 bridges Co/carboxylate/H3O+ through hydrogen bonding. | 2D · PristineYellow NO2-loaded crystalline phase, monoclinic P21/m, sandwichlike two-dimensional layer; each NO2 molecule is confined within a cavity. | main p.3 · Results and Discussion · Figure 3 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| H8L ligand precursorresearch_0800__mat__mat_h8l_ligand | Powder · Unknown · Unknown | Isolated ligand product after multistep synthesis and acidification. | SI p.4 · Synthesis of H8L · Figure S1 |
| MOF A-100 heated/dehydrated crystalsresearch_0800__mat__mat_mof_a100 | Single Crystal · Target Sample · Pristine Framework | MOF A heated at 100 deg C for 5 min; water-desorbed, deep-purple phase. | main p.6 · Conversion Experiments · Figure S4 |
| MOF A-100-NO2 yellow NO2-loaded crystalresearch_0800__mat__mat_mof_ano2 | Single Crystal · Target Sample · Guest Loaded | MOF A-100 exposed to NO2 for 12 h, giving yellow A-100-NO2. | main p.6 · Conversion Experiments · Figure 1c |
| As-grown red MOF A single crystals/powderresearch_0800__mat__mat_mof_a | Single Crystal · Target Sample · Pristine Framework | As-grown red crystals washed with deionised water; PXRD-pure. | main p.2 and p.6 · Results and Discussion; Experimental Section · Figure 1a |
| MOF A-covered screen-printed gold electrode sheetresearch_0800__mat__mat_mof_a | Electrode · Target Sample · Pristine Framework | Fully activated ground MOF A dispersed in methanol, drop-cast on gold electrode, air dried 30 min, vacuum 30 min.screen-printed gold electrode sheet · about 110 um from Figure S17 enlarged SEM image | main p.6 · Preparation of the MOF A Film · Figures 4 and S17 |
| MOF A-NO2 yellow NO2-loaded crystalresearch_0800__mat__mat_mof_ano2 | Single Crystal · Target Sample · Guest Loaded | MOF A exposed to NO2; yellow NO2-loaded phase. | main p.3 · Results and Discussion · Figure 3 |
| NO2-exposed MOF A film on screen-printed gold electroderesearch_0800__mat__mat_mof_ano2 | Electrode · Target Sample · Guest Loaded | MOF A-covered electrode after NO2 flow during electrochemical test; film colour changed purple/yellow.screen-printed gold electrode sheet · about 110 um before exposure from Figure S17 | main p.4 · Results and Discussion · Figures 5 and S15 |