Devautour-Vinot S., Sanil E.S., Geneste A. et al. · Chemistry - An Asian Journal · 2019 · 3561-3565
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.
The 1 M H2SO4-loaded MOF keeps its framework and acid loading after conductivity measurements, but measurements above 70% RH are limited by colour change and apparent progressive dissolution under harsher moisture conditions.
Caveat: The text also reports a high 95% RH conductivity; the caveat specifically concerns humidity-dependence collection above 70% RH.
4 · Results · Figure S3; Table S1 · Linked to 3 structured results
High H2SO4 loading strongly improves proton conductivity by providing extra protons and an extended H-bonded network involving SO3H groups, H2SO4 and water.
Caveat: 0.1 M loading gives only a small gain; strong enhancement appears only for the 1 M/1.8 H2SO4 sample.
4 · Results · Table 1 · Linked to 4 structured results
Pure-water washing removes confined H2SO4 and recovers the parent MIL-101(Cr)-NH-(CH2)3SO3H-like composition and conductivity.
Caveat: The reported washed/parent conductivity condition appears internally inconsistent with Table 1; values are preserved as printed.
5 · Results · Table S1; Figure 1a · Linked to 3 structured results
Activation energies below 0.40 eV indicate a Grotthuss-like proton transfer mechanism for the humid sulfonated and acid-loaded MIL-101(Cr) samples.
Caveat: Mechanistic assignment is based on activation-energy criterion and comparison with literature.
4 · Results · Figure 3; Table 1 · Linked to 4 structured results
Water molecules mediate long-range proton transport in MIL-101(Cr)-NH-(CH2)3SO3H; the dry material is insulating while humid samples show a dc conductivity plateau and ionic blocking behaviour.
Caveat: Transport mechanism is inferred from impedance profiles and humidity dependence rather than direct proton-motion spectroscopy.
3 · Results · Figure S1; Figure S2 · Linked to 3 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| H2SO4(0.1M)@MIL-101(Cr)-NH-(CH2)3SO3H | Cr3(H2O)3-O(O2-C6H3-NH-(CH2)3-SO3H-CO2)1.6(O2C-C6H3-NH2-CO2)1.4, 0.4 H2SO4Cr(III) MIL-101 inorganic nodes · propyl-sulfonic-acid-functionalised MIL-101(Cr) linkers | 3D · CompositeH2SO4 guest-loaded sulfonic MIL-101(Cr) with 0.4 H2SO4 molecules per MOF formula unit. | 4 · Results · Table S1 |
| H2SO4(1M)@MIL-101(Cr)-NH-(CH2)3SO3H | Cr3(H2O)3-O(O2-C6H3-NH-(CH2)3-SO3H-CO2)1.6(O2C-C6H3-NH2-CO2)1.4, 1.8 H2SO4Cr(III) MIL-101 inorganic nodes · propyl-sulfonic-acid-functionalised MIL-101(Cr) linkers | 3D · CompositeH2SO4 guest-loaded sulfonic MIL-101(Cr) with maintained XRPD framework and strongly reduced N2 uptake, indicating pore-confined acid molecules. | 4 · Results · Figure 1; Table S1 |
| MIL-101(Cr)-NH2 | MIL-101(Cr)-NH2Cr(III) MIL-101 inorganic nodes · aminoterephthalate linker after reduction of nitro groups | 3D · PristineAmino-functionalised MIL-101(Cr) intermediate identified by FTIR disappearance of NO2 band and appearance of NH deformation band. | 2 · Results · Figure 1d |
| MIL-101(Cr)-NH-(CH2)3SO3H | Cr3(H2O)3-O(O2-C6H3-NH-(CH2)3-SO3H-CO2)1.6(O2C-C6H3-NH2-CO2)1.4Cr(III) MIL-101 inorganic nodes · terephthalate linkers partially grafted with propyl-sulfonic acid groups; residual amine linkers | 3D · PristineSulfonic mesoporous MIL-101(Cr) derivative; framework integrity retained after PSM by XRPD and 54% propyl-sulfonic acid grafting by elemental analysis. | 2 · Results · Figure 1; Table S1 |
| MIL-101(Cr)-NO2 | MIL-101(Cr)-NO2Cr(III) MIL-101 inorganic nodes · 2-nitroterephthalate / nitro-terephthalic acid linker | 3D · PristineMesoporous cage-like MIL-101(Cr) framework; parent nitro-functionalised precursor whose XRPD matches MIL-101(Cr). | 2 · Results · Figure 1a |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| H2SO4(0.1M)@MIL-101(Cr)-NH-(CH2)3SO3H powderresearch_0711__mat__h2so4_0_1m_mil101_cr_nh_propyl_so3h | Powder · Target Sample · Guest Loaded | MIL-101(Cr)-NH-(CH2)3SO3H suspended in 0.1 M H2SO4 solution, stirred 30 min at room temperature, filtered and dried at 333 K for 2 h. | 3 · H2SO4 impregnation |
| H2SO4(1M)@MIL-101(Cr)-NH-(CH2)3SO3H after conductivity measurementsresearch_0711__mat__h2so4_1m_mil101_cr_nh_propyl_so3h | Powder · Target Sample · Guest Loaded | After 4 days under 90 C/95% RH conductivity experiment according to Table S1. | 6 · Elemental Analysis · Table S1 |
| H2SO4(1M)@MIL-101(Cr)-NH-(CH2)3SO3H powderresearch_0711__mat__h2so4_1m_mil101_cr_nh_propyl_so3h | Powder · Target Sample · Guest Loaded | MIL-101(Cr)-NH-(CH2)3SO3H suspended in 1 M H2SO4 solution, stirred 30 min at room temperature, filtered and dried at 333 K for 2 h. | 3 · H2SO4 impregnation |
| MIL-101(Cr)-NH2 powderresearch_0711__mat__mil101_cr_nh2 | Powder · Pristine Control · Pristine Framework | MIL-101(Cr)-NO2 reduced using SnCl2.2H2O/HCl in ethanol, filtered and washed with ethanol and water. | 2 · Post-synthetic reduction |
| MIL-101(Cr)-NO2 powderresearch_0711__mat__mil101_cr_no2 | Powder · Pristine Control · Pristine Framework | Hydrothermal product filtered, purified twice by hot ethanol treatment, filtered and dried at 373 K. | 2 · Synthesis of MIL-101(Cr)-NO2 |
| Anhydrous MIL-101(Cr)-NH-(CH2)3SO3H powderresearch_0711__mat__mil101_cr_nh_propyl_so3h | Powder · Target Sample · Pristine Framework | Heated in situ at 383 K for 12 h/overnight before impedance measurements to release adsorbed water. | 2 · Electrical measurements · Figure S1 |
| MIL-101(Cr)-NH-(CH2)3SO3H powderresearch_0711__mat__mil101_cr_nh_propyl_so3h | Powder · Target Sample · Pristine Framework | Post-synthetically modified with 1,3-propanesultone; solvent exchanged every 24 h for 2 days; dried at 348 K. | 2-3 · Post-synthetic modification |
| Washed H2SO4(1M)@MIL-101(Cr)-NH-(CH2)3SO3H powderresearch_0711__mat__mil101_cr_nh_propyl_so3h | Powder · Pristine Control · Pristine Framework | H2SO4(1M)-loaded solid washed several times in pure water until supernatant pH about 5. | 5 · Results · Table S1 |