Sadakiyo M., Kasai H., Kato K. et al. · Journal of the American Chemical Society · 2014 · 1702-1705
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.
This work reports the first MOF-based hydroxide-ion conductor / first MOF including freely exchangeable OH- ions.
Caveat: Priority claim is the authors' literature claim as of publication, not independently verified in this extraction.
1702 · Abstract · Linked to 2 structured results
The ZIF-8 framework structure is retained during strongly alkaline salt-inclusion treatment and ion exchange.
Caveat: XRPD and BET support framework retention; detailed Rietveld parameters are reported for NBu4-ZIF-8 but not for NBu4-ZIF-8-OH.
1703 · XRPD · Figure S5 · Linked to 3 structured results
NBu4-ZIF-8-OH contains freely exchangeable OH- ions in the MOF pores, estimated by CO2 chemisorption after ion exchange.
Caveat: Air exposure converts OH- to carbonate/bicarbonate species; authors took glovebox/N2 precautions for measurements.
1704 · Ion exchange · Figure 3 · Linked to 2 structured results
Tetrabutylammonium salts can be immobilised inside ZIF-8 pores through hydrophobic interactions between alkyl groups and the hydrophobic ZIF-8 framework.
Caveat: The interaction mechanism is inferred from retention after washing and structural/spectroscopic evidence rather than directly measured binding energies.
1702 · Abstract · Linked to 4 structured results
The ionic conductivity is mainly derived from anionic species rather than diffusion of aprotic NBu4+ ions.
Caveat: The detailed conducting mechanism is explicitly stated to remain under investigation.
1704 · Conductivity discussion · Linked to 3 structured results
Humidity increases NBu4-ZIF-8-OH conductivity, plausibly through hydrogen-bonding networks of OH- and water molecules in ZIF-8 pores.
Caveat: Authors state the conducting mechanism is still under investigation and note unfavorable features such as small ZIF-8 apertures.
1704 · Conductivity discussion · Figure 4 · Linked to 5 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| NBu4-ZIF-8Browse family: ZIF-8 / Zn(mIm)₂ | [Zn(mim)2]6(NBu4HCO3)0.70(H2O)nZn2+ imidazolate framework nodes · 2-methylimidazolate (mim) | 3D · CompositeZIF-8 framework retaining I-43m symmetry with NBu4HCO3 salt included in pores. | S1 · Synthesis of [Zn(mim)2]6(NBu4HCO3)0.70(H2O)n (NBu4-ZIF-8) |
| NBu4-ZIF-8-OHBrowse family: ZIF-8 / Zn(mIm)₂ | [Zn(mim)2]6(NBu4(HCO3)0.47(CO3)0.26)0.68(H2O)n for an air-exposed analysed sample; hydroxide-containing ion-exchanged form before air exposureZn2+ imidazolate framework nodes · 2-methylimidazolate (mim) | 3D · CompositeIon-exchanged NBu4-ZIF-8 derivative containing exchangeable OH- ions while preserving the porous ZIF-8 framework. | S2 · Ion-exchange reaction of NBu4-ZIF-8 |
| ZIF-8Browse family: ZIF-8 / Zn(mIm)₂ | Zn(mim)2; mim = 2-methylimidazolateZn2+ imidazolate framework nodes · 2-methylimidazolate (mim) | 3D · PristineZeolitic imidazolate framework with SOD cage/3D porous structure; space group I-43m for the reported powder refinement. | 1702 · Introduction · Figure 1 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| NBu4-ZIF-8-OH compacted pelletresearch_0464__mat__mat_nbu4_zif8_oh | Pellet · Target Sample · Guest Loaded | Powder compacted into a pellet with gold electrodes, transferred to a sealed cell inside the glovebox for humidity-controlled N2 impedance measurements.3 mm diameter pellet | S3 · Physical measurements |
| NBu4-ZIF-8-OH powderresearch_0464__mat__mat_nbu4_zif8_oh | Powder · Target Sample · Guest Loaded | Ion-exchanged NBu4-ZIF-8 powder prepared in 2 M NaOH under nitrogen/glovebox handling, washed, and vacuum dried. | S2 · Ion-exchange reaction of NBu4-ZIF-8 |
| NBu4-ZIF-8 compacted pelletresearch_0464__mat__mat_nbu4_zif8 | Pellet · Target Sample · Guest Loaded | Powder compacted into a pellet with gold electrodes for ac impedance.3 mm diameter pellet | S3 · Physical measurements |
| NBu4-ZIF-8 powderresearch_0464__mat__mat_nbu4_zif8 | Powder · Target Sample · Guest Loaded | ZIF-8 powder treated with 40 wt% aqueous NBu4OH at 70 C for 24 h, washed with water, and vacuum dried. | S1 · Synthesis of [Zn(mim)2]6(NBu4HCO3)0.70(H2O)n (NBu4-ZIF-8) |
| ZIF-8 compacted pelletresearch_0464__mat__mat_zif8 | Pellet · Pristine Control · Pristine Framework | Powder compacted into a pellet with two gold electrodes attached to both ends for ac impedance.3 mm diameter pellet | S3 · Physical measurements |
| ZIF-8 powderresearch_0464__mat__mat_zif8 | Powder · Pristine Control · Pristine Framework | White precipitate collected by centrifugation, washed with methanol, and vacuum dried at room temperature. | S1 · Synthesis of Zn(mim)2 (ZIF-8) |