Sadakiyo M., Yamada T., Kitagawa H. · Journal of the American Chemical Society · 2009 · 9906-9907
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 paper claims compound 1 is the first MOF example to exhibit superprotonic conductivity of 10-2 S cm-1 at ambient temperature.
Caveat: Historical priority claim was not independently checked against external literature; extracted as the authors' claim.
2 · summary · Linked to 2 structured results
Adipamide is converted into adipic acid under the hydrothermal synthesis conditions, and adipic acid is present in compound 1.
Caveat: Supported by SCXRD interpretation and IR evidence; raw CIF was not supplied in the assignment.
1 · structure discussion · Figure S1 · Linked to 2 structured results
The extended hydrogen-bonded network among adipic acid, ammonium ions, water molecules and oxalate ions, together with additional protons, makes compound 1 a potentially high proton-conducting material.
Caveat: The structure-property relation is interpretive, but it is directly tied to reported short contacts and conductivity.
2 · structure discussion · Figure 1c · Linked to 4 structured results
The authors propose a Grotthuss-like contribution but argue that the high activation energy suggests additional vehicle/direct-diffusion processes involving water or ammonia molecules.
Caveat: Mechanistic assignment is inferred from activation energy and structural features rather than directly resolved proton dynamics.
2 · proton conductivity discussion · Figure 2 · Linked to 3 structured results
Water molecules play an important role in creating proton-conducting pathways, as partial dehydration to the dihydrate greatly lowers proton conductivity.
Caveat: The 70% RH dihydrate measurement temperature is not explicitly stated in the extracted text.
2 · proton conductivity discussion · Linked to 3 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Dihydrate form of compound 1 | (NH4)2(adp)[Zn2(ox)3].2H2O inferred from the reported trihydrate-to-dihydrate transformationZn2+ oxalate-bridged framework retained after partial dehydration according to TGA and X-ray structure analysis. · Oxalate and adipic acid with NH4+ counterions; lower water content than trihydrate. | 2D · PristineLower-hydration state of compound 1 formed below 85% RH; detailed structure values not reported in the supplied text. | 2 · proton conductivity discussion |
| (NH4)2(adp)[Zn2(ox)3].3H2O (compound 1) | (NH4)2(adp)[Zn2(ox)3].3H2O; adp = adipic acid; ox = oxalateZn2+ ions octahedrally coordinated by three oxalate ligands in oxalate-bridged [Zn2(ox)3]2- sheets. · Oxalate framework linkers plus adipic acid molecules in the interlayer/voids; NH4+ counterions and water molecules form the proton-conducting medium. | 2D · PristineLayered oxalate-bridged anionic honeycomb framework with interlayer adipic acid, NH4+ and water; SCXRD at 113 K. | 1 · main text · Figure 1 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Air-dried sample of compound 1research_0220__mat__mat_1_trihydrate | Powder · Target Sample · Pristine Framework | Air-dried product after hydrothermal synthesis, filtration and water washing. | S1 · Synthesis |
| Dihydrate form of compound 1 under 70% RHresearch_0220__mat__mat_1_dihydrate | Pellet · Target Sample · Pristine Framework | Lower-hydration state generated below 85% RH and measured at 70% RH. | 2 · proton conductivity discussion |
| Compacted pellet of powdered compound 1 under 98% RHresearch_0220__mat__mat_1_trihydrate | Pellet · Target Sample · Pristine Framework | Powder sample compacted into a pellet with two gold electrodes attached for AC impedance under humid conditions. | 2 · proton conductivity discussion · Figure 2 and Figure S2 |
| Single crystal of compound 1research_0220__mat__mat_1_trihydrate | Single Crystal · Target Sample · Pristine Framework | Crystal used for SCXRD at 113 K. | 1 · structure discussion · Figure 1 and reference 13 |