Goswami S., Hod I., Duan J.D. et al. · Journal of the American Chemical Society · 2019 · 17696-17702
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 measured Dhopping range spans from insufficient to more than sufficient for full participation of micron-thick MOF electrocatalyst films at a benchmark 10 mA cm-2 current density.
Caveat: This is an application projection for electrocatalyst-functionalised films, not a direct catalytic test in this paper.
4-5 · Results and Discussion; Conclusions · Linked to 3 structured results
Redox-hopping transport in NU-1000 is strongly anisotropic, with c-direction/channel transport exceeding a,b-plane transport by about 200- to 3500-fold depending on conditions and direction of the potential step.
Caveat: The exact ratio depends on solvent, electrolyte, forward versus reverse step and whether diffusion or EIS-derived conductivity is compared.
4-5 · Conclusions · Table 1; Table S2; Figure S4 · Linked to 4 structured results
Solvothermal films orient NU-1000 rods end-on/tilted so electrochemical charge moves mainly along the c-direction, whereas EPD films place rods mainly parallel to the electrode so charge moves mainly through the a,b plane.
Caveat: Solvothermal rods need not be strictly normal; some tilting is acknowledged.
3 · Results and Discussion · Figure 3 · Linked to 4 structured results
The transport anisotropy is attributed to direction-dependent linker-to-linker electronic coupling in the NU-1000 csq topology; t3 and t1 coupling greatly exceed t2 coupling.
Caveat: Computational values are attributed to prior Patwardan and Schatz work and are used here as mechanistic support.
2 and 5 · Results and Discussion; Conclusions · Figure 2 · Linked to 4 structured results
Tight ion pairing in low-dielectric dichloromethane likely couples electronic and ionic motion, reducing agreement with the electronic-coupling prediction; acetonitrile screens charges better and gives an approximately 3500-fold forward-step anisotropy.
Caveat: The authors state further study is needed to understand the microscopic basis of anion sensitivity.
9 · Comparison of theoretical and experimental Dhopping ratio · Table S2 · Linked to 3 structured results
NU-1000 becomes electrically conductive by reversible electrochemical oxidation of framework tetraphenylpyrene linkers, producing mixed-valent redox hopping rather than permanent through-node conductivity.
Caveat: Conductivity is assessed under electrochemical oxidation conditions.
1-2 · Abstract; 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 |
|---|---|---|---|
| NU-1000 | Zr6-based NU-1000 with TPPy(COO-)4 linkersRedox-inert hexazirconium(IV) oxy clusters; oxy-Zr6 cluster. · Carboxy-terminated tetraphenylpyrene linker, TPPy(COO-)4, from H4TBAPy. | 3D · Pristinecsq topology with one-dimensional hexagonal and trigonal mesopores/channels; rod-like hexagonal crystallites. | 1-2 · Abstract; Introduction · Figure 1 |
| NU-1000 linker-coupling model | NU-1000 structural/electronic-coupling modelHexazirconium cluster positions used to organise neighbouring carboxylates. · TPPy linker pairs with t1, t2 and t3 electronic-coupling geometries. | 3D · Model SystemModel system for direction-dependent linker-to-linker electronic coupling in NU-1000. | 2 · Results and Discussion · Figure 2 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Bulk NU-1000 powder used for EPD suspensionresearch_0219__mat__mat_nu1000 | Powder · Pristine Control · Pristine Framework | Previously reported bulk NU-1000 powder suspended in toluene before electrophoretic deposition.not_applicable | 4 · Electrophoretic deposition of NU-1000 |
| EPD NU-1000 thin film on ZnO-coated FTOresearch_0219__mat__mat_nu1000 | Electrode · Target Sample · Pristine Framework | Electrophoretic deposition of suspended NU-1000 hexagonal rods; rods mainly parallel to the electrode with a hexagonal face contacting the substrate.ZnO-coated fluorine-doped tin oxide (FTO) glass electrode · about 0.8 um film thickness and about 3.0 um crystallite length from Figure S3B annotation | 2-3 · Results and Discussion · Figures 3-4 |
| NU-1000 TPPy linker-pair coupling modelresearch_0219__mat__mat_nu1000_model | Model · Model System · Model | Computational model of linker-pair electronic coupling pathways t1, t2 and t3.not_applicable · not_applicable | 2 · Results and Discussion · Figure 2 |
| Solvothermal NU-1000 thin film on ZnO-coated FTOresearch_0219__mat__mat_nu1000 | Electrode · Target Sample · Pristine Framework | Interfacial solvothermal growth on ZnO-coated FTO; crystallites end-on/tilted with one rod end grafted to the electrode.ZnO-coated fluorine-doped tin oxide (FTO) glass electrode · about 2.7 um film/crystallite height from Figure S3A annotation | 2-3 · Results and Discussion · Figures 3-4 |