Pathak A., Chiou G.R., Gade N.R. et al. · ACS Applied Materials and Interfaces · 2017 · 21872-21878
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.
Compound 1 is a high-k Sm-based MOF candidate for gate dielectric applications because it combines kappa = 45.1 at 310 K/5 kHz with low dielectric loss, low AC conductivity and low leakage current.
Caveat: Device integration is not demonstrated; measurements are on pressed pellets rather than thin-film transistor gate stacks.
p006 / journal page 21877 · 4. Conclusion · Linked to 4 structured results
Low nitrogen uptake and small calculated extra-framework volume support low porosity and high density of the 3D Sm framework.
Caveat: No BET surface area is reported in the extracted text.
p003 / journal page 21874 · 3.2. Crystal Structure · Figure S8 · Linked to 3 structured results
The high dielectric response is attributed to polarised coordinated water molecules, high framework density and hydrogen bonding in the hexagonal channels.
Caveat: Hydrated/dehydrated comparison supports but does not independently isolate each proposed contribution.
p006 / journal page 21877 · 4. Conclusion · Linked to 4 structured results
AC conductivity is attributed to a hopping mechanism, with frequency exponent S values near 0.91-0.94 and conductivity increasing with frequency.
Caveat: The SI temperature header conflicts with the K-labelled temperature series in the main figures.
p005 / journal page 21876 · 3.5. Electrical Conductivity Measurements · Figure 4; Table S2 · Linked to 5 structured results
Impedance spectroscopy supports an intrinsic crystal-grain contribution to the dielectric response, modelled by two series equivalent circuits.
Caveat: Main-text resistance value is not identical to the R2 value listed in SI Table S3.
p005 / journal page 21876 · 3.6. Impedance Behavior · Figure 5 · Linked to 5 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Sm-MOF-1; compound 1; [Sm2(bhc)(H2O)6]n | [Sm2(bhc)(H2O)6]n; CIF empirical formula C6H6O9Sm; bhc = benzenehexacarboxylateSm(III) centres; nine-coordinate SmO9 tricapped trigonal prismatic environment; each SmO6 unit coordinates to four bhc6- ligands · benzenehexacarboxylate (bhc6-) from benzenehexacarboxylic acid / mellitic acid (H6bhc) | 3D · PristineOrthorhombic Pnmn 3D framework with (4,8)-connected nets and one-dimensional hexagonal channels containing coordinated water molecules. | p001 / journal page 21872 · Abstract |
| dehydrated compound 1' / dehydrated Sm-MOF-1 | Dehydrated form of compound 1 after annealing at 200 deg C; exact post-dehydration formula not explicitly assignedSm(III)-benzenehexacarboxylate framework after removal of coordinated water · benzenehexacarboxylate (bhc6-) | 3D · PristineDerived/dehydrated state of the same Sm-MOF-1 framework; used only as a dielectric comparison state. | p004 / journal page 21875 · 3.4. Dielectric Investigation · Figures S6 and S7 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| compound 1 silver-coated pelletresearch_0652__mat__mat_sm_mof_1 | Pellet · Target Sample · Pristine Framework | Crystals ground to powder, pressed into pellets, and coated on both sides with silver paste/electrodes for dielectric, AC conductivity, impedance and leakage measurements.silver paste or silver electrodes on both pellet faces · 0.04-0.08 cm; diameter about 0.6 cm | p002 / journal page 21873 · 2.1. Materials and Methods |
| as-synthesised compound 1 crystalsresearch_0652__mat__mat_sm_mof_1 | Single Crystal · Target Sample · Pristine Framework | Colourless hexagonal crystals isolated by hydrothermal synthesis, washed with water and dried at room temperature. | p002 / journal page 21873 · 2.2. Synthesis of [Sm2(bhc)(H2O)6]n (1) |
| dehydrated compound 1' pellet/sampleresearch_0652__mat__mat_sm_mof_1_dehydrated_state | Pellet · Target Sample · Pristine Framework | Compound 1 after annealing at 200 deg C to remove water; SI captions call this the dehydrated sample of Sm-MOF-1. | p006 / SI page S-6 · Figure S6 caption · Figure S6 |
| compound 1 powder / bulk sampleresearch_0652__mat__mat_sm_mof_1 | Powder · Target Sample · Pristine Framework | As-synthesised compound 1 in powder form for PXRD, TGA, FTIR, N2 adsorption and EDX/SEM characterisation. | p003 / journal page 21874 · 3.3. Powder X-ray Diffraction and Thermogravimetric Analysis · Figure 2 |