Wang Y., Miao X., Kempler P.A. et al. · Journal of the American Chemical Society · 2025 · 48158-48165
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.
Mn2(TTFTB), Co2(TTFTB), and Cd2(TTFTB) show strong chemiresistive moisture response, with dynamic humid/dry N2 on/off ratios above 10^3.
Caveat: Dynamic Figure 2 current values are plotted rather than tabulated in the accessible text.
48159 · Potential for Chemiresistive Moisture Sensing · Figure 2 · Linked to 3 structured results
Comparable shortest S...S distances and similar CV/redox behaviour indicate that Zn2(TTFTB)'s distinct conductivity is not explained by intrinsic charge mobility, charge density, or redox capacitance.
Caveat: Mobility is inferred structurally; Hall/FET mobility was not directly measured.
48162 · Why Is Zn2(TTFTB) Distinct? · Figure 6 · Linked to 7 structured results
Zn2(TTFTB)'s relatively low humid-atmosphere conductivity and small on/off ratio arise from high Zn2+ Coulombic potential, which strengthens metal-anion/water interactions and reduces effective water screening.
Caveat: The Zn explanation is a structure/property interpretation based on Coulombic-potential descriptors, water retention and activation-energy trends, not a directly imaged screening event.
48163 · Why Is Zn2(TTFTB) Distinct? · Table S9 · Linked to 5 structured results
Oxygen is not responsible for the atmospheric conductivity modulation; Zn2(TTFTB) EPR spectra and radical concentrations are nearly unchanged by evacuation or aerobic/air synthesis differences.
Caveat: Paramagnetic Mn and Co obscure precise radical concentration by CW-EPR.
48160 · Mechanism of Chemiresistive Moisture Sensing · Figure 3d; Figure S10; Figure S24 · Linked to 4 structured results
Linear I-V curves, semicircular Nyquist plots, Pt-electrode devices, and DC polarisation experiments indicate predominantly pure electrical conduction with negligible proton conduction or PCET.
Caveat: DC polarisation table exact values at 0.1 V were not readable from the local SI text.
48161 · Mechanism of Chemiresistive Moisture Sensing · Figures 4, S15-S21 · Linked to 4 structured results
DC conductivity increases with increasing temperature from 293 to 353 K, supporting semiconducting behaviour for the M2(TTFTB) analogues.
Caveat: Temperature-dependent conductivity curves are in SI figures beyond the supplied image cap; only captions/text and Figure 6d are available.
48162 · Why Is Zn2(TTFTB) Distinct? · Figures S26-S29 · Linked to 4 structured results
Water adsorption enhances apparent conductivity by screening hole-anion Coulombic charge-trapping interactions rather than by changing hole density, intrinsic mobility, proton conduction, or PCET.
Caveat: Some exact conductivity and DRT table values are not accessible in the supplied text/images.
48162 · Mechanism of Chemiresistive Moisture Sensing · 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 |
|---|---|---|---|
| Cd2(TTFTB)Browse family: Cd₂(TTFTB) | Cd2(TTFTB)Cd2+ metal-carboxylate chains; some metal ions coordinated by water · TTFTB4- = tetrathiafulvalene tetrabenzoate | 3D · PristineIsostructural microporous conductive MOF with nanoscale pores and pi-stacked TTF columns along the crystallographic c axis. | 48160 · Results and Discussion · Figure 3 |
| Co2(TTFTB)Browse family: Co₂(TTFTB) | Co2(TTFTB)Co2+ metal-carboxylate chains; some metal ions coordinated by water · TTFTB4- = tetrathiafulvalene tetrabenzoate | 3D · PristineIsostructural microporous conductive MOF with nanoscale pores and pi-stacked TTF columns along the crystallographic c axis. | 11 · Figure S1 caption · Figure S1 |
| Mn2(TTFTB)Browse family: Mn₂(TTFTB) | Mn2(TTFTB)Mn2+ metal-carboxylate chains; some metal ions coordinated by water · TTFTB4- = tetrathiafulvalene tetrabenzoate | 3D · PristineIsostructural microporous conductive MOF with nanoscale pores and pi-stacked TTF columns along the crystallographic c axis. | 48159 · Introduction · Figure 1 |
| Zn2(TTFTB)Browse family: Zn₂(TTFTB) | Zn2(TTFTB)Zn2+ metal-carboxylate chains; some metal ions coordinated by water · TTFTB4- = tetrathiafulvalene tetrabenzoate | 3D · PristineIsostructural microporous conductive MOF with nanoscale pores and pi-stacked TTF columns along the crystallographic c axis. | 48162 · Why Is Zn2(TTFTB) Distinct? |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Pressed pellet of Cd2(TTFTB)research_0190__mat__mat_cd2_ttftb | Pellet · Target Sample · Pristine Framework | As-synthesised materials ground and pressed into pellets; applies to Mn, Co, Cd, Zn analogues.glass slide with Ti/Au electrodes, gold wires and carbon paste · 6 mm inner-diameter pressing die; pressure approximately 20 MPa | 5 · Fabrication of pressed pellets devices · Figure S7 |
| Cd2(TTFTB) single-crystal two-contact device with Au wires/carbon pasteresearch_0190__mat__mat_cd2_ttftb | Single Crystal · Target Sample · Pristine Framework | Rod-like single crystal contacted along crystallographic c axis.glass slide with Ti/Au electrodes; gold wires and carbon paste contacts | 48159 · Results and Discussion · Figure 2 |
| Cd2(TTFTB) powder-coated glassy carbon electrode for CVresearch_0190__mat__mat_cd2_ttftb | Electrode · Target Sample · Pristine Framework | Ground MOF powders suspended in ethanol and drop-cast before CV.glassy carbon disk electrode · 10 uL suspension drop-cast on 0.07 cm2 electrode | 9-10 · Cyclic voltammetry (CV) · Figure 6c |
| Single crystal of Cd2(TTFTB) for quantitative CW-EPRresearch_0190__mat__mat_cd2_ttftb | Single Crystal · Target Sample · Pristine Framework | Rod-like single crystal placed on solidified PPC; crystallographic c axis parallel to static magnetic field.PPC support in quartz tube | 7-8 · Single-crystal CW EPR characterization · Figures S23-S24 |
| Pressed pellet of Co2(TTFTB)research_0190__mat__mat_co2_ttftb | Pellet · Target Sample · Pristine Framework | As-synthesised materials ground and pressed into pellets; applies to Mn, Co, Cd, Zn analogues.glass slide with Ti/Au electrodes, gold wires and carbon paste · 6 mm inner-diameter pressing die; pressure approximately 20 MPa | 5 · Fabrication of pressed pellets devices · Figure S7 |
| Co2(TTFTB) single-crystal two-contact device with Au wires/carbon pasteresearch_0190__mat__mat_co2_ttftb | Single Crystal · Target Sample · Pristine Framework | Rod-like single crystal contacted along crystallographic c axis.glass slide with Ti/Au electrodes; gold wires and carbon paste contacts | 48159 · Results and Discussion |
| Ground M2(TTFTB) powders for in situ PXRDresearch_0190__mat__mat_mn2_ttftb | Powder · Target Sample · Pristine Framework | Crystals ground with CaCO3 for in situ PXRD under humid air/vacuum cycles.XRD non-ambient stage with CaCO3 standard · 50 mg MOF plus 50 mg CaCO3 standard | 8-9 · in situ PXRD characterization · Figures S12-S14 |
| Pressed pellet of Mn2(TTFTB)research_0190__mat__mat_mn2_ttftb | Pellet · Target Sample · Pristine Framework | As-synthesised materials ground and pressed into pellets; applies to Mn, Co, Cd, Zn analogues.glass slide with Ti/Au electrodes, gold wires and carbon paste · 6 mm inner-diameter pressing die; pressure approximately 20 MPa | 5 · Fabrication of pressed pellets devices · Figure S7 |
| Mn2(TTFTB) single-crystal two-contact device with Au wires/carbon pasteresearch_0190__mat__mat_mn2_ttftb | Single Crystal · Target Sample · Pristine Framework | Rod-like single crystal contacted along crystallographic c axis.glass slide with Ti/Au electrodes; gold wires and carbon paste contacts | 4 · Manual fabrication of single-crystal device |
| Zn2(TTFTB) powder-coated glassy carbon electrode for CVresearch_0190__mat__mat_zn2_ttftb | Electrode · Target Sample · Pristine Framework | Ground MOF powders suspended in ethanol and drop-cast before CV.glassy carbon disk electrode · 10 uL suspension drop-cast on 0.07 cm2 electrode | 9-10 · Cyclic voltammetry (CV) · Figure 6c |
| Pressed pellet of Zn2(TTFTB)research_0190__mat__mat_zn2_ttftb | Pellet · Target Sample · Pristine Framework | As-synthesised materials ground and pressed into pellets; applies to Mn, Co, Cd, Zn analogues.glass slide with Ti/Au electrodes, gold wires and carbon paste · 6 mm inner-diameter pressing die; pressure approximately 20 MPa | 5 · Fabrication of pressed pellets devices · Figure S7 |
| Polycrystalline Zn2(TTFTB) powder/crystals for CW-EPRresearch_0190__mat__mat_zn2_ttftb | Powder · Target Sample · Pristine Framework | Multiple as-synthesised crystals loaded for humid-air and vacuum CW-EPR.quartz EPR tube | 7 · CW-EPR characterization of poly-crystalline sample of Zn2(TTFTB) · Figure S10 |
| Single crystal of Zn2(TTFTB) for quantitative CW-EPRresearch_0190__mat__mat_zn2_ttftb | Single Crystal · Target Sample · Pristine Framework | Rod-like single crystal placed on solidified PPC; crystallographic c axis parallel to static magnetic field.PPC support in quartz tube | 7-8 · Single-crystal CW EPR characterization · Figures S23-S24 |
| Zn2(TTFTB) single-crystal two-contact device with Au wires/carbon pasteresearch_0190__mat__mat_zn2_ttftb | Single Crystal · Target Sample · Pristine Framework | Rod-like single crystal contacted along crystallographic c axis.glass slide with Ti/Au electrodes; gold wires and carbon paste contacts · large crystals above 500 um length and above 80 um cross-sectional width for manual device fabrication | 48161 · Mechanism of Chemiresistive Moisture Sensing |
| Zn2(TTFTB) micro/nanofabricated single-crystal device with sputtered Pt electrodesresearch_0190__mat__mat_zn2_ttftb | Single Crystal · Target Sample · Pristine Framework | Crystals spin-coated from IPA suspension, patterned by EBL, contacted with sputtered Pt electrodes.SiO2/Si substrate with Pt electrodes · average 25 um length and 247 nm cross-sectional width | 48161 · Mechanism of Chemiresistive Moisture Sensing · Figure 4 |