Biswas S., Chen Y., Xie Y. et al. · Analytical Chemistry · 2020 · 4566-4572
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.
AuHPCN-222/GCE provides trace-level ED detection with two DPV linear ranges, 0.5 nM LOD, good repeatability/reproducibility, and successful urine/tablet standard-addition recoveries.
Caveat: SI table of contents says Table S3 is human serum analysis, but the actual Table S3 title and main text describe pharmaceutical tablet analysis.
rendered page 6 / article p.4571 · Conclusion · Linked to 7 structured results
The paper discusses enhanced electrical conductivity/charge transport but does not report a direct bulk conductivity, mobility, Seebeck coefficient, or thermoelectric measurement for the MOF powders.
Caveat: Evidence is restricted to electrochemical impedance, CV currents, calculated active area and sensor performance.
rendered pages 3-6 / article pp.4568-4571 · Electrochemical Studies; Determination of ED · Figures 3-5; Table 1 · Linked to 2 structured results
Postsynthetic Au insertion into hollow and solid PCN-222 retains the individual PCN-222 MOF structures.
Caveat: CIF or single-crystal data were not provided in the assigned documents; phase retention is based on PXRD comparison.
rendered page 3 / article p.4568 · Characterizations · Figure 1a · Linked to 3 structured results
AuHPCN-222 contains subnanometre Au(0) species anchored within porphyrin coordination sites, supported by XPS, PXRD-derived size and EDX mapping rather than direct TEM visibility.
Caveat: The authors state Au(0) particles were not visible even in HRTEM; the assignment is inferential from elemental and spectroscopic evidence.
rendered page 3 / article p.4568 · Characterizations · Figure 2d · Linked to 5 structured results
AuHPCN-222/GCE has the highest ferri/ferrocyanide anodic current and lowest Rct among the tested electrodes, indicating improved interfacial charge transfer.
Caveat: Electrode-level result includes GCE substrate and drop-cast morphology; it is not a standalone MOF conductivity value.
rendered page 4 / article p.4569 · Electrochemical Studies · Figure 3a,b · Linked to 3 structured results
The hollow AuHPCN-222 morphology outperforms solid AuSPCN-222 for ED electrocatalysis, attributed to higher surface area and easier diffusion.
Caveat: Surface area for AuSPCN-222 was not reported, so the hollow-versus-solid comparison is mainly electrochemical and morphological.
rendered page 6 / article p.4571 · Conclusion · Linked to 4 structured results
ED electro-oxidation on AuHPCN-222/GCE is interpreted as a two-electron/two-proton process based on the Ep-pH slope.
Caveat: Laviron table gives n = 2.3 rather than exactly 2; interpretation is based on approximate agreement with the Nernstian 0.059 V pH-1 slope.
rendered page 4 / article p.4569 · Electrocatalytic activity toward ED · Figure 3d · Linked to 3 structured results
Gold insertion in the porphyrin sites is proposed to enhance electrical conductivity/charge transfer through a hopping mechanism within the MOF.
Caveat: No direct bulk conductivity measurement is reported; support comes from electrochemical current and impedance changes.
rendered page 2 / article p.4567 · Introduction · Linked to 4 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| AuHPCN-222Browse family: PCN-222 / MOF-545 | Au(0)-functionalised hollow PCN-222; XPS Au atomic percent 1.03%Zr-based PCN-222 nodes plus subnanometre Au(0) anchored in porphyrin coordination sites · TCPP porphyrin linker with postsynthetically inserted Au(0) | 3D · CompositeAu inserted into hollow PCN-222 with retained PCN-222 PXRD; XPS Au 4f peaks at 83.59 and 87.23 eV attributed to porphyrin-coordinated Au(0); EDX maps show homogeneous Zr, C, N, O and Au distribution. | rendered page 3 / article p.4568 · Results and Discussion · Figure 1b,c; Figure 2d; Table S1 |
| citrate-stabilised Au nanoparticles | Au nanoparticlesmetallic Au nanoparticles | 0D · Model SystemSpherical Au nanoparticles with diameter less than 20 nm, used as non-MOF electrode control. | rendered page 2 / article p.4567 · Experimental Section · Figure S1 |
| AuSPCN-222Browse family: PCN-222 / MOF-545 | Au(0)-functionalised solid PCN-222Zr-based PCN-222 nodes plus postsynthetically inserted Au(0) · TCPP porphyrin linker with postsynthetically inserted Au(0) | 3D · CompositeAu-inserted solid PCN-222 with retained MOF PXRD, used as morphology control against AuHPCN-222. | rendered page 3 / article p.4568 · Results and Discussion · Figure 1a; Figure 2b |
| hollow PCN-222 (HPCN-222)Browse family: PCN-222 / MOF-545 | Zr-porphyrin MOF, PCN-222 structureZr-based nodes from zirconium tetrachloride · meso-tetra(carboxyphenyl)porphyrin (TCPP) | 3D · PristinePowder X-ray diffraction peaks at 4.9, 7.2, 8.37 and 9.79 degrees match reported PCN-222; morphology described as hollow porous tube assembled from smaller nanocubes. | rendered page 2 / article p.4567 · Experimental Section; Results and Discussion · Figure 1a |
| solid PCN-222 (SPCN-222)Browse family: PCN-222 / MOF-545 | Zr-porphyrin MOF, PCN-222 structureZr-based nodes from zirconium tetrachloride · meso-tetra(carboxyphenyl)porphyrin (TCPP) | 3D · PristinePXRD pattern assigned to PCN-222; solid morphology used as comparison to hollow PCN-222. | rendered page 2 / article p.4567 · Experimental Section · Figure 1a |
| TCPP linker | [5,10,15,20-tetrakis(4-methoxycarbonylphenyl)porphyrin] / TCPP as reportedPorphyrin tetracarboxylate linker precursor used for PCN-222 synthesis | 0D · Model SystemLigand synthesis reported in the SI; included only to capture precursor synthesis supporting MOF recipes. | rendered pages S-3-S-4 · Ligand Synthesis |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| AuHPCN-222/GCEresearch_0179__mat__mat_auhpcn222 | Electrode · Target Sample · Composite | 5 uL water dispersion of AuHPCN-222 (1 mg mL-1) drop-cast on polished GCE and dried in desiccator.glassy carbon electrode, 3 mm diameter | rendered page 2 / article p.4567 · Preparation of Electrodes |
| AuHPCN-222 activated powderresearch_0179__mat__mat_auhpcn222 | Powder · Target Sample · Guest Loaded | HPCN-222 postsynthetically treated with aqueous H2AuCl4 in DMF at 80 C for 4 h, purified with ethanol and activated. | rendered page 2 / article p.4567 · Experimental Section |
| AuNP/GCEresearch_0179__mat__mat_aunp_control | Electrode · Pristine Control · Composite | Citrate-stabilised Au nanoparticles deposited on polished GCE by a similar electrode-preparation route.glassy carbon electrode | rendered page 4 / article p.4569 · Electrochemical Studies · Figure 3 |
| AuSPCN-222/GCEresearch_0179__mat__mat_auspcn222 | Electrode · Pristine Control · Composite | AuSPCN-222 deposited on polished GCE by the same drop-casting procedure as AuHPCN-222.glassy carbon electrode | rendered page 4 / article p.4569 · Electrochemical Studies · Figure 3 |
| AuSPCN-222 activated powderresearch_0179__mat__mat_auspcn222 | Powder · Pristine Control · Guest Loaded | SPCN-222 postsynthetically treated with aqueous H2AuCl4 in DMF at 80 C for 4 h, purified with ethanol and activated. | rendered page 2 / article p.4567 · Experimental Section |
| bare GCEresearch_0179__mat__mat_aunp_control | Electrode · Pristine Control · Unknown | Polished with 0.3 and 0.05 um Al2O3 slurries, sonicated in water and ethanol.glassy carbon electrode, 3 mm diameter | rendered page 2 / article p.4567 · Preparation of Electrodes |
| HPCN-222/GCEresearch_0179__mat__mat_hpcn222 | Electrode · Pristine Control · Composite | HPCN-222 deposited on polished GCE by the same drop-casting procedure as AuHPCN-222.glassy carbon electrode | rendered page 2 / article p.4567 · Preparation of Electrodes |
| HPCN-222 activated powderresearch_0179__mat__mat_hpcn222 | Powder · Pristine Control · Pristine Framework | Hydrothermal product washed with ethanol, solvent-exchanged in methanol and acetone, and vacuum-dried at 120 C. | rendered page 2 / article p.4567 · Experimental Section |
| SPCN-222 activated powderresearch_0179__mat__mat_spcn222 | Powder · Pristine Control · Pristine Framework | Solvothermal product isolated by centrifugation, washed with DMF, acetone-cycled, solvent-exchanged and vacuum-dried at 120 C. | rendered page 2 / article p.4567 · Experimental Section |
| TCPP ligand precursorresearch_0179__mat__mat_tcpp_ligand | Powder · Model System · Model | Ligand prepared through TPPCOOMe precursor and hydrolysis/acidification steps in SI. | rendered pages S-3-S-4 · Ligand Synthesis |