Singh P., Mukundan G., Badhulika S. · Microchemical Journal · 2024 · 109727
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 ZnS/MnO2-MOF hydrogel is claimed to be a sensitive and selective DPV sensor for GSH in simulated blood serum.
Caveat: Application evidence is in simulated blood serum rather than clinical human serum; SI Table S2 verifies recovery and RSD values.
p.10 · 4. Conclusion · Linked to 8 structured results
SI Table S1 presents the electrochemical ZnS/MnO2-MOF hydrogel sensor as having the lowest detection limit and widest linear range among the listed glutathione determination methods.
Caveat: Comparator values are reproduced literature benchmarks rather than first-hand measurements in this article.
p.2-p.3 · Supplementary Information · Table S1 · Linked to 6 structured results
Although the article repeatedly describes good conductivity/electroconductibility, no direct electrical conductivity value is reported in the main text.
Caveat: EIS charge-transfer resistance is captured as the closest transport-relevant metric.
p.7 · 3.3. Electrochemical analysis and optimization · Fig. 5(d) · Linked to 2 structured results
Combining ZnS/MnO2-MOF with PVA/Nafion hydrogel is claimed to create high surface area, efficient conductive pathways, adsorption capacity and vacancies that improve GSH electro-oxidation.
Caveat: The paper does not report a direct bulk electrical conductivity; transport support is mainly EIS Rct, CV response and morphology/porosity.
p.2 · 1. Introduction · Linked to 6 structured results
XRD peaks assigned to MnO2 and ZnS confirm both components on the hydrogel surface and suggest a cubic MOF-related arrangement.
Caveat: No CIF, Rietveld refinement or complete crystallographic structure is supplied in the main text.
p.6 · 3.2. Structural and chemical analysis · Fig. 3(a) · Linked to 6 structured results
The interconnected nanofibre-porous hydrogel network is claimed to facilitate rapid electron movement, ionic transport and improved electrocatalytic performance.
Caveat: Electron-pathway language is mechanistic interpretation; no independent electronic mobility or DC conductivity measurement is reported.
p.5 · 3.1. Morphological analysis · Fig. 2 · Linked to 4 structured results
The scan-rate calibration slope greater than 0.5 is interpreted as evidence for adsorption-controlled charge transfer at the electrode/electrolyte interface.
Caveat: The slope unit and exact fit definition are not fully specified in the main text.
p.7 · 3.3. Electrochemical analysis and optimization · Fig. 5(c) · Linked to 2 structured results
GSH adsorbs on the hydrogel surface and is electro-oxidised to GSSG through GS- radical/intermediate chemistry at active sites including oxygen and sulphur vacancies.
Caveat: Mechanism is presented schematically and by electrochemical response; no direct in situ chemical identification is reported.
p.8-p.9 · 3.4. Electrochemical sensing of glutathione · Fig. 7 · Linked to 3 structured results
Names and aliases are kept exactly within the paper’s own identity model.
| Material | Composition | Structure context | Source |
|---|---|---|---|
| Simulated blood serum electrolyte | CaCl2/KCl/NaCl aqueous solution, pH 7.40 | unknown · Model SystemModel biological sample solution for GSH recovery testing. | p.5 · 2.7. Real sample analysis |
| ZnS/MnO2 metal organic framework | ZnS/MnO2-MOF; exact framework formula not reportedZnS and MnO2 metal centres/activated components coordinated by carboxylate groups. · Trimesic acid (C9H6O6, 1,3,5-benzenetricarboxylic acid). | 3D · PristinePorous crystalline MOF formed by coordination of trimesic acid carboxylates to ZnS and MnO2 centres; XRD of hydrogel-associated MOF is described as closely resembling a cubic arrangement. | p.2 · 2.3.1. Mechanism of synthesis of ZnS/MnO2 - MOF |
| ZnS/MnO2-MOF hydrogel | ZnS/MnO2-MOF/PVA/Nafion hydrogel; exact formula not reportedZnS/MnO2-MOF component embedded in polymer hydrogel. · Trimesic acid linker in MOF; polyvinyl alcohol and Nafion in hydrogel matrix. | 3D · CompositeHighly porous hydrogel network containing ZnS/MnO2-MOF, PVA and Nafion; SEM shows interconnected porous/nanofibre morphology. | p.1 · Abstract |
| ZnS nanopowder | ZnSZn-containing inorganic ZnS nanopowder precursor; no MOF node assignment. | 0D · UnknownHydrothermally prepared ZnS nanopowder used as a component in ZnS/MnO2-MOF synthesis. | p.2 · 2.2. Hydrothermal synthesis of ZnS · Fig. 1(a) |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| Simulated blood serum for GSH standard additionresearch_0327__mat__simulated_blood_serum | Model · Model System · Model | Aqueous salt solution adjusted to pH 7.40. | p.5 · 2.7. Real sample analysis |
| 2 wt% ZnS/MnO2-MOF hydrogel electroderesearch_0327__mat__zns_mno2_mof_hydrogel | Electrode · Composite Sample · Composite | 1 cm x 1 cm lyophilised ZnS/MnO2-MOF/PVA/Nafion hydrogel; 2 wt% MOF loading selected after optimisation.Self-supported hydrogel substrate used directly as working electrode. | p.3 · 2.4. Synthesis of ZnS/MnO2 - MOF hydrogel · Fig. 1(c) |
| H2O-treated ZnS/MnO2-MOF hydrogel electroderesearch_0327__mat__zns_mno2_mof_hydrogel | Electrode · Composite Sample · Composite | Hydrogel after H2O treatment for EIS comparison; exact treatment protocol not supplied in main text.Self-supported hydrogel substrate after H2O treatment. | p.7 · 3.3. Electrochemical analysis and optimization · Fig. 5(d) |
| Solvothermal ZnS/MnO2-MOF powderresearch_0327__mat__zns_mno2_mof | Powder · Composite Component · Mixed Metal | Autoclaved at 180 C for 20 h, washed with ethanol and dried overnight at 80 C. | p.2 · 2.3. Solvothermal synthesis of ZnS/MnO2 - MOF · Fig. 1(b) |
| Hydrothermal ZnS nanopowderresearch_0327__mat__zns_nanopowder | Powder · Composite Component · Unknown | Washed, centrifuged and dried at 80 C after hydrothermal synthesis. | p.2 · 2.2. Hydrothermal synthesis of ZnS · Fig. 1(a) |