Primary studyCore evidenceTransport Physics

Mixed metal conductive MOFs constructed from Trypan blue linked metal nodes: characteristic features and electrochemical performance

Shukla S., Joshi N.N., Kadian S. et al. · Journal of Materials Chemistry C · 2024 · 3886-3901

10materials
15samples
5synthesis routes
55measurements
186results
6claims and caveats

Evidence map

Open a family to keep every result attached to its sample, method and conditions.

Author interpretations and caveats

Paraphrased for this database from the authors’ stated interpretations — never quoted verbatim — and kept separate from reported measurements.

Application RelevanceSupport assessment: High

P3 and P4 show better HER onset than P1/P2, whereas P1 and P2 show higher OER current densities.

Caveat: HER text states 1 M KOH, while Fig. 12 caption states 0.1 M KOH; supplied SI does not resolve the discrepancy.

3898-3899 · Electrochemical behavior studies · Fig. 12 · Linked to 4 structured results

Structure Property LinkSupport assessment: Medium

Mixed-metal MOFs, especially P1 and P2, deliver higher anodic current response than the Cu-Try control, attributed to faster electron delocalisation and 3d-3d metal connectivity.

Caveat: Peak currents are measured on graphite paste composite electrodes and may include electrode formulation effects.

3895-3896 · Electrochemical behavior studies · Fig. 8 · Linked to 3 structured results

Structure Property LinkSupport assessment: Medium

Thermal treatment increases electrochemical current response, attributed to carbonisation of organic linkers into conductive carbon frameworks.

Caveat: Main text provides qualitative comparison only; no numerical Fig. 10 values extracted.

3897-3898 · Electrochemical behavior studies · Fig. 10 · Linked to 1 structured result

Structure Property LinkSupport assessment: High

Trypan blue remains chemically intact during MOF synthesis, preserving azo, C=C, and sulfonate linkages that support conjugation and metal coordination.

Caveat: Based on FTIR/UV-vis interpretation in the main text; supplied SI does not add raw FTIR or UV-vis tables.

3891 · Spectroscopic analyses · Fig. 4 · Linked to 4 structured results

Transport MechanismSupport assessment: Medium

3d-3d MOFs P1 and P2 are proposed to have lower charge-transfer resistance than 3d-4f P3/P4 because overlapping d orbitals provide more continuous electron pathways.

Caveat: Rct values are not numerically tabulated in the main text; this is a qualitative Nyquist interpretation.

3896-3897 · Electrochemical behavior studies · Fig. 9(f) · Linked to 1 structured result

Transport MechanismSupport assessment: High

Charge transport in the Trypan-blue MOFs is assigned predominantly to electron hopping rather than band-like delocalisation because all reported mobilities are below 0.1 cm^2 V^-1 s^-1.

Caveat: Mobility is CV-derived, not direct field-effect or four-probe mobility.

3896 · Electrochemical behavior studies · Eqns 1-2; Fig. 9 · Linked to 5 structured results

Material identities

Names and aliases are kept exactly within the paper’s own identity model.

MaterialCompositionStructure contextSource
Co-Try MOFNot specifiedCo · Trypan blue (Try)unknown · PristineNot reported; used as a single-metal CV comparator.3897, 3899 · Electrochemical behavior studies · Fig. 11; Fig. S12-S15
Cu-Try MOF (E)Cu1.45C4.5O2.5NCu · Trypan blue (Try)3D · PristineMonoclinic P21/c; high crystallinity by PXRD.3889, 3892 · Results and discussion; Table 1 · Fig. 2; Table 1
Er-Try MOFNot specifiedEr · Trypan blue (Try)unknown · PristineNot reported; used as a single-metal CV comparator.3897, 3899 · Electrochemical behavior studies · Fig. 11; Fig. S12-S15
Cu-Co-Try MOF (P1)Cu2.1Co1.2C8O5.8NCu and Co · Trypan blue (Try)3D · PristinePolymorphic mixture assigned to P3221 hexagonal, Pm3m cubic, and C2/c monoclinic components.3886, 3889, 3892 · Abstract; Results and discussion; Table 1 · Table 1
Cu-Zn-Try MOF (P2)Cu0.4Zn0.9C4.6O2.7NCu and Zn · Trypan blue (Try)3D · PristinePolymorphic mixture of P21/c1 monoclinic and P-1 triclinic components.3886, 3889, 3892 · Abstract; Results and discussion; Table 1 · Table 1
Cu-Er-Try MOF (P3)Cu0.06Er1.0C7.2O1.0NCu and Er · Trypan blue (Try)3D · PristinePolymorphic mix of two monoclinic P121/n1 systems; semi-crystalline by PXRD.3886, 3889, 3892, 3894 · Abstract; Results and discussion; Table 1 · Table 1; Fig. 6
Cu-Yb-Try MOF (P4)Cu0.1Yb1.1C9.7O3.9NCu and Yb · Trypan blue (Try)3D · PristineSemi-crystalline by PXRD; P4 XRD pattern shown in SI Fig. S11.3886, 3889, 3894 · Abstract; Results and discussion · Fig. S11 cited
Thermally treated Trypan-blue MOFs P1-P4Not specifiedCu/Co/Zn/Er/Yb depending on parent MOF · Carbonised/decomposed Trypan-blue-derived frameworkunknown · DerivedThermally treated at 280 C and 580 C for electrochemical comparison; high-temperature treatment attributed to carbonisation.3898 · Electrochemical behavior studies · Fig. 10
Yb-Try MOFNot specifiedYb · Trypan blue (Try)unknown · PristineNot reported; used as a single-metal CV comparator.3897, 3899 · Electrochemical behavior studies · Fig. 11; Fig. S12-S15
Zn-Try MOFNot specifiedZn · Trypan blue (Try)unknown · PristineNot reported; used as a single-metal CV comparator.3897, 3899 · Electrochemical behavior studies · Fig. 11; Fig. S12-S15

Sample register

Sample form, processing state and composition status define the context for measurements.

Show 15 sample records
SampleForm and roleProcessing and geometrySource
Co-Try MOF graphite paste electroderesearch_0251__mat__m_co_try_controlElectrode · Pristine Control · Compositesingle-metal MOF comparator electrode; preparation route not reported in main text or SIgraphite paste electrode, inferred from electrochemical comparison context3897, 3899 · Electrochemical behavior studies · Fig. 11; Fig. S12-S15
Cu-Try MOF graphite paste electrode (E)research_0251__mat__m_e_cu_tryElectrode · Pristine Control · Compositefinal ground MOF converted to paste with graphite powder at 10:1 and filled into GPE3 mm graphite paste electrode well3888 · Electrochemical measurements · Section 2.4
Cu-Try MOF powder (E)research_0251__mat__m_e_cu_tryPowder · Pristine Control · Pristine Frameworkas-synthesised, centrifuged, ethanol-washed, vacuum-dried at 100 C for 12 h3888 · Synthesis of MOFs · Section 2.2
Er-Try MOF graphite paste electroderesearch_0251__mat__m_er_try_controlElectrode · Pristine Control · Compositesingle-metal MOF comparator electrode; preparation route not reported in main text or SIgraphite paste electrode, inferred from electrochemical comparison context3897, 3899 · Electrochemical behavior studies · Fig. 11; Fig. S12-S15
Cu-Co-Try MOF graphite paste electrode (P1)research_0251__mat__m_p1_cu_co_tryElectrode · Target Sample · Compositefinal ground MOF converted to paste with graphite powder at 10:1 and filled into GPE3 mm graphite paste electrode well3888 · Electrochemical measurements · Section 2.4
Cu-Co-Try MOF powder (P1)research_0251__mat__m_p1_cu_co_tryPowder · Target Sample · Mixed Metalas-synthesised, centrifuged, ethanol-washed, vacuum-dried at 100 C for 12 h3888 · Synthesis of MOFs · Section 2.2
Cu-Zn-Try MOF graphite paste electrode (P2)research_0251__mat__m_p2_cu_zn_tryElectrode · Target Sample · Compositefinal ground MOF converted to paste with graphite powder at 10:1 and filled into GPE3 mm graphite paste electrode well3888 · Electrochemical measurements · Section 2.4
Cu-Zn-Try MOF powder (P2)research_0251__mat__m_p2_cu_zn_tryPowder · Target Sample · Mixed Metalas-synthesised, centrifuged, ethanol-washed, vacuum-dried at 100 C for 12 h3888 · Synthesis of MOFs · Section 2.2
Cu-Er-Try MOF graphite paste electrode (P3)research_0251__mat__m_p3_cu_er_tryElectrode · Target Sample · Compositefinal ground MOF converted to paste with graphite powder at 10:1 and filled into GPE3 mm graphite paste electrode well3888 · Electrochemical measurements · Section 2.4
Cu-Er-Try MOF powder (P3)research_0251__mat__m_p3_cu_er_tryPowder · Target Sample · Mixed Metalas-synthesised, centrifuged, ethanol-washed, vacuum-dried at 100 C for 12 h3888 · Synthesis of MOFs · Section 2.2
Cu-Yb-Try MOF graphite paste electrode (P4)research_0251__mat__m_p4_cu_yb_tryElectrode · Target Sample · Compositefinal ground MOF converted to paste with graphite powder at 10:1 and filled into GPE3 mm graphite paste electrode well3888 · Electrochemical measurements · Section 2.4
Cu-Yb-Try MOF powder (P4)research_0251__mat__m_p4_cu_yb_tryPowder · Target Sample · Mixed Metalas-synthesised, centrifuged, ethanol-washed, vacuum-dried at 100 C for 12 h3888 · Synthesis of MOFs · Section 2.2
Thermally treated P1-P4 MOF setresearch_0251__mat__m_thermally_treated_try_mofsElectrode · Paper Level Unspecified · Derived Carbonparent P1-P4 MOFs thermally treated at 280 C or 580 C before CV comparisonelectrode used for CV comparison3898 · Electrochemical behavior studies · Fig. 10
Yb-Try MOF graphite paste electroderesearch_0251__mat__m_yb_try_controlElectrode · Pristine Control · Compositesingle-metal MOF comparator electrode; preparation route not reported in main text or SIgraphite paste electrode, inferred from electrochemical comparison context3897, 3899 · Electrochemical behavior studies · Fig. 11; Fig. S12-S15
Zn-Try MOF graphite paste electroderesearch_0251__mat__m_zn_try_controlElectrode · Pristine Control · Compositesingle-metal MOF comparator electrode; preparation route not reported in main text or SIgraphite paste electrode, inferred from electrochemical comparison context3897, 3899 · Electrochemical behavior studies · Fig. 11; Fig. S12-S15