Primary studyCore evidenceTransport Physics

Double advantages of 2D coordination polymer of coumarinyl-pyridyl Schiff base decorated Zn(II): The fabrication of Schottky device and Anti-carcinogenic activity

Paul S., Dutta B., Das P. et al. · Applied Organometallic Chemistry · 2023 · e7160

2materials
5samples
3synthesis routes
11measurements
102results
7claims and caveats

Evidence map

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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

Zn(II)-CP shows strongest cytotoxic activity against HeLa cells and induces ROS-associated apoptosis, G2/M arrest and caspase activation.

Caveat: Biological data are application context rather than conductive-MOF transport evidence.

10 · 4 Conclusion · Linked to 5 structured results

Application RelevanceSupport assessment: High

The low optical band gap and measurable conductivity motivated fabrication of a Zn(II)-CP Schottky diode.

Caveat: Transport is reported for a spin-coated thin film with incomplete DMF solution concentration/loading details.

10 · 4 Conclusion · Linked to 4 structured results

CaveatSupport assessment: High

The DFT HOMO-LUMO gap differs from the experimental band gap, which the authors attribute to modelling only a single monomeric unit rather than the extended CP.

4 · 3.2 Opto-electrical property · Figure 3 · Linked to 4 structured results

Phase AssignmentSupport assessment: High

Zn(II)-CP is assigned as a pristine 2D square-grid Zn(II) coordination polymer with BDC bridges and terminal QPR ligands.

Caveat: PXRD phase-purity evidence is qualitative; full CIF coordinates were not part of the assigned local documents.

4 · 3.1 Crystal structure · Figure 1 · Linked to 8 structured results

Structure Property LinkSupport assessment: Medium

The authors attribute conductivity to metal-dependent charge transport through non-covalent bonding interactions rather than through-bond transport through Zn-O carboxylate or organic-ligand backbones.

Caveat: Mechanistic interpretation is qualitative and supported by DFT discussion rather than direct charge-transport pathway measurement.

4 · 3.2 Opto-electrical property · Linked to 2 structured results

Transport MechanismSupport assessment: High

Light irradiation improves the Zn(II)-CP thin-film conductivity by about 15% and yields a near-ideal diode ideality factor of 0.99.

Caveat: No raw I-V data are provided in the supplied text; extraction relies on Table 1.

4 · 3.2 Opto-electrical property · Table 1 · Linked to 4 structured results

Transport MechanismSupport assessment: Medium

Forward-bias transport is interpreted as Ohmic in region I and trap-assisted space-charge-limited conduction in region II.

Caveat: Region slopes are described approximately in the main text and not digitised from the plotted data.

5-6 · 3.2 Opto-electrical property · Figure 5 · Linked to 4 structured results

Material identities

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

MaterialCompositionStructure contextSource
7-[(pyridin-4-ylmethylene)-amino]-chromen-2-one (QPR)C15H10N2O2none · coumarinyl-pyridyl Schiff base0D · Pristinemolecular ligand precursor2 · 2.1.1 Synthetic procedure of 7-[(pyridin-4-ylmethylene)-amino]-chromen-2-one (QPR) · Scheme 1
[Zn2(BDC)4(QPR)2(H2O)]n (Zn(II)-CP)[Zn2(BDC)4(QPR)2(H2O)]n; elemental-analysis formula reported as C24H18N2O7ZnZn(II) paddle-wheel units; distorted square-pyramidal ZnO4N coordination · BDC2- = 1,4-benzenedicarboxylato; QPR = 7-[(pyridin-4-ylmethylene)-amino]-chromen-2-one2D · Pristinetriclinic P-1, Z = 2; 2D square-grid coordination polymer with 3D supramolecular assembly1 · Abstract

Sample register

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

Show 5 sample records
SampleForm and roleProcessing and geometrySource
QPR light-brown crystalline ligandresearch_0471__mat__qpr_ligandSingle Crystal · Target Sample · Unknownfiltered and slow-evaporated after Schiff-base reaction2 · 2.1.1 · Scheme 1
as-synthesised powdered Zn(II)-CPresearch_0471__mat__zncpPowder · Target Sample · Pristine Frameworkas-synthesised bulk material4 · 3.1 Crystal structure · Figure S7
DFT model of Zn(II)-CP asymmetric unitresearch_0471__mat__zncpModel · Model System · Modelgas-phase geometry optimisation using SCXRD coordinatesDFT computation
ITO/Zn(II)-CP/Al Schottky diode thin filmresearch_0471__mat__zncpThin Film · Target Sample · Pristine Frameworkspin-coated from DMF solution on ITO, vacuum dried, Al evaporatedITO-coated glass with evaporated Al top electrode · nearly one micrometerFabrication and characterization of ITO/Compound/Al based Schottky Barrier Diode
Zn(II)-CP single crystalresearch_0471__mat__zncpSingle Crystal · Target Sample · Pristine Frameworkbrown block crystal from slow liquid-layer diffusion3 · X-Ray Diffraction Measurement · Table S1