Primary studyCore evidenceThin Film Device

A simplistic approach for the synthesis of Covalent Organic Frameworks(COFs) comprising of tetrafunctionalized porphyrin and polyoxometalates to uncover catalytic applications

Rani S., Tariq M., Bhatti M.H. et al. · Optical Materials · 2023 · 113672

5materials
9samples
6synthesis routes
16measurements
137results
7claims 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

Langmuir RL values below 1 indicate favourable adsorption of both P@Ni-AndCOF and P@Cu-AndCOF on TiO2.

Caveat: Langmuir/Freundlich constants are reported from linearised isotherm fits; raw adsorption data are only plotted, not tabulated.

SI p.25 · Tables S13-S14 · Table S13 · Linked to 2 structured results

Application RelevanceSupport assessment: Medium

The COFs retained structural integrity after photodegradation according to recovered FT-IR spectra and colour observations.

Caveat: Recycling quantification is qualitative in the main text; no cycle-by-cycle SI table was provided.

main p.9-10 · 3.1 Photodegradation application · Figures 1 and 8 · Linked to 4 structured results

Application RelevanceSupport assessment: Medium

The small optical band gaps and reported conductivities of the ITO-coated P@Ni-AndCOF and P@Cu-AndCOF films support their assignment as semiconducting photoelectrode materials.

Caveat: Conductivity is calculated from optical conductance equations rather than a direct four-probe transport measurement.

main p.15 · 4. Conclusion · Table 2 · Linked to 4 structured results

CaveatSupport assessment: High

The P@Cu-AndCOF Williamson-Hall crystallite size and strain are internally inconsistent between the main text and SI Table S6; the SI table values were used for extracted numeric rows.

Caveat: Main text states 27.34792899 nm and -0.80557; SI Table S6 reports 16.7053012 nm and 0.3874.

SI p.8 · Table S6 · Table S6 · Linked to 2 structured results

Phase AssignmentSupport assessment: Medium

FT-IR and 1H NMR data support covalent interaction between the porphyrin moiety and the Anderson POM anion in P@Ni-AndCOF and P@Cu-AndCOF.

Caveat: Assignments are based on FT-IR/NMR peak shifts and disappearance of OH peaks; no crystallographic structure is provided.

main p.4 · 3. Results and discussion · Figure 1; Table S1 · Linked to 2 structured results

Transport MechanismSupport assessment: High

Conducting electrolyte was required for measurable photocurrent; without electrolyte the observed photocurrent was 0 A.

Caveat: Figure 12 values are graphical and only approximate without underlying SI/raw data.

main p.12 · 3.4 Concentration effect · Figure 12 · Linked to 2 structured results

Transport MechanismSupport assessment: Medium

Photocurrent increased with light intensity and followed the reported order sunlight > 200 W bulb > 100 W bulb > 3 W LED > darkness.

Caveat: Text reports the general intensity order, but Table S10 shows 200 W bulb exceeds sunlight for both samples; the text attributes sunlight differences to cloudy weather.

SI p.14 · Table S10 · Table S10 · Linked to 4 structured results

Material identities

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

MaterialCompositionStructure contextSource
Anderson POMalpha-Anderson POM, exact precursor formula not specified in main textAnderson polyoxomolybdate POM with Ni or Cu introduced during COF synthesis.0D · Model SystemPolyoxometalate precursor/control.main p.2 · 2.2. Synthesis of P@M-And COF
P@4OOMe-ZnNot specifiedZn-metalloporphyrin precursor. · Methyl 4-formylbenzoate-derived porphyrin precursor P@4OOMe.0D · Model SystemMolecular precursor used to synthesize Tris@ZnP.SI text · Experimental Details; Synthesis of P@4OOMe-Zn
P@Cu-AndCOF[N(C4H9)4]3(CuMo6O18)4{HNC(CH2O)3}4{(CO)4C44H24N4Zn}Cu-centred Anderson polyoxomolybdate units and Zn-metalloporphyrin centres. · Tetrafunctionalized Tris@ZnP porphyrin connected to Anderson POM units through amide/alkoxo functionality.unknown · PristineCovalent organic framework/polymer P@M-AndCOF; PXRD indicates crystalline framework and SEM indicates rod-like crystalline polymer morphology.main p.3 · 2.2. Synthesis of P@M-And COF · Scheme 1
P@Ni-AndCOF[N(C4H9)4]3(NiMo6O18)4{HNC(CH2O)3}4{(CO)4C44H24N4Zn}Ni-centred Anderson polyoxomolybdate units and Zn-metalloporphyrin centres. · Tetrafunctionalized Tris@ZnP porphyrin connected to Anderson POM units through amide/alkoxo functionality.unknown · PristineCovalent organic framework/polymer P@M-AndCOF; PXRD indicates crystalline framework and SEM indicates rod-like crystalline polymer morphology.main p.3 · 2.2. Synthesis of P@M-And COF · Scheme 1
Tris@ZnP[{HNC(CH2OH)3}4{(CO)4C44H24N4Zn}].8H2OZn-metalloporphyrin centre. · Tetrafunctionalized porphyrin precursor prepared from P@4OOMe-Zn and tris(hydroxymethyl)aminomethane.0D · Model SystemMolecular porphyrin precursor/control for the COFs.main p.2 · 2.1. Synthesis of Tris@ZnP

Sample register

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

Show 9 sample records
SampleForm and roleProcessing and geometrySource
Anderson POM control sampleresearch_0684__mat__m_anderson_pomUnknown · Pristine Control · ModelControl compound used in FT-IR, UV-vis, PXRD/optical band-gap and comparative electrochemical context.main p.4-5 · Results and discussion · Figures 1-4; Table 1
P@4OOMe-Zn purple powder precursorresearch_0684__mat__m_p4oome_znpPowder · Pristine Control · ModelPurple zinc-containing powder produced after solvent removal, DCM dissolution and aqueous washing.SI text · Experimental Details; Synthesis of P@4OOMe-Zn
P@Cu-AndCOF bulk solidresearch_0684__mat__m_pcu_andcofPowder · Target Sample · Pristine FrameworkPurple compound prepared by the same P@M-AndCOF route using Cu(CH3COO)2.H2O.main p.3 · 2.2. Synthesis of P@M-And COF
ITO/TiO2/P@Cu-AndCOF thin-film electroderesearch_0684__mat__m_pcu_andcofElectrode · Composite Sample · CompositeP@Cu-AndCOF concentrated DMF solution spread on dry TiO2-coated ITO film and oven-dried; assembled with I-/I3- ethylene glycol electrolyte and carbon-black counter electrode for photocurrent.Indium tin oxide electrode coated with TiO2/vinegar paste. · 27.948 nm calculated film thickness in Table 2.main p.3-4 · 2.3. Fabrication of thin films · Table 2
P@Cu-AndCOF adsorption system on TiO2research_0684__mat__m_pcu_andcofUnknown · Composite Sample · Composite100 mL P@Cu-AndCOF solution with initial concentrations 2.4-2.5 mg/L; 0.03 g TiO2 added and stirred 2 h before UV-vis equilibrium measurement.TiO2 adsorbent particles in DMF/CH3CN solution.main p.4 · 2.4. Adsorption experiment · Figures 16-17
P@Ni-AndCOF bulk solidresearch_0684__mat__m_pni_andcofPowder · Target Sample · Pristine FrameworkGreenish-brown compound collected by centrifugation, washed with ether, and dried in a vacuum desiccator.main p.3 · 2.2. Synthesis of P@M-And COF
ITO/TiO2/P@Ni-AndCOF thin-film electroderesearch_0684__mat__m_pni_andcofElectrode · Composite Sample · CompositeP@Ni-AndCOF concentrated DMF solution spread on dry TiO2-coated ITO film and oven-dried; assembled with I-/I3- ethylene glycol electrolyte and carbon-black counter electrode for photocurrent.Indium tin oxide electrode coated with TiO2/vinegar paste. · 134.257 nm calculated film thickness in Table 2.main p.3-4 · 2.3. Fabrication of thin films · Table 2
P@Ni-AndCOF adsorption system on TiO2research_0684__mat__m_pni_andcofUnknown · Composite Sample · Composite100 mL P@Ni-AndCOF solution with initial concentrations 2.4-2.5 mg/L; 0.03 g TiO2 added and stirred 2 h before UV-vis equilibrium measurement.TiO2 adsorbent particles in DMF/CH3CN solution.main p.4 · 2.4. Adsorption experiment · Figures 16-17
Tris@ZnP solution/control sampleresearch_0684__mat__m_tris_znpUnknown · Pristine Control · ModelDMSO or DMF/CH3CN solution used as precursor/control in UV-vis and CV comparisons.main p.5-6 · Results and discussion · Figures 2-4; Table 1