Primary studyCore evidenceThin Film Device

Conductive Metal-Organic Framework Thin Film Hybrids by Electropolymerization of Monosubstituted Acetylenes

Klyatskaya S., Kanj A.B., Molina-Jiron C. et al. · ACS Applied Materials and Interfaces · 2020 · 30972-30979

3materials
6samples
4synthesis routes
14measurements
55results
9claims 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

Growing Cu(BDC) SURMOF-2 directly on prepatterned interdigitated electrodes enabled in situ conductivity measurements without delaminating or separately processing the polymer/MOF hybrid.

main p.5 · Results and Discussion · Figure 4 · Linked to 2 structured results

CaveatSupport assessment: Medium

The SI bulk-solution EP control forms only very low-mass oligomers and shows nonhomogeneous polymer distribution, arguing against simple polymer formation on top of the SURMOF as the explanation for the target MALDI distribution.

Caveat: Control is qualitative and reported in SI, not as a quantitative transport comparison.

SI p.S-7 · Figure S6/S7 discussion · Figures S7-S8 · Linked to 1 structured result

CaveatSupport assessment: Medium

1-hexyne filling of Cu(BDC) pores is partial and not homogeneous within the MOF network.

Caveat: Filling rate is based on semi-quantitative EDX and literature/estimated structural parameters.

SI p.S-7 · Figure S5 discussion · Figures S5, S7, S8 · Linked to 3 structured results

Phase AssignmentSupport assessment: High

The Cu(BDC) SURMOF host framework remains crystalline and does not show contraction or symmetry change after guest loading and electropolymerisation.

Caveat: The XRD intensity is reported to decrease slightly after EP; figure-axis peak positions are approximate visual reads.

main p.4 · Results and Discussion · Figure 2b · Linked to 4 structured results

Structure Property LinkSupport assessment: High

In-pore electropolymerisation of BPA converts insulating Cu(BDC) SURMOF-2 into a conductive hybrid thin film with about eight orders of magnitude higher conductivity.

Caveat: The main text gives 0.098 S m-1, while the SI conductivity model refers to 0.16 S m-1.

main p.5 · Results and Discussion · Figure 4 · Linked to 3 structured results

Structure Property LinkSupport assessment: Medium

DFT geometry optimisation identifies a modified trans-transoid BPA conformation as the most likely conformation inside the Cu(BDC) channels.

Caveat: Computational geometry assignment; direct structural proof of polymer conformation in pores is indirect.

SI p.S-12 · Atomistic geometry of the MOF-Polymer system · Figure S11 · Linked to 1 structured result

Synthesis MechanismSupport assessment: High

1-hexyne monomers confined in the 1D channels of Cu(BDC) SURMOF-2 are cathodically electropolymerised to butyl-substituted polyacetylene oligomers.

Caveat: MALDI requires dissolving the framework and includes chemical noise/adduct interpretation.

main p.4 · Results and Discussion · Figures 2-3 · Linked to 4 structured results

Transport MechanismSupport assessment: Medium

The conductive BPA oligomers are inferred to be doped, likely p-doped by traces of chlorine generated from dichloromethane electrolysis.

Caveat: The chlorine p-doping assignment is proposed rather than directly quantified.

main p.5 · Results and Discussion · Figure 2a · Linked to 3 structured results

Transport MechanismSupport assessment: High

The final conductivity is limited by hopping between short polyacetylene oligomers rather than by intrachain transport along long polymer strands.

Caveat: Percolation model is an upper-bound calculation and uses simplified lattice and hopping assumptions.

main p.5 · Results and Discussion · Supporting Information · Linked to 4 structured results

Material identities

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

MaterialCompositionStructure contextSource
BPA@Cu(BDC)-SURMOF-2Butyl-substituted polyacetylene (BPA) oligomers confined in Cu(BDC) SURMOF-2Cu paddle-wheel metal nodes of the SURMOF host · BDC linkers plus 1-hexyne-derived butyl-substituted polyacetylene chains in pores3D · CompositeHybrid thin film in which confined 1-hexyne is electropolymerised to BPA inside the 1D channels of Cu(BDC) SURMOF-2; XRD peak positions are retained after electropolymerisation.main p.2 · Results and Discussion · Figure 1b,d
Cu(BDC) SURMOF-2Cu(BDC); BDC = 1,4-benzenedicarboxylateCu paddle-wheel metal nodes · 1,4-benzenedicarboxylate (BDC)3D · PristineSurface-mounted Cu(BDC) SURMOF-2 thin film with P4 symmetry and 1D channels propagating along the crystallographic [001] direction; oriented layer-by-layer films have channels running parallel to the substrate surface.main p.2 · Results and Discussion · Figure 1a
Modelled BPA@Cu(BDC) SURMOF systemModel system for BPA oligomers in Cu(BDC) SURMOF poresCu(BDC) host represented in DFT/percolation modelling · BDC plus modelled butyl-substituted polyacetylene oligomersunknown · Model SystemDFT and percolation model of confined BPA chains; most likely polymer conformation is a modified trans-transoid form fitting inside the MOF channel.SI p.S-12 · Atomistic geometry of the MOF-Polymer system · Figure S11

Sample register

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

Show 6 sample records
SampleForm and roleProcessing and geometrySource
BPA@Cu(BDC)-SURMOF-2 after electropolymerisationresearch_0523__mat__bpa_cu_bdc_surmoF2Electrode · Target Sample · Composite1-hexyne-loaded Cu(BDC) SURMOF-2 after cathodic constant-voltage electropolymerisation in dichloromethane/TBAHFP; some samples stored under argon for 3 months.Interdigitated gold electrodes for transport; Au/Ti/Si cathode for spectroscopy and product analysis · 100 +/- 5 nm MOF layer on gold electrode stackmain p.5 · Results and Discussion · Figure 4
Bulk-solution EP control using as-prepared SURMOF electroderesearch_0523__mat__bpa_cu_bdc_surmoF2Electrode · Unknown · CompositeControl experiment where 1-hexyne was electropolymerised from bulk solution in the presence of an as-prepared SURMOF electrode.As-prepared SURMOF used as electrodeSI p.S-7 · Figure S6/S7 discussion · Figure S7
1-hexyne-loaded Cu(BDC) SURMOF-2research_0523__mat__cu_bdc_surmoF2Thin Film · Composite Component · Guest LoadedActivated Cu(BDC) SURMOF-2 exposed to 20 mM 1-hexyne in dry dichloromethane for about 45 h under argon, then rinsed.Au/Ti/Si or interdigitated gold electrode substrate · approximately 100 nm parent SURMOF layerSI p.S-1 · 1-Hexyne loading and Electropolymerization
DFT/percolation model of BPA@Cu(BDC) SURMOFresearch_0523__mat__model_bpa_cu_bdcModel · Model System · ModelComputational model of confined BPA oligomers, electronic coupling between 1-hexyne monomer sites, and interchain hopping/percolation.SI p.S-13 · Conductivity Model for MOF-Polymer system · Figure S12
Pristine Cu(BDC) SURMOF-2 thin-film deviceresearch_0523__mat__cu_bdc_surmoF2Electrode · Pristine Control · Pristine FrameworkLayer-by-layer spray-deposited Cu(BDC) SURMOF-2 on prepatterned interdigitated gold electrodes before guest loading and EP.Metrohm interdigitated gold electrodes · 100 nm MOF film; SEM cross-section reports 100 +/- 5 nmmain p.5 · Results and Discussion · Figure 4; Figure S4
Pristine Cu(BDC) SURMOF-2 thin film on Au/Ti/Siresearch_0523__mat__cu_bdc_surmoF2Thin Film · Pristine Control · Pristine FrameworkLayer-by-layer spray-grown Cu(BDC) SURMOF-2 before guest loading.150 nm Au / 5 nm Ti deposited on Si wafers; MHDA self-assembled monolayer · 100 nm target thickness from 50 spray cyclesSI p.S-1 · Sample preparation