Yildirim M., Kaya I. · Synthetic Metals · 2011 · 13-22
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 authors propose the polymer as a possible gas-sensing material for electro-acceptor gases such as iodine vapour, based on conductivity change upon iodine exposure.
Caveat: No gas-sensing device metrics such as sensitivity, response time, selectivity, cycling, or detection limit are reported.
22 · 4. Conclusion · Linked to 2 structured results
The target material is reported as a soluble Cr(III)-containing chelate/coordination polymer, not as a crystalline porous MOF; no porosity, surface area, or crystallographic framework data are reported.
Caveat: The database category is conductive-MOF evidence, but this article's first-hand material is a conjugated coordination polymer analogue.
13-16 · Abstract; 2.2. Syntheses of the compounds · Scheme 1; Scheme 2 · Linked to 2 structured results
The polymer has a lower optical and electrochemical band gap than MC-1 and MC-2, which the authors attribute to its polyconjugated structure.
Caveat: Band gaps are reported from UV-vis absorption edges and CV-derived HOMO/LUMO levels, not from direct electronic transport activation fits.
19-20 · 3.3. Optical and electrochemical properties · Table 2; Fig. 6 · Linked to 4 structured results
The authors propose that iodine doping forms a charge-transfer complex with imine nitrogen, producing polaron/radical-cation character and enhanced delocalised electron movement through the chain.
Caveat: Mechanism is inferred from conductivity and absorption changes rather than direct spectroscopic identification of charged species.
20-21 · 3.4. Doping procedure and electrical conductivities · Scheme 3; Fig. 8 · Linked to 2 structured results
Iodine vapour doping strongly increases polymer-film conductivity, with the highest reported value about 4 x 10^-3 S cm^-1 at 80 deg C after long doping.
Caveat: Most conductivity values are read from a log-axis plot and no error bars or device dimensions are reported.
20 · 3.4. Doping procedure and electrical conductivities · 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 |
|---|---|---|---|
| MC-1 Schiff-base model compound | Not specifiednone · FDA condensed with two equivalents of 3,4-dihydroxybenzaldehyde | 0D · Model SystemMonomeric organic Schiff-base model compound assigned by FT-IR and NMR. | 14 · 2.2. Syntheses of the compounds · Scheme 1a |
| MC-2 Cr-coordinated dialdehyde model compound | Not specifiedCr(III) coordinated by two 3,4-dihydroxybenzaldehyde ligands · 3,4-dihydroxybenzaldehyde (3,4-HBA) | 0D · Model SystemCr-coordinated dialdehyde molecule assigned from Scheme 1b, FT-IR Cr-O band, TGA/ICP-AES chromium content, and spectral comparison. | 14-17 · 2.2. Syntheses of the compounds; 3.1. Solubility and structures · Scheme 1b; Table 1 |
| poly(3,4-HBA-Cr-FDA) | Not specifiedCr(III) ions coordinated by catecholate/phenolate oxygen donors from 3,4-dihydroxybenzaldehyde-derived units · 9,9'-bis(4-aminophenyl)fluorene (FDA) condensed with Cr-coordinated 3,4-dihydroxybenzaldehyde (3,4-HBA) units to form azomethine linkages | 1D · PristineLinear conjugated chelate/coordination polymer assigned from Scheme 1-2, FT-IR Cr-O and imine bands, NMR, SEC molecular weight, and red-shifted UV-vis spectra; no crystalline MOF framework or porosity is reported. | 13-16 · Abstract; 2.2. Syntheses of the compounds; 3.1. Solubility and structures · Scheme 1; Scheme 2 |
Sample form, processing state and composition status define the context for measurements.
| Sample | Form and role | Processing and geometry | Source |
|---|---|---|---|
| MC-1 model compoundresearch_0731__mat__mat_mc1 | Powder · Model System · Model | Filtered precipitated Schiff base, recrystallised from acetonitrile, and dried in a vacuum desiccator. | 14 · 2.2. Syntheses of the compounds · Scheme 1a |
| MC-2 Cr-coordinated dialdehyderesearch_0731__mat__mat_mc2 | Powder · Model System · Model | MC-2 solution precipitated with toluene, filtered, washed with toluene, and vacuum oven dried for 24 h. | 15-16 · 2.2. Syntheses of the compounds; 2.3. Characterization techniques · Scheme 1b |
| poly(3,4-HBA-Cr-FDA) bulk chelate polymerresearch_0731__mat__mat_poly_cr_hba_fda | Powder · Target Sample · Pristine Framework | Precipitated into toluene, washed with toluene and acetonitrile, and vacuum dried for 24 h. | 15 · 2.2. Syntheses of the compounds |
| iodine-doped poly(3,4-HBA-Cr-FDA) film on ITOresearch_0731__mat__mat_poly_cr_hba_fda | Thin Film · Target Sample · Doped | Dip-coated polymer film exposed to iodine vapour at atmospheric pressure for 1 h, 5 h, or 24 h.indium-tin-oxide (ITO) glass plate | 16 · 2.5. Electrical properties · Fig. 7; Fig. 8 |
| undoped poly(3,4-HBA-Cr-FDA) film on ITOresearch_0731__mat__mat_poly_cr_hba_fda | Thin Film · Target Sample · Pristine Framework | Dip-coated from 50 mg/mL methanol solution for 50 dipping cycles; dried 1 min after each dipping.indium-tin-oxide (ITO) glass plate | 16 · 2.5. Electrical properties |