Charge Transfer and Delocalization in Conjugated (Ferrocenylethynyl)oligothiophene Complexes
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Bibliographic record
Abstract
A series of conjugated mono(ferrocenylethynyl)oligothiophene and bis(ferrocenylethynyl)oligothiophene complexes have been prepared. The cyclic voltammograms of the complexes all contain a reversible ferrocene oxidation wave and an irreversible oligothiophene-based wave. The potential difference between the two waves (Δ E ) varies from 0.38 to 1.12 V, depending on the length and substitution of the oligothiophene group. Several of the mono(ferrocenylethynyl)oligothiophene complexes couple when oxidized, resulting in the deposition of a redox-active film on the electrode surface. In solution, electrochemical oxidation of the Fe II centers yields the corresponding monocations and dications, which exhibit oligothiophene-to-Fe III charge-transfer transitions in the near-IR region. The band maxima of these low-energy transitions correlate linearly with Δ E, while the oscillator strengths show a linear correlation with negative slope with Δ E . The complexes with similar charge-transfer transition dipole lengths show an increase in the extent of charge delocalization with smaller Δ E . Comparisons between complexes with different length oligothiophene ligands show that a reduction in Δ E results either in greater delocalization of charge or in charge being delocalized further along the rigid oligothiophene ligand. These results have important implications in understanding charge delocalization in metal-containing polymers.
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Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it