Merocyanine-linked ZwitterIonic Covalent Organic Frameworks
Why this work is in the frame
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Bibliographic record
Abstract
Merocyanines are classic π-conjugated systems with a significant zwitterionic character and distinct optoelectronic properties. Here, we report the synthesis of the first merocyanine-based C=C-linked COFs through the condensation of N-alkylcollidinium salts with hydroxytrimesic aldehyde. These zwitter-ionic COFs are chemically stable, with a pronounced charge-transfer absorption band to ~850 nm. Strong dipolar interactions within the COFs result in pore contrac-tion/expansion in response to the medium polarity, manifested in a macroscopic expansion and an increased surface area in high dielectric constant medium. The COFs can reversibly transition between a black neutral and a yellow cationic form upon protonation. Density Functional Theory calculations suggest an ‘omni-directional’ π-conjugation with large band dispersions, despite the trigonal lattice. Thin films of EtMER-COF prepared by heterogeneous nucleation on glass/ITO substrates reveal a vertical orientation of its 2D sheets. Time-resolved spectroscopy of thin film suggests the presence of stimulated emission as well as a long-lived excited state.
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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 | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.003 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.002 | 0.001 |
| Research integrity | 0.002 | 0.002 |
| Insufficient payload (model declined to judge) | 0.032 | 0.008 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
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