Fluorinated Pyridine Aryl Ether Polymers with Defined Microstructures, Diverse Architectures, and Tunable Thermal Properties
Why this work is in the frame
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Bibliographic record
Abstract
By utilizing the unique regioselective nucleophilic aromatic substitution (SNAr) of pentafluoropyridine with bisphenols, a series of 4-substituted tetrafluoropyridine (TFP) aryl ether monomers were prepared in nearly quantitative yields from a facile, base-promoted methodology. Sequential regioselective SNAr of TFP monomers with bisphenols afforded linear amorphous, solution-processable fluorinated pyridine aryl ether polymers as well as networks. Room-temperature kinetic experiments using 19 F NMR revealed high-molecular-weight polymers with nearly quantitative conversions. By the nature of the bisphenol substitution and its electronic effects, the polymer microstructure was tuned for a broad range of glass transition temperatures for optically transparent materials. This work will provide insights into synthetic routes toward TFP monomers, step-growth polymerization kinetics, molecular weight determination, and thermal properties.
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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) | 0.001 | 0.000 |
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