Moderating the Reactivity of Living Anionic Poly(ferrocenyldimethylsilane) with a Diphenylethylene Chain End: Synthesis and Characterization of Polystyrene−Polyferrocenylsilane Graft Copolymers
Bibliographic record
Abstract
The synthesis and characterization of poly(styrene- g -ferrocenyldimethylsilane), the first organic−organometallic graft copolymer, are reported. This was permitted by the discovery that 1,1-diphenylethylene (DPE) can effectively cap the living anionic polyferrocenylsilane generated by the ring-opening polymerization (ROP) of the dimethyl-substituted [1]ferrocenophane 1 using n -BuLi as the initiator. The resultant living DPE-capped polymer was then reacted with the chloromethyl functionalities of poly(styrene- co -chloromethylstyrene) (PS- co -PCMS) ( 3 ) to afford the polystyrene−polyferrocenylsilane graft copolymers 5a and 5b . These graft copolymers were then analyzed using differential scanning calorimetry and wide-angle X-ray scattering which indicated that the materials are essentially amorphous, with at most a very low degree of crystallinity. Cyclic voltammetry of 5b in CH 2 Cl 2 showed a well-resolved wave voltammogram with a redox coupling Δ E of ca. 0.23 V, characteristic of the presence of significant Fe- - -Fe interactions in the grafted organometallic side chains. Polymer 5b was also characterized by thermogravimetric analysis which indicated that the material is thermally stable to weight loss up to ca. 300 °C.
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How this classification was reachedexpand
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) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".