Synthesis and Self-Assembly of Fluorescent Micelles from Poly(ferrocenyldimethylsilane-<i>b</i>-2-vinylpyridine-<i>b</i>-2,5-di(2′-ethylhexyloxy)-1,4-phenylvinylene) Triblock Copolymer
Bibliographic record
Abstract
A fluorescent ABC triblock copolymer containing poly(ferrocenyldimethylsilane) (PFS) and poly(2-vinylpyridine) (P2VP) moieties in the segments was synthesized via living anionic polymerization followed by quenching the living chains using a π-conjugated poly(2,5-di(2′-ethylhexyloxy)-1,4-phenylvinylene aldehyde (PDEHPV-CHO) homopolymer. The resulting triblock copolymer poly(ferrocenyldimethylsilane- b -2-vinylpyridine- b -2,5-di(2′-ethylhexyloxy)-1,4-phenylvinylene) (PFS- b -P2VP- b -PDEHPV) underwent self-assembly in 2-propanol to form cylindrical micelles. 2-Propanol is a good solvent for P2VP, a modest solvent for PDEHPV, and a poor solvent for PFS. The cylindrical shape of the micelles is likely related to the semicrystalline nature of the PFS in the core. The PDEHPV block showed strong green-yellow fluorescence both for polymers dissolved as discrete molecules in tetrahydrofuran (THF), a good solvent for all three components, and as micelles in 2-propanol. The fluorescence quantum yields were 56% for the triblock copolymer in THF and ca. 17% for the micelles in 2-propanol. Because ferrocene units are powerful fluorescence quenching entities, we surmise that in both cases, the P2VP block acts as a spacer to minimize the quenching of PDEHPV fluorescence by the PFS block. Taking advantage of the fluorescence of the PDEHPV block, we were able to obtain images of the block copolymer micelles and their flower-like aggregates in 2-propanol solution by laser confocal fluorescence microscopy.
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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) | 0.001 | 0.001 |
| 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 | 0.001 | 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".