Synthesis of Meth(acrylate) Diblock Copolymers Bearing a Fluorescent Dye at the Junction Using A Hydroxyl-Protected Initiator and the Combination of Anionic Polymerization and Controlled Radical Polymerization
Bibliographic record
Abstract
The synthesis of well-defined poly(methyl methacrylate)- b -poly(alkyl acrylate) diblock copolymers with a single fluorescent dye molecule (phenanthrene or anthracene) at the junction was investigated. The first block was prepared by the anionic polymerization (AP) of (meth)acrylate in THF at −78 °C, using the 3-( tert -butyldimethylsilyloxy)-1-propryllithium/1-aryl-1-phenylethylene (aryl = 2-phenanthryl or 2-anthryl) monoadduct as the initiator. After the end group of the first block was transformed into α-bromoester, the diblock copolymer was formed by the atom transfer radical polymerization (ATRP) of the second methacrylate monomer using the first block as the initiator. The block copolymers were characterized by GPC, UV, and NMR. We found that the synthesis of anthracene-labeled diblock copolymer was perturbed by the reaction of the propagating poly(alkyl acrylate) radical with anthracene. Consequently, this synthesis has to start from the anionic polymerization of tert -butyl acrylate, followed by chain extension to poly(methyl methacrylate) by ATRP.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.001 |
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 source (direct Gemma or distilled Codex), 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".