Amphiphilic TEMPO-Functionalized Block Copolymers: Synthesis, Self-Assembly and Redox-Responsive Disassembly Behavior, and Potential Application in Triggered Drug Delivery
Why this work is in the frame
A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.
Bibliographic record
Abstract
A novel range of amphiphilic redox-responsive 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO)-functionalized diblock copolymers poly(ethylene glycol)-b-poly(2,2,6,6-tetramethylpiperidine-1-oxyl-4-yl methacrylate-co-N-isopropylacrylamide [PEG-b-P(TMA-co-NIPAM)] have been synthesized in this work via reversible addition–fragmentation chain transfer (RAFT) polymerization followed with functionality transformation. With the possession of the hydrophilic PEG block and the hydrophobic TEMPO-containing block, these amphiphilic diblock polymers can conveniently self-assemble to form stable uniformly sized radical-containing nanoparticles (RNPs), which can thus act as nanovessels to carry drugs. More interestingly, the self-assembled RNPs exhibit the unique reduction-responsive disassembly upon addition of vitamin C (VC) as a representative reducing agent due to the drastic drop in the surface hydrophobicity following reduction of the TEMPO units. In the proof-of-concept experiments, the VC-triggered release of the encapsulated R6G dye as the model payload from the RNPs at controllable rates has been successfully demonstrated. Meanwhile, the cytotoxicity study with CCK-8 assay confirms the TEMPO-containing block copolymers and their reduced ones are nontoxic at a concentration up to 500 μg mL–1. This series of amphiphilic diblock copolymers is thus highly promising for potential application in triggered drug delivery.
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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 | 0.001 |
| 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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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