Visible Light-Mediated Photoclick Functionalization of a Conjugated Polymer Backbone
Bibliographic record
Abstract
Efficient postpolymerization functionalization of conjugated polymer backbones is generally challenging. Here, we report the first example of a conjugated polymer backbone that can be functionalized using visible light. This polymer contains a 9,10-phenanthrenequinone moiety in the conjugated backbone, which reacts with electron-rich vinyl ethers via visible light-mediated photoclick chemistry. Synthesis of the 9,10-phenanthrenequinone dibromide monomer requires only a single step from commercially available precursors, and the corresponding polymer can be prepared by Suzuki polycondensation. The photoclick reaction was found to be extremely fast, requiring only a few minutes of irradiation using a commercially available aquarium light-emitting diode. It is also insensitive to air and moisture and requires no additional catalysts. The resulting photoclick conjugates were characterized using NMR, UV–vis, fluorescence, and IR spectroscopy. Photoclick coupling to polyethylene glycol vinyl ether produced a dramatic change in polymer solubility and emission properties, while maintaining an identical degree of polymerization and dispersity of the polymer backbone. We demonstrate the first instance of a photopatternable conjugated polymer backbone by incorporating the conjugated polymer into a silicone elastomer and functionalizing it in a spatially resolved manner.
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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) | 0.000 | 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 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".