Investigating the Degradability and Optoelectronic Properties of π-Conjugated Polymers with 1,2,4-Chalcogenadiazole Linkers
Bibliographic record
Abstract
As the world is now facing the inevitability of forever plastics, all new high-performance polymers require careful design. Building on our previous work on the degradable 1,2,4-oxadiazole linker for conjugated polymers, we investigate the effects of chalcogen substitution in the linker on the optoelectronic and degradation properties of the π-conjugated polymers. Small molecule models were used to demonstrate the photodegradation of the linkers in the presence of methanol. The syntheses of polymers containing 1,2,4-thiadiazole and 1,2,4-selenadiazole linkers by direct heteroarylation polymerization are reported. As heavier chalcogen atoms are substituted into the 1,2,4-chalcogenadiazole linker, the optical HOMO–LUMO gap becomes smaller. This effect is due to the stabilization of the HOMO and destabilization of the LUMO as heavier chalcogen atoms are substituted. The polymers incorporating the 1,2,4-oxadiazole and 1,2,4-thiadiazole linkers show evidence of photodegradation by 1 H NMR and gel permeation chromatography.
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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) | 0.000 | 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 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".