Solvatochromic Properties of 2,7-Carbazole-Based Conjugated Polymers
Bibliographic record
Abstract
The solvatochromic properties of poly( N -alkyl-2,7-carbazolediyl)s, poly( N -alkyl-2,7-carbazolediyl- alt -2,5-thiophene)s, poly( N -alkyl-2,7-carbazolediyl- alt -2,5-furan)s, and poly( N -octyl-2,7-carbazoleneethynylene) have been investigated experimentally and theoretically. All polymers have revealed solvatochromic effects, which have been interpreted in terms of the formation of H- and/or J-aggregates. It was observed that the optical properties of the polymers are strongly dependent on the rotational barriers between the subunits present in the polymers. For instance, poly( N -alkyl-2,7-carbazolediyl)s, which possess a relatively high barrier to rotation between adjacent carbazole units, shows a very weak H-band and an intense J-band. On the other hand, poly( N -alkyl-2,7-carbazolediyl- alt -2,5-thiophene)s and poly( N -alkyl-2,7-carbazolediyl- alt -2,5-furan)s, which can reach planarity upon aggregation (low values of torsional barriers), exhibit more intense H-bands. It was also observed that the presence of branched alkyl chains on the nitrogen atom of the carbazole units does not significantly affect the optical properties of the polymers.
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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".