Stable Helical Assembly of Propellane-Based Polymers and Nanotube Composites
Bibliographic record
Abstract
The integration of chirality into organic semiconductors offers promising avenues for next-generation information storage and spintronic technologies. Chiral conjugated polymers, particularly polyfluorenes, have emerged as attractive candidates due to their favorable optoelectronic properties and potential to support phenomena such as circularly polarized luminescence (CPL), electrical magnetochiral anisotropy (eMChA), and chirality-induced spin selectivity (CISS). However, achieving robust and persistent chiral order in these systems remains challenging as their helical conformations are often sensitive to processing conditions, aggregation, and film morphology. Here, we report a series of chiral polyfluorene copolymers incorporating [4.3.3] propellane units that serve as rigid, three-dimensional scaffolds to stabilize supramolecular helicity. These propellane-functionalized polymers exhibit enhanced chiroptical responses in both solution and thin-film states, including amplified circular dichroism signals at reduced film thickness. Furthermore, we demonstrate that these materials form stable composites with single-walled carbon nanotubes, yielding well-dispersed and semiconducting carbon nanotube networks suitable for organic field-effect transistor (OFET) applications. Our findings present a molecular design strategy to improve chiral order and device integration in conjugated polymer systems, with implications for the future development of spintronic and optoelectronic devices.
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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".