Polymorphism in New Thienothiophene–Thiazolothiazole Organic Semiconductors
Bibliographic record
Abstract
Charge transport in organic semiconductors is heavily influenced by their solid-state packing. To separate intermolecular packing effects from molecular electronic effects, we have synthesized two polymorphs of crystalline thienothiophene-thiazolothiazole trimers and studied them by DFT calculations, optical spectroscopy, single-crystal X-ray diffraction and charge-transport measurements in field-effect transistors. One polymorph was found to be a p-type semiconductor with a hole mobility of 3.3×10(-3) cm(2) V(-1) s(-1) , while the other was insulating. The different charge-transport behavior and optical properties of the two polymorphs are strongly related to the topology of their π-stacks. Subtle differences between the polymorphs, including S⋅⋅⋅S close contacts and bond-length alternation are also discussed for their possible effects on charge transport.
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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 | 0.001 |
| 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 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".