Donor–Acceptor Intermediates and Low-Bandgap Polymers by Electropolymerization of Thienoazaborines
Bibliographic record
Abstract
New low-bandgap polythiophenes ( E g ∼ 1.2 eV) with thienoquinodiimine and diphenylbithiophene alternating moieties were synthesized via electrochemical polymerization of azaborines 1a and 1b . The polymers were investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV), vis–NIR spectroelectrochemistry, and X-ray photoelectron spectroscopy (XPS). Formation of these polymers is accompanied by boron expulsion from the fused dithienoazaborine system and formation of a new C–C bonds between thiophene backbone and phenyl substituents. This finding was supported by isolating the intermediates 2 and 3 with partially deborylated structures. The optoelectronic properties of the later, investigated by UV–vis spectroscopy and CV, are controlled by the interaction between the donor (amino-substituted thiophene) and acceptor (thienoazaborine) moieties which is weak in the ground state due to twisted structure of the molecule but is enhanced in the excited state leading to large fluorescence Stokes shift.
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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) | 0.001 | 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 | 0.001 |
| 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".