Three-coordinate organoboron with a BN bond: substituent effects, luminescence/electroluminescence and reactions with fluoride
Bibliographic record
Abstract
Five new three-coordinate boron compounds with a B=N bond involving an indole or a substituted indole ligand including B(mesityl)2(indolyl), (1), B(mesityl)2(2-Me-indolyl), (2), B(mesityl)2(3-Me-indolyl), (3), B(mesityl)2 (7-Me-indolyl), (4), and B(mesityl)2(3-Ph-indolyl), (5) have been synthesized. The structures of these new compounds were determined by X-ray diffraction analyses. All five compounds are luminescent involving a charge transfer transition between the indolyl pi orbital and the boron p(pi) orbital. The substituent group on the indolyl ring was found to have a subtle impact on the electronic properties of compounds. NMR experiments established that the methyl group at the 7-position of indole is most effective in blocking the rotation of the mesityl group around the B-C bond. The addition of fluoride ions to this group of compounds causes luminescent quenching and an irreversible decomposition of the compounds due to the reaction of the F- adduct with water molecules. The potential use of this group of compounds as blue emitters in electroluminescent (EL) devices was demonstrated by the successful fabrication of a four-layer EL device where 1 was used as the emitter. The EL device displays a blue emission with a maximum luminescence being 1037 cd m(-2) and a maximum current efficiency about 0.7 cd A(-1) at 5 V.
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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 | 0.001 |
| 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".