Novel Blue Phosphorescent Group 15 Compounds MR<sub>3</sub> (M = P, Sb, Bi; R = <i>p</i>-(<i>N</i>-7-Azaindolyl)phenyl)
Bibliographic record
Abstract
New blue phosphorescent organometallic compounds of group 15, M[ p -C 6 H 4 ( N -7-azain)] 3 with M = P ( 1 ), Sb ( 2 ), Bi ( 3 ) and 7-azain = 7-azaindolyl, have been synthesized from the reaction of MCl 3 with Li[ p -C 6 H 4 ( N -7-azain)]. The crystal structures of these new compounds have been determined by single-crystal X-ray diffraction, which revealed that the group 15 elements in all three complexes are in a trigonal-pyramidal environment with the bond angles of C−M−C around the central atom decreasing from 1 to 3, attributed to the diminution of s character of the M−C bond and the size increase of the central atom. All three compounds are blue luminescent. Both fluorescent and phosphorescent emissions (λ max = 371 nm, λ max = 488 nm) were observed for compound 1 at 77 K. In contrast, at 77 K, only phosphorescence was observed for compounds 2 and 3 (λ max = 483 nm for 2; λ max = 478 nm for 3 ), attributable to the increased heavy-atom effects. Experimental data and molecular orbital calculations (restricted Hartree−Fock methods) support the view that luminescences from all three compounds are ligand-based emissions with contributions from the lone-pair electrons of the central atom. The orange Bi(V) compound Bi[ p -C 6 H 4 ( N -7-azain)] 3 Cl 2 ( 4 ) was obtained by the oxidation of 3 with PhI·Cl 2 . Compound 4 displays a distorted-trigonal-bipyramidal structure and a weak phosphorescence at λ max = 510 nm at 77 K, which is most likely caused by charge-transfer transitions from the chloride ligand to the Bi(V) center.
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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 | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.001 | 0.002 |
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; both teacher heads agree on what is shown here.
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".