Platinum Complexes of <i>N</i>,<i>N</i>′,<i>N</i>″,<i>N</i>‴-Diboronazophenines
Bibliographic record
Abstract
Azophenine, (α-C 6 H 5 NH) 2 (C 6 H 5 –N═C 6 H 2 ═N–C 6 H 5 ), well known to be non-emissive, was rigidified by replacing two amine protons by two difluoroboranes (BF 2 + ) and further functionalized at the para -positions of the phenyl groups by luminescent trans -ArC≡C–Pt(PR 3 ) 2 -C≡C ( [Pt] ) arms [Ar = C 6 H 4 (R = Et), hexa( n -hexyl)truxene) ( Tru; R = Bu)]. Two effects are reported. First, the linking of these [Pt] arms with the central azophenine (C 6 H 4 –N═C 6 H 2 (NH) 2 ═N–C 6 H 4; Q ) generates very low energy charge-transfer (CT) singlet and triplet excited states ( 3,1 ( [Pt] -to- Q )*) with absorption bands extending all the way to 800 nm. Second, the rigidification of azophenine by the incorporation of BF 2 + units renders the low-lying CT singlet state clearly emissive at 298 and 77 K in the near-IR region. DFT computations place the triplet emission in the 1200–1400 nm range, but no phosphorescence was detected. The photophysical properties are investigated, and circumstantial evidence for slow triplet energy transfers, 3 Tru * → Q, is provided.
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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) | 0.000 | 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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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".