Effective Alkoxylation of Phosphorescent Heteroleptic Iridium(III) Compounds Bearing Fluorinated Bipyridine Ligands
Bibliographic record
Abstract
Facile one-pot synthetic methods for new alkoxo-functionalized heteroleptic cyclometalated Ir(III) compounds have been developed. Nucleophilic substitution of fluorine atoms in [(dfpypy) 2 Ir(μ-Cl)] 2 (dfpypy = 2′,6′-difluoro-2,3′-bipyridine) by a methoxyethanol in the presence of an ancillary ligand led to the formation of the new alkoxo-functionalized heteroleptic Ir(III) compounds Ir[(RO) 2 pypy] 2 (N ∧ O) in good yields. These compounds have a distorted octahedral geometry around the Ir(III) center with an N,N-trans-meridional configuration. They exhibit intense blue to yellow phosphorescence (λ max = 453–558 nm) with moderate to excellent quautum efficiencies (0.22 to 0.96). Comparative studies on the fluoro analogues, Ir(dfpypy) 2 (N ∧ O), were also carried out. Our investigation established that the substitution of a fluorine atom by an alkoxy chain can greatly improve the solubility of the compounds in common organic solvents without significantly altering the emission color and efficiencies, making alkoxy-functionalized Ir(III) compounds potential candidates for use in solution-processable phosphorescence OLEDs.
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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 | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| 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".