Radical and Redox Forms of Pyridyl Appended MB‐DIPYs
Bibliographic record
Abstract
Abstract We discuss the synthesis and properties of pyridine‐appended nickel(II) complex of “Manitoba dipyrromethene” (Ni II (MB‐DIPY)), which is stable radical at ambient conditions. The Ni II (MB‐DIPY), 6 • shows absorption at ∼1300 nm and a g‐value of ∼2.00 in EPR. The redox features of Ni II (MB‐DIPY) were studied by electro‐ and spectroelectrochemistry. The reduced form, 6 ‐ , has an intense NIR absorption and a broad spectrum in the visible region, making this compound a prospective non‐fullerene acceptor for light‐harvesting. The axial coordination and photophysical properties of the supramolecular dyad formed between pyridine‐appended Ni II (MB‐DIPY) with zinc 5,10,15,20‐tetrakis‐(pentafluorophenyl)porphyrin (TPP F20 Zn) were also studied. Ni II (MB‐DIPY) 6 • failed to interact with TPP F20 Zn. However, reduced Ni II (MB‐DIPY) in its anionic form, 6 ‐ , self‐assembles and forms a donor‐acceptor dyad with TPP F20 Zn with a binding constant of K a = 1.13 × 10 2 M −1 and fluorescence quenching constant of K SV = 1.31 × 10 3 M −1 . This work represents the first report on the potential of MB‐DIPYs to self‐assemble and form a donor‐acceptor type supramolecular dyad with TPP F20 Zn. This study explored the potential of the MB‐DIPYs to act as a non‐fullerene acceptor in light‐harvesting supramolecular donor‐acceptor systems formed via non‐covalent interactions.
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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 | 0.000 |
| 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 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".