Stabilization of the (<i>E</i>)-1-Ferrocenyl-2-(1-methyl-4-pyridinium)ethylene Cation by Inclusion in Cucurbit[7]uril
Why this work is in the frame
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Bibliographic record
Abstract
The ( E )-1-ferrocenyl-2-(1-methyl-4-pyridinium)ethylene cation, ( E )-FcMPE +, forms a very stable guest−host complex ( K CB7 = (1.3 ± 0.5) × 10 12 M - 1 ) in aqueous solution with cucurbit[7]uril (CB[7]). The 1 H NMR, ES-MS, and UV−visible spectra are consistent with 1:1 {( E )-FcMPE·CB[7]} + species formation, in which the CB[7] encapsulates the ferrocenylethylene portion of the guest. The reduction potential of the ( E )-FcMPE 2+/+ couple increases slightly (+0.03 V) in the presence of CB[7], while the rate constant for the oxidation of ( E )-FcMPE + by Co(dipic) 2 - (dipic 2 - = 2,6-pyridinedicarboxylate) decreases significantly. UV−visible spectra of ( E )-FcMPE + in the absence and in the presence of CB[7] during photoirradiation demonstrate that the photoisomerization to ( Z )-FcMPE + is fully inhibited and photostabilization of ( E )-FcMPE + is dramatically enhanced upon inclusion in CB[7].
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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 | 0.001 | 0.001 |
| 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 it