Solvent and Steric Influences on Rotational Dynamics in Porphyrinic Metal–Organic Frameworks with Mechanically Interlocked Pillars
Why this work is in the frame
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Bibliographic record
Abstract
Zinc(II) metal–organic framework (MOF) materials were prepared using a porphyrin-based tetracarboxylate linker and pyridine-terminated [2]rotaxane linkers as pillars. Two pillaring rotaxanes (R = H or CH3 at pyridine 2-position) were used to create two MOFs α-UWDM-6 and α-UWDM-7, and their structures were determined by single-crystal X-ray diffraction. Both MOFs undergo reversible phase transitions upon solvent removal to generate γ-UWDM-6 and β-UWDM-7. The dynamics of the 24-membered macrocycle ([24]crown-6) inside each MOF phase was studied using variable-temperature 2H solid-state NMR spectroscopy. Interestingly, only solvated α-UWDM-7 demonstrates unrestricted rotation of the macrocycle inside the MOF pores; studies on α-UWDM-7 with various solvents showed that the dynamics of the wheel is essentially independent of the solvent.
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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 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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