Investigation of<i>p</i>-Difluorobenzene and Fluorobenzene Adsorbed on Completely Siliceous Zeolite ZSM-5
Bibliographic record
Abstract
The host−guest interactions of two related sorbates, p -difluorobenzene and fluorobenzene, in completely siliceous zeolite ZSM-5 have been examined by thermogravimetric analysis, powder X-ray diffraction (XRD), and FT-Raman spectroscopy. The powder XRD patterns reveal that the phase transition behavior of p -difluorobenzene/ZSM-5 is very different from that of closely related p -dichlorobenzene/ZSM-5 and p -xylene/ZSM-5 systems. FT-Raman spectra of p -difluorobenzene adsorbed in ZSM-5 indicate that the first 4 p -difluorobenzene molecules are located in the channel intersections. When the loading is greater than 4 molecules per unit cell (uc), additional molecules access the midsections of straight channels. The situation is different from that found in p -dichlorobenzene/ZSM-5 and p -xylene/ZSM-5 complexes where additional guest molecules reside in the zigzag channels. Adsorption of fluorobenzene into ZSM-5 induces only one transition in the framework at a loading of 4 molecules/uc. This behavior is distinctly different from that of similar chlorobenzene/ZSM-5 systems in which two successive transitions occur at 3 and 7 molecules/uc.
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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".