Supercooled Liquid Vapor Pressures of the Polycyclic Aromatic Hydrocarbons
Why this work is in the frame
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Bibliographic record
Abstract
The vapor pressure of the supercooled liquid ( P L ) for 35 unsubstituted and alkylated polycyclic aromatic hydrocarbons (PAHs) was determined as a function of temperature using a gas chromatographic retention time technique. Pyrene and 1,2-benzanthracene, two compounds with well-established temperature-dependent vapor pressures, served as standard reference compounds. The method was calibrated with nine PAHs for which the vapor pressures at 25 °C are known from measurements relying on gas saturation and gas effusion techniques. Enthalpies of vaporization Δ vap H were also determined. The P L data were evaluated by comparison with several sets of published data and found to be reliable. For most of the investigated PAHs, a strong linear relationship between log P L and molecular mass exists, ranging over more than 9 orders of magnitude. However, PAHs with bulky substituents, such as phenyl- and tert -butyl-groups, have a higher vapor pressure than would be expected on the basis of molecular mass, presumably because of the lack of molecular planarity.
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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 | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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