Molecular Spectra and Molecular Organization in Thin Solid Films of Bis(Neopentylimido) Perylene
Why this work is in the frame
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Bibliographic record
Abstract
The synthesis, molecular spectra, and thin solid film properties of a perylene dye, bis(neopentylimido) perylene (BNPTCD),§ are reported. Absorption and emission molecular spectra are used to probe the structure of vacuum-evaporated thin films and Langmuir–Blodgett monolayers of BNPTCD. The experimental assignment of electronic, infrared, and Raman spectra are aided with calculated molecular structure and spectra using density functional theory (DFT) and Hartree–Fock (HF) computational methods at 6–31G level of theory. Characteristic vibrational modes and local symmetry of the planar perylene tetracarboxylic chromophore (PTCD) are used to extract molecular organization and film packing properties from spectral data collected using transmission and reflection-absorption (RAIRS) infrared spectroscopy. From the infrared spectra, using surface selection rules and polarization properties, it was extracted that the PTCD plane in BNPTCD is organized in the evaporated film with the plane head-on tilted over the substrate. After the molecular organization was identified, the effect of thermal annealing and solvent vapors on the film structure was examined. It is found that the PTCD plane turns to a flat-on orientation when the film is thermal annealed or solvent treated. The aggregation and molecular stacking in films was also inspected using the electronic absorption and fluorescence of monomers and aggregates.
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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 | 0.000 | 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