Study on the optical and magnetic properties of C<sub>48</sub>N<sub>12</sub>azafullerene isomers
Bibliographic record
Abstract
The nonlinear optical properties, IR and Raman frequencies as well as NMR chemical shifts of two S6 symmetrical C48N12 azafullerene isomers (I and II conformations) were calculated and compared with those of C60 at the B3LYP/6-31G* level of density functional theory. The second order hyperpolarizabilities were determined by means of ZINDO/SOS. The static (hyper)polarizabilities of C48N12 are smaller than those of C60, whereas the DC-electric field induced second harmonic generation of II is 58% larger than that of C60 at the frequency of 1.1653 eV, suggesting that II is a potential NLO candidate. In contrast to I, all five of the most intense IR and Raman frequencies of II exceed 1000 cm−1. These differences, and those between the computed 13C NMR chemical shifts of I and II should be useful to distinguish and to identify these two structural isomers.
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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) | 0.002 | 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".