Nonlinear Dynamical Behavior in the Photodecomposition of<i>N</i>-Bromo-1,4-Benzoquinone-4-Imine
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Bibliographic record
Abstract
Photodecomposition of N-bromo-1,4-benzoquinone-4-imine in water with and without the presence of oxidants was investigated, exhibiting nonlinear kinetic features such as autocatalytic excursion. An acidic environment was found to be essential for the observed photodecomposition. Mechanistic studies through NMR and mass spectrometry show the conversion of N-bromo-1,4-benzoquinone-4-imine into 1,4-benzoquinone. When bromate was introduced to the studied system, transient spontaneous oscillations were uncovered, forming a new photocontrolled chemical oscillator. The system's sensitivity to the intensity of the illumination is great as decreases halt the oscillations from occurring. Phase diagrams show that as the concentration of N-bromo-1,4-benzoquinone-4-imine is increased, broader concentration ranges of both bromate and sulfuric acid allow the system to exhibit spontaneous oscillations. Electrospray-TOF mass spectroscopy and (13)C NMR spectra suggest that 3,4,4-tribromo-2-hydroxycyclohexa-2,5-dienone is a major product in the bromate system.
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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 |
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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