Mechanism of Reaction and Photoacid Generation of 1,2-di(Arylsulfonyl)hydrazine PAGs: A Laser Flash Photolytic Study
Bibliographic record
Abstract
The photochemical behavior of four 1,2-di(arylsulfonyl)hydrazine photoacid generators has been studied by means of nanosecond laser flash photolysis (λ = 266 nm) and steady-state photolysis (λ = 254 nm) with the aim of understanding the reactions involved in photoacid generation. Upon photoexcitation, homolytic cleavage of the S−N bond results in the formation of arylsulfonyl radicals. The nitrogen-centered radical that also results from this cleavage decomposes to yield another arylsulfonyl radical. The arylsulfonyl radical generates acid via reaction with oxygen to yield a peroxysulfonyl radical, which subsequently reacts with a hydrogen donor to yield a peroxysulfonic acid. The sulfonic acids detected in product studies are presumed to be the stable decomposition products of these peroxysulfonic acids. Desulfonylation of the arylsulfonyl radical to generate SO 2 is a very minor pathway that occurs in competition with acid generation. Photoacid generation quantum yields upon laser excitation were found to range from 0.05 to 0.1.
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How this classification was reachedexpand
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) | 0.001 | 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 teacher head, 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".