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 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) | 0.001 | 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".