Bibliographic record
Abstract
Since its discovery in 1867, the photodimerisation of anthracene has been one of the most exploited reactions for reversibly connecting materials at a molecular level. The cumbersome synthesis of many substituted anthracene derivatives combined with their tendency to form endoperodixes when irradiated in presence of oxygen and the short wavelengths needed to convert the dimer to its monomer prohibit their use in practical applications. In an attempt to circumvent some of these problems, we undertook the synthesis and the investigation of the photochemistry of benzo[2,3-g]quinoxalines, which are structurally similar to anthracenes. Surprisingly, the photochemical behaviour of these molecules has not been previously investigated. Upon irradiation, 2,3-diphenylbenzo[2,3-g]quinoxaline (DPBQ) and 2,3-di(2-dipyridyl)benzo[2,3-g]quinoxaline (DPyBQ) both underwent photodimerisation to yield di-DPBQ and di DPyBQ respectively. The head-to-tail structure of di-DPBQ was confirmed by X-ray crystallography. Preliminary studies suggested that the presence of ZnCl2 and Zn(OAc)2 reduced the yield of dimerisation of DPyBQ.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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".