Near-Edge X-ray Absorption Fine Structure Spectroscopy Study of the Photolytic Process in Poly(phenyl thioether) with Pendant Iron Moieties
Bibliographic record
Abstract
The near-edge X-ray absorption fine structure (NEXAFS) spectra of poly(phenyl thioether) polymers with pendant Fe(Cp) iron moieties have been recorded at the carbon 1s, iron 2p, and phosphorus 1s and 2p edges. This study shows that solution photofragmentation of the organometallic polymer causes the removal of iron moieties and the preparation of the corresponding organic polymer: poly(phenyl thioether). Spectroscopic characterization of poly(phenyl thioether) prepared in this manner indicates the presence of iron oxide, likely Fe 2 O 3, and hexafluorophosphate counterion trapped in the demetalated polymer matrix. A photolytic examination of the solid phase poly(phenyl thioether)−Fe(Cp) organometallic polymer shows that irradiation of this polymer in air leads to the formation of poly(phenyl thioether) and Fe 2 O 3, while irradiation in vacuum leads to formation of iron species with a lower oxidation state. The ability to probe the oxidation state of this metal species is relevant to understanding how demetalation conditions affect the properties of the polymer.
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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".