Preparation and characterization of organic-inorganic hybrid materials incorporating diphosphino moieties. Study of the accessibility of the phosphorus atoms included into the material
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Bibliographic record
Abstract
The hydrolysis-polycondensation by the sol-gel process of the aromatic diphosphines (X 3 SiC 6 H 4 ) 2 PC 6 H 4 P(C 6 H 4 SiX 3 ) 2 , which are rigid molecules bearing four hydrolysable SiX 3 groups (X = O i Pr, H), leads to new organic-inorganic hybrid materials, characterized by solid state 13 C, 29 Si, and 31 P NMR spectroscopies. The accessibility of the phosphorus centres incorporated into the xerogel obtained from the diphosphine with X = O i Pr has been studied. All the phosphorus atoms reacted quantitatively with H 2 O 2 , S 8 , and CH 3 I but only 20% with the more bulky reagent W(CO) 5 ·THF. This result is explained by the rigidity of the inorganic network resulting from the high number of hydrolysable Si-O i Pr groups in the precursor.Key words : Diphosphines, sol-gel process, xerogels, solid 31 P NMR.
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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 | 0.001 | 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) | 0.001 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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