Oxidizable coupling agents: Introduction of surface functionality
Bibliographic record
Abstract
The synthesis and grafting to glass or quartz of alkylalkoxysilane coupling agents (RSi(OR′) 3 ) that are susceptible/responsive to oxidation is described. Hydrosilylation of the inexpensive polyolefin squalene occurred efficiently once or twice with the silane HMe 2 SiOSiMe 2 (CH 2 ) 2 Si(OEt) 3 to give a silane coupling agent 3 that possesses several alkene groups. Once grafted to a silica surface Q-Sq using traditional means, the coupling agent was oxidized and further processed in several different ways. First, epoxidation using soluble peracids led to polyepoxides that could be further hydrolyzed to give polyalcohol surfaces Q-Sq-PAA-H 2 O . Alternatively, ozonolysis with gaseous O 3 led to the ozonides Q-Sq-O 3 , which could be decomposed to give either aldehyde/ketone Q-Sq-O 3 -redu , or ketone/carboxylic acid groups Q-Sq-O 3 -H 2 O 2 , respectively, bound to the surface. The aldehyde/ketone groups were characterized by condensation with dinitrophenylhydrazine to give the highly colored hydrazones Q-Sq-O 3 -redu-DNPH . These studies demonstrate the ready portability of organic chemistry to silica (or related) surfaces using judiciously chosen silane coupling agents and the possibility of controlling surface functionalization by postgrafting oxidation.
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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) | 0.001 | 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 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 0.001 |
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".