4-(<i>N</i>,<i>N</i>-Dimethylamino)pyridine-Protected Au Nanoparticles: Versatile Precursors for Water- and Organic-Soluble Gold Nanoparticles
Why this work is in the frame
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Bibliographic record
Abstract
Ligand-exchange reactions of 4-( N, N -dimethylamino)pyridine-capped gold nanoparticles (DMAP−Au NP) with functionalized thiols (RSH) were investigated. A simple, convenient, and facile synthesis method has been developed. An important feature of this method is its requirement of only very modest quantities of excess thiol ligand. DMAP−Au NP prove to be versatile precursors for both water- and organic-soluble gold NP. DMAP is readily displaced by various functionalized thiols ranging from mercaptocarboxylic acids to ferrocene-terminated thiols. UV−vis spectroscopy and transmission electron microscopy (TEM) confirm that the mean diameter and the size dispersity of the initial DMAP−Au NP were retained upon ligand exchange. The RS−Au NP thus prepared were efficiently purified by gel permeation chromatography (GPC) with neither residual DMAP nor RSH detected in the final product.
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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 | 0.000 | 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 it