Ag<sub>20</sub> Nanoclusters with Surface Azides as an Easily Functionalized Platform for Diverse Chemical Applications
Bibliographic record
Abstract
Abstract Modifying atomically precise nanocluster surfaces while maintaining the cluster core remains a key challenge. Herein, the synthesis, structure, and properties of two targeted Ag 20 nanoclusters (NCs) with eight surface azide moieties, [CO 3 @Ag 20 (S t Bu) 10 ( m ‐N 3 ‐C 6 H 4 COO) 8 (DMF) 4 ] ( 1 ‐m ) and [CO 3 @Ag 20 (S t Bu) 10 ( p ‐N 3 ‐C 6 H 4 COO) 8 (DMF) 4 ] ( 1 ‐p ) are reported, where DMF is N,N ‐dimethylformamide. These AgNCs are designed to undergo cluster surface strain‐promoted azide‐alkyne cycloaddition (CS‐SPAAC) reactions, introducing new functionality to the cluster surface. Reactivity is screened using model strained cyclooctynes. Reaction products and parent clusters are characterized by UV–vis, FT‐IR, and NMR spectroscopies. The structure of the parent clusters and presence of surface azides is confirmed by single crystal X‐ray diffraction (SCXRD) analysis. Clusters 1 ‐m and 1 ‐p are found to be amenable to CS‐SPAAC reactions with retention of the NC frameworks, opening new routes for efficient modification of AgNC for applications.
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How this classification was reachedexpand
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 | 0.000 | 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) | 0.000 | 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 teacher head, 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".