Preparation of Amine‐ and Disulfide‐Containing PAMAM‐Based Dendrons for the Functionalization of Hydroxylated Surfaces: XPS as Structural Sensor
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Bibliographic record
Abstract
Abstract Herein, we report the synthesis of novel poly(amido amine) [PAMAM]‐based dendrons with external amine and disulfide functional groups and an alkoxysilane moiety as the focal point. Four generations ( G1 ‐ G4 ) of dendrons were obtained by combining Michael addition and amidation reactions using (3‐aminopropyl) trimethoxysilane as the starting core; disulfide bridges and amine groups were introduced in the last step by ester amidation with cystamine and ethylendiamine. The resulting dendrons were characterized by Thermogravimetric Analysis (TGA), Fourier Transform Infrared (FTIR), Raman, Atomic Force Microscopy (AFM), Dynamic Light Scattering (DLS) and Z‐potential techniques. The growth of the dendrons was monitored by analysing the X‐ray Photoelectron Spectroscopy (XPS) high resolution spectra of the Si 2p, N 1s, C 1s, O 1s and S 2p signals for each dendron generation. The results evidence that it is possible to record, with good confidence, the compositional and structural changes that occur during the preparative route by means of XPS technique.
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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 | 0.000 | 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 | 0.000 |
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