The synthesis of novel salicylaldehyde imine derivatives containing pyridinium and selective detection for fluoride and cyanide in organic-aqueous media
Bibliographic record
Abstract
Two new colorimetric receptors 1 and 2 nitrophenyl as signaling units and imine moieties as binding sites, were synthesized via a simple condensation reaction and characterized by 1H NMR, 13C NMR, FTIR and HRMS. The colorimetric sensing properties of the receptors toward various anions were studied using naked eye detection, UV-vis spectroscopy and 1H NMR titration. The results show that receptors 1 and 2 exhibit good UV-Vis recognition capabilities for F−, Ac− and CN−, and can recognize CN− with the naked-eye in a H2O/DMSO (3:7, V/V) solution. The detection limit for CN⁻ recognition by receptors 1 and 2 was as low as 1.31 μmol, and we prepared test papers for detecting anions using these receptors. The Job's plot analysis demonstrates a 1:1 stoichiometric binding ratio between F− and the receptors. The recognition mechanism of CN− was inferred using UV-vis and 1H NMR titrations, HRMS and theoretical calculations. Such stripes can serve as a practicable colorimetric probe for the detection of ions in many fields and avoid more expensive equipment.
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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 | 0.002 |
| 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 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".