Fluorescent Self-Supporting Composite Film Formed from Chitosan and the Neutral Poly(3-hexylthiophene-<i>co</i>-1,4-phenylene) Polymer with Enhanced Dispersion Properties for a Small Molecule
Bibliographic record
Abstract
-1,4-phenylene) (PTPh), was developed to combine the adsorption capacity of Ch with the fluorescence sensitivity of PTPh. Characterization of the films using thermogravimetric analysis, microscopy, and infrared, absorption, and fluorescence spectroscopies revealed that the dispersity of the target small molecule, 4-aminoazobenzene (4-AAB), was improved in the composite film compared to the pristine Ch film as evidenced in microscopy studies. In the presence of 4-AAB, the Ch/PTPh film exhibited fluorescence quenching at low 4-AAB concentrations and changes in emission spectra at higher concentrations. Photoisomerization studies suggested that the improved dispersity of 4-AAB in the composite film is due to an increase in the free volume provided by PTPh, with faster cis-to-trans isomerization observed when PTPh was present. Proof-of-concept adsorption experiments showed that the composite film adsorbed 4-AAB from an aqueous solution, leading to a change in the emission properties of the film. This qualitative characterization uncovered a dual role for the conjugated polymer in the composite film: the addition of the polymer changed the morphology and robustness of the film, and the polymer also provides the fluorophore to sense adsorbed molecules over a wide range of 4-AAB concentrations. These results show that the strategy of incorporating water-insoluble polymers at low concentrations into a versatile biopolymer leads to enhanced functionalities of a composite material.
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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 | 0.001 | 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".