Optical Properties of a Two-Photon Chromophore in a Polymeric Nanostructure
Bibliographic record
Abstract
Optical properties of a cationic two-photon absorption (TPA) chromophore, 1,4-bis{4′-[N,N-bis(6″-trimethylammoniumhexyl)amino]styryl}benzene tetrabromide (C1) upon complexation with an anionic diblock copolymer, poly[(ethylene oxide)-block-(sodium 2-acrylamido-2-methyl-1-propane sulfonate)] (Em -An ) and a cationic surfactant, cetyltrimethylammonium bromide (CTAB) have been studied. Electrostatic interaction among C1, cationic CTAB and anionic (Em -An ) forms a vesicular polymeric nanostructure (containing C1 in a core), which is soluble in water. Incorporation of C1 into the nonpolar microenvironment inside the nanostructure successfully modulated its optical properties in aqueous medium. In water, fluorescence quantum yield (η) of C1 (0.32) was increased up to 0.55 accompanied with 30∼40 nm PL photoluminescence (PL) spectral shifts by forming the self-assembled nanostructure. This vesicular nanostructure may have a potential application as a two-photon molecular tag for biological imaging by two-photon microscopy.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| 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) | 0.001 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), 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".