Microscopic Organization of Long-Chain Rhodamine Molecules in Monolayers at the Air/Water Interface
Bibliographic record
Abstract
The monolayer behavior of a rhodamine derivative with two C 18 aliphatic chains attached to the nitrogen atoms of the xanthene ring system (RhC 18 ) was studied by epifluorescence microscopy, second-harmonic generation (SHG), and absorption and fluorescence spectroscopy. The isotherm of RhC 18 exhibits a plateau which, presumably, corresponds to a slow collapse of the monolayer. As observed by epifluorescence microscopy, the RhC 18 monolayer remained homogeneous for a large range of molecular areas, and an abrupt change in the monolayer morphology occurred at the end of the surface pressure isotherm. Spectroscopic data showed that both fluorescent J-aggregates and nonfluorescent H-aggregates with a coplanar-inclined configuration were formed within the RhC 18 monolayer upon compression. The orientational SHG measurements revealed that, in the expanded region of the isotherm, the RhC 18 chromophore was oriented in a way where its xanthene plane made an angle of 36° with respect to the interface. The azimuthal angle SHG measurements revealed that compression induced an anisotropic arrangement of the S 0 − S 1 transition moment of RhC 18 chromophores perpendicular to the compression direction. At the end of the isotherm prior to and after the collapse point, the film possessed a fairly regular structure characterized by a C 2 v symmetry packing and a long-range order in the parallel alignment of the RhC 18 chromophores. Microscopic organization of the RhC 18 molecules in monolayers is discussed.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
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) | 0.001 | 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 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".