Zinc Coordination of Carboxylate Surfactomesogens to Poly(4-vinylpyridine)
Bibliographic record
Abstract
Zinc salts of carboxylic acid-functionalized alkoxybiphenyl mesogens (also termed surfactomesogens), HO 2 C(CH 2 ) n - 1 PhPhOCH 3, n = 6 and 11, Ph = phenyl, were melt-blended with poly(4-vinylpyridine), mainly at a mesogen/(vinylpyridine) molar ratio of 0.5, and studied by infrared spectroscopy, differential scanning calorimetry, polarizing optical microscopy, and X-ray diffraction. Melt-blending results in complexation between the two components via zinc coordination (at the same maximal level for n = 6 and 11), and the complexes obtained are temporally stable at ambient temperature. The complex with n = 6 appears to be simply amorphous, with some excess surfactomesogen in crystalline form. In contrast, the complex with n = 11 is mesomorphic, structurally organized as a single-layer smectic A phase at ambient temperature, with no crystallization of excess surfactomesogen. It is concluded that a spacer length of 6 is not sufficient to decouple the biphenyl core from the coordination site so as to permit liquid crystal ordering, whereas this is possible for a spacer length of 11. At temperatures above 100 °C, decomplexation accompanied by crystallization of most of the surfactomesogen occurs in both systems (with complexation obtained again above the melting point). These complexes are the first examples in the literature, to our knowledge, of metal-coordinated comblike polymers involving surfactomesogens (as opposed to simple surfactants) and show the interest of this metallosupramolecular approach for the conception of novel side-chain liquid crystal polymers.
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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 | 0.000 | 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".