Self-Assembly of Organometallic Block Copolymers: The Role of Crystallinity of the Core-Forming Polyferrocene Block in the Micellar Morphologies Formed by Poly(ferrocenylsilane-<i>b</i>-dimethylsiloxane) in <i>n</i>-Alkane Solvents
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Bibliographic record
Abstract
The organometallic−inorganic diblock copolymer poly(ferrocenyldimethylsilane- b -dimethylsiloxane) (PFDMS- b -PDMS) with a 1:6 block ratio unexpectedly forms long rodlike micelles rather than spherical structures in a variety of PDMS-selective n -alkane solvents when the solutions are prepared at or near ambient temperature. The cylindrical structures represent the thermodynamically preferred morphology and consist of an iron-rich PFDMS core and a corona of PDMS. The length of the micelles can be varied from 70 nm to 10 μm by altering the method of sample preparation. In addition, the dimensions of the micellar core can be controlled through variations in the length of the PFDMS block, which is achieved by altering the molecular weight of the diblock copolymer while maintaining a constant block ratio. In contrast, when micelles are formed above the T m of PFDMS (ca. 120−145 °C), spherical aggregates are formed, which suggests that crystallization of the core polymer is the driving force for the formation of wormlike micelles below T m . Furthermore, the analogues with amorphous polyferrocene blocks, poly(ferrocenylmethylphenylsilane- b -dimethylsiloxane) (PFMPS- b -PDMS) and poly(ferrocenylmethylethylsilane- b -dimethylsiloxane) (PFMES- b -PDMS), form spherical micelles in hexane at room temperature. This lends further support to the proposition that the crystalline nature of the PFDMS block plays a pivotal role in the unexpected formation of cylindrical micelles. To provide an application of this concept, an analogous PFDMS block copolymer with polyisoprene, PI- b -PFDMS, was prepared and, as predicted, was found to form cylindrical micelles in hexane.
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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) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| 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 it