Molecular Tectonics. Disruption of Self-Association in Melts Derived from Hydrogen-Bonded Solids
Bibliographic record
Abstract
An effective strategy for making new ordered molecular materials by design is to build them from subunits that associate with their neighbors and thereby hold them in predetermined positions. Such tectons can be made by attaching multiple peripheral sites of association to geometrically suitable cores. In tectons 3 − 5, for example, simple triaminotriazine groups grafted to a nominally tetrahedral tetraphenylmethyl core form intermolecular hydrogen bonds according to reliable motifs, and crystallization thereby leads to the formation of porous three-dimensional networks. Functionalization of the triaminotriazine groups with alkyl chains gives rise to amorphous tectons, and the increase of the chain length lowers the glass transition temperatures of these materials, allowing their association in the melt to be studied by rheological methods. The rheological properties depend in a characteristic way on the length of the alkyl substituents. In particular, viscosity and T g both decrease with increasing length of the alkyl chains in the series of tectons 7 − 10, suggesting that intertectonic hydrogen bonding is increasingly diminished by the steric effects of the substituents. In this way, formation of extended hydrogen-bonded networks becomes gradually unfavorable, and mobility and fluidity are enhanced. For these reasons, melts derived from tectons 7 − 10 do not behave like conventional linear polymers or dendrimers, but rather form a novel class of materials with unique properties of their own.
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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".