Molecular structure and phase behaviour of neopentyl plastic crystals. (IMAGE)
Caption
Molecular structure and phase behaviour of neopentyl plastic crystals.
(a) Tetrahedral neopentyl molecules that differ only in the number of hydroxyl (–OH) groups. The –OH groups are shown in red (oxygen) and white (hydrogen).
(b) Simplified phase diagram showing different solid phases. α and β correspond to different ordered crystal phases, where molecules are fixed in position and orientation. γ corresponds to a disordered (plastic crystal) phase, where molecules can rotate more freely. The green hatched region indicates coexistence of ordered and disordered phases during the transition, and the red dot marks the composition studied in this work.
Credit
communications materials (2026)
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