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B22-Multimode InfraRed imaging And Microspectroscopy	Polyamorphism mirrors polymorphism in the liquid–liquid transition of a molecular liquid Finlay Walton , John Bolling , Andrew Farrell , Jamie Macewen , Christopher D. Syme , Mario González-Jiménez , Hans Martin Senn , Claire Wilson , Gianfelice Cinque , Klaas Wynne Journal Of The American Chemical Society DOI: 10.1021/jacs.0c01712 Diamond Proposal Number(s): [20351] Open Access Show Abstract ▼ Abstract: Liquid-liquid transitions between two amorphous phases in a single-component liquid have courted controversy. All known examples of liquid–liquid transitions in molecular liquids have been observed in the supercooled state suggesting an intimate connection with vitrification and locally favored structures inhibiting crystallization. However, there is precious little information about the local molecular packing in supercooled liquids meaning that the order parameter of the transition is still unknown. Here, we investigate the liquid–liquid transition in triphenyl phosphite and show that it is caused by the competition between liquid structures that mirror two crystal polymorphs. The liquid–liquid transition is found to be between a geometrically frustrated liquid to a dynamically frustrated glass. These results indicate a general link between polymorphism and polyamorphism and will lead to a much greater understanding of the physical basis of liquid–liquid transitions and allow the systematic discovery of other examples.	Apr 2020

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B22-Multimode InfraRed imaging And Microspectroscopy

Polyamorphism mirrors polymorphism in the liquid–liquid transition of a molecular liquid

Finlay Walton , John Bolling , Andrew Farrell , Jamie Macewen , Christopher D. Syme , Mario González-Jiménez , Hans Martin Senn , Claire Wilson , Gianfelice Cinque , Klaas Wynne

Journal Of The American Chemical Society

DOI: 10.1021/jacs.0c01712

Diamond Proposal Number(s): [20351]