Vitrification of octonary perylene mixtures with ultralow fragility
Journal article, 2021

Strong glass formers with a low fragility are highly sought-after because of the technological importance of vitrification. In the case of organic molecules and polymers, the lowest fragility values have been reported for single-component materials. Here, we establish that mixing of organic molecules can result in a marked reduction in fragility. Individual bay-substituted perylene derivatives display a high fragility of more than 70. Instead, slowly cooled perylene mixtures with more than three components undergo a liquid-liquid transition and turn into a strong glass former. Octonary perylene mixtures display a fragility of 13 ± 2, which not only is a record low value for organic molecules but also lies below values reported for the strongest known inorganic glass formers. Our work opens an avenue for the design of ultrastrong organic glass formers, which can be anticipated to find use in pharmaceutical science and organic electronics.


Sandra Hultmark

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Alexei Cravcenco

University of Gothenburg

Khushbu Kushwaha

University of Gothenburg

Suman Mallick

University of Gothenburg

Paul Erhart

Chalmers, Physics, Condensed Matter and Materials Theory

Karl Börjesson

University of Gothenburg

Christian Müller

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Science advances

2375-2548 (eISSN)

Vol. 7 29 eabi4659

Subject Categories

Physical Chemistry

Analytical Chemistry





Related datasets

Vitrification of Octonary Perylene Mixtures with Ultralow Fragility [dataset]

DOI: 10.5281/zenodo.4880208

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