Vitrification of octonary perylene mixtures with ultralow fragility
Artikel i vetenskaplig tidskrift, 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.

Författare

Sandra Hultmark

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Alexei Cravcenco

Göteborgs universitet

Khushbu Kushwaha

Göteborgs universitet

Suman Mallick

Göteborgs universitet

Paul Erhart

Chalmers, Fysik, Kondenserad materie- och materialteori

Karl Börjesson

Göteborgs universitet

Christian Müller

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Christian Müller Group

Science advances

2375-2548 (eISSN)

Vol. 7 29 eabi4659

Ämneskategorier

Fysikalisk kemi

Analytisk kemi

DOI

10.1126/sciadv.abi4659

PubMed

34272241

Mer information

Senast uppdaterat

2021-07-29