Vitrification of octonary perylene mixtures with ultralow fragility

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.

Synthesis and crystal packing of perylene-derivatives with extreme sterically demanding pentaphenylbenzene bay-substituents

Extremely flexible PDI-PPBs: perylenes with a varying number of PPBs and different peri-moieties were synthesized. The isolated regioisomers exhibit remarkably different properties. X-ray crystallography reveals sufficient suppression of aggregation.

Chiral diphenylacrylonitrile-perylene liquid crystal with circularly polarized luminescence in aggregated state

Although various perylene derivatives had been studied widely, circularly polarized luminescence (CPL) perylene in aggregated state was seldom presented due to the ACQ effect. In this work, a novel diphenylacrylonitrile-perylene...

Pyrene-1,5,6,10-Tetracarboxyl Diimide: A New Building Block for High-Performance Electron-Transporting Polymers

Both naphthalene and perylene derivatives bearing six-membered-ring dicarboximide groups are proven valuable modules for preparing organic electron-transporting semiconductors. However, obtaining their analogue with pyrene appeared challenging, as all previous endeavors...