view article
Figure 1
(Left) 2°AP molecule represented with its nearest neighbors within π-stacking, based on the structure of 2°AP-β determined at 100 K. Atomic displacement parameters at the 50% probability level. Intermolecular interaction energies are given in kJ mol−1, as estimated by CrystalExplorer17. (Right) UV–Vis emissions of 2°AP-α in blue and new 2°AP-β in orange in a vial after the melting experiment. 2°AP-α crystals are the product of resublimation.

IUCrJ
Volume 11| Part 4| July 2024| Pages 519-527
ISSN: 2052-2525
https://doi.org/10.1107/S2052252524003634