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- Title
Anisotropic Dissociation of π-π Stacking and Flipping-Motion-Induced Crystal Jumping in Alkylacridones and Their Dicyanomethylene Derivatives.
- Authors
Takashi Takeda; Tomoyuki Akutagawa
- Abstract
Ethylacridone (1 b) and dicyanomethylenated acridones 2 a,b,d showed crystal-jumping activity upon heating. This is the first example of thermosalient behavior in a simple aromatic ketone and its derivatives. A systematic investigation of the jumping behavior of derivatives with different alkyl chains by variable-temperature X-ray crystal-structure analyses revealed the mechanism of this phenomenon. Anisotropic dissociation of π stacking in a dimer was important for inducing crystal jumping in 1 b, whereas the collective fluctuation/flipping motion of a dicyanomethylene unit induced crystal jumping in 2.
- Subjects
CARBENE derivatives; DISSOCIATION (Chemistry); CRYSTAL structure; ANISOTROPY; FLUCTUATIONS (Physics); CRYSTAL growth
- Publication
Chemistry - A European Journal, 2016, Vol 22, Issue 23, p7763
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201600794