Hee-Soo So, Takaya Minami, Takumi Jindo and Shinya Matsumoto
CrystEngComm, 2018,20, 5317-5320
DOI:
10.1039/C8CE00940F,
Communication
Two polymorphs of a N,N′-dipropylated diketopyrrolopyrrole dye, one yellow and the other orange, were obtained. The yellow polymorph showed a mechanical response upon heating. The X-ray analytical results indicated that the yellow polymorph changed into the orange one during the mechanical response, with a significant change in molecular conformation, molecular arrangement, and space group.
