Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 111, Issue 51, Pages 18878-18881Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp0748967
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The enantiotropic polymorphic phase transformation of di-indenoperylene (DIP) at 403 K has been structurally characterized, using single-crystal X-ray diffraction. Both the low temperature alpha-and the high-temperature ss-phase have a herringbone -type structure, with the a-phase being triclinic with doubled unit cell volume compared to the monoclinic ss-phase. In the latter, the molecules have a more upright orientation in the herringbone plane. The epitactic transformation from ss-to alpha-phase involves strong shearing displacements as well as bending and torsional deformations of the DIP molecules.
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