I. Turowska-Tyrk
Mar 15, 2003
Citations
0
Influential Citations
18
Citations
Journal
Chemical Physics
Abstract
Abstract The crystal of 1,5-diphenyl-1,4-pentadien-3-one shows disappearance of reflections during UV/Vis irradiation without changes in its external appearance. The behaviour of molecules and changes in the crystal structure were monitored at initial stages of this process by the use of the X-ray diffraction and the structure analysis. The studies revealed that the photo-induced rearrangement in the crystal proceeds in a smooth way with a constant rate and it is accompanied by (a) the reduction of a percentage of the translationally related molecules; (b) the change of the existing molecular disorder; (c) the increase of intermolecular distances and (d) the change of the cell constants and the increase of the unit cell volume. The presented work is the first example of such studies in the scientific literature.