Diarylethene microcrystals make directional jumps upon ultraviolet irradiation
Journal Article
·
· Journal of Chemical Physics
- Laboratoire de Spectrometrie Physique CNRS UMR5588, Universite Grenoble I (France)
Microcrystals of a diarylethene {l_brace}1,2-bis[5{sup '}-methyl-2{sup '}-(2{sup ''}-pyridyl)thiazolyl]perfluorocyclo-pentene {r_brace} undergo jumps upon photoirradiation. These photochromic crystals present molecular structural changes upon irradiation with ultraviolet light because of reversible photocyclization reactions. When the energy absorbed by crystals reaches about 10 {mu}J, the uniaxial stress induced in the crystal lattice relaxes through directional jumps. If one prevents crystals from jumping, then parallel, equidistant cracks appear on crystal surfaces. These photomechanical effects could result from a Grinfeld surface instability.
- OSTI ID:
- 20868208
- Journal Information:
- Journal of Chemical Physics, Journal Name: Journal of Chemical Physics Journal Issue: 1 Vol. 126; ISSN JCPSA6; ISSN 0021-9606
- Country of Publication:
- United States
- Language:
- English
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