High pressure induced phase transitions and chemical reaction of trans, trans-dibenzylideneacetone

作者：Tang X D; Zhang Z M; Zhao Z; Wang Z P; Ding Z J^*

来源：Chinese Journal of High Pressure Physics, 2009, 23(6): 401-406.

• EDXRD
• High pressure
• Phase transition
• Raman spectra
• Trans
• Trans-dibenzylideneacetone

By using a diamond anvil cell the trans, trans-Dibenzylideneacetone molecular crystal was studied with high pressure Raman, fluorescence spectroscopy and EDXRD at room temperature. A crystalline to crystalline phase transition is found at 1.0~1.3 GPa; meanwhile, a pressure induced chemical reaction is observed and the reaction is completed around 6.5 GPa. The EDXRD spectra show that a new covalent bond produces in this chemcial reaction process. The possible chemical reaction paths are suggested as the openning of C=C bond of the molecule and then combination between adjacent molecules. Another crystalline to crystalline phase transition forms around 11 GPa. After the pressure is released, the newly formed phase of material can remain stable at ambient conditions.

• 出版日期2009
• 单位中国科学技术大学