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Chinese Journal of High Pressure Physics  > 2009  >  23(6): 401-406 .
TANG Xu-Dong, ZHANG Zeng-Ming, ZHAO Zhi, WANG Zhong-Ping, DING Ze-Jun. High Pressure Induced Phase Transitions and Chemical Reaction of Trans, Trans-Dibenzylideneacetone[J]. Chinese Journal of High Pressure Physics, 2009, 23(6): 401-406 . doi: 10.11858/gywlxb.2009.06.001
Citation: TANG Xu-Dong, ZHANG Zeng-Ming, ZHAO Zhi, WANG Zhong-Ping, DING Ze-Jun. High Pressure Induced Phase Transitions and Chemical Reaction of Trans, Trans-Dibenzylideneacetone[J]. Chinese Journal of High Pressure Physics, 2009, 23(6): 401-406 . doi: 10.11858/gywlxb.2009.06.001
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High Pressure Induced Phase Transitions and Chemical Reaction of Trans, Trans-Dibenzylideneacetone

doi: 10.11858/gywlxb.2009.06.001

  • Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei 230026, China

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  • Corresponding author: DING Ze-Jun
  • Received Date: 09 Mar 2009
  • Rev Recd Date: 23 Apr 2009
  • Publish Date: 15 Dec 2009
    Abstract
  • 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.

     

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