Phase transition and water molecules in titanylphthalocyanine phase Y crystal

Literature Information

Publication Date 2001-03-14
DOI 10.1039/B009490K
Impact Factor 3.676
Authors

Michael L. Klein


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Abstract

We have performed several experiments and molecular dynamics calculations to investigate a phase transition of titanylphthalocyanine phase Y crystal and the behavior of water molecules in the crystal. We have shown that water is in the crystal as well as on its surface and the humidity dependence of the photosensitivity of the phase Y is due to the water on the surface. We propose a mechanism for the phase transition from the metastable phase Y to a stable phase I as follows. Water molecules on the surface detach as the crystal is heated to 100째C. At about 250째C water molecules in the crystal begin to jump from one space to another through channels connecting the spaces and as a result are expelled from the crystal. After the water molecules leave the spaces, the phase transition to phase I occurs by molecular rearrangement to shrink these spaces.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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