A well-known organic host, tris-o-phenylenedioxycyclotriphosphazene, exists in two polymorphic guest-free forms: the thermodynamic nonporous high-density phase and the kinetic porous low-density phase. Simple pressurization of the high density phase with CO2 brings a solid-state transformation to the low density phase. As a consequence, the crystal volume expands significantly by 23% with conformational change of the host molecules from Cs symmetry to D3h symmetry.
Revised: February 2, 2011 |
Published: January 14, 2011
Citation
Tian J., P.K. Thallapally, J. Liu, G.J. Exarhos, and J.L. Atwood. 2011.Gas-induced solid state transformation of an organic lattice: from nonporous to nanoporous.Chemical Communications 47, no. 2:701-703.PNNL-SA-72646.doi:10.1039/C0CC04260A