| Abstract
| - A second-order phase transition induced by absorption of acetone in nanoporous zinc terephthalate,Zn2(C8H4O4)2(C6H12N2), has been studied by 2H NMR and DSC data. The heterogeneous system [Zn2(C8H4O4)2(C6H12N2)]·n(CH3)2CO (n = 0−5) is tetragonal at n< ne ≈ 2.5, with the crystal symmetry being lowered atn> ne (to orthorhombic). The breaking of symmetry is related to a combination of a pseudo Jahn−Tellereffect and the influence of quantum confinement on the dynamic behavior of the absorbed molecules in themetal−organic nanotube framework.
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