title: Dynamic crystal-to-crystal conversion of a 3D-3D coordination polymer by de- and re-hydration.
abstract: A reversible crystal-to-crystal transformation of a 3D lead(II) coordination polymer with the ligand 4-pyridinecarboxylic acid (4-Hpyc), from [Pb(4-pyc)(2)(H(2)O)](n) (1) to [Pb(4-pyc)(2)](n) (2) by de- and re-hydration, has been observed and the structures of 1 and 2 were determined by single-crystal X-ray diffraction. The thermal stabilities of compounds 1 and 2 were studied by thermal, gravimetric and differential thermal analyses. Powder X-ray diffraction experiments showed that the phase transitions observed for the single crystals also occur in the batch powder samples and lead to mono phasic products.
authors.affiliation: Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, Tehran, Islamic Republic of Iran.
authors.forename: Alireza
authors.initials: A
authors.lastname: Aslani
authors.forename: Ali
authors.initials: A
authors.lastname: Morsali
authors.forename: Matthias
authors.initials: M
authors.lastname: Zeller