Stepwise Topotactic Transformations (1D to 3D) in Copper Carboxyphosphonate Materials: Structural Correlations

作者：Demadis Konstantinos D^*; Papadaki Maria; Aranda Miguel A G; Cabeza Aurelio; Olivera Pastor Pascual; Sanakis Yiannis

来源：Crystal Growth & Design, 2010, 10(1): 357-364.

DOI：10.1021/cg900943x

In this report, we demonstrate a topotactic transformation of a [Cu(HPAA)(H2O)(2)]center dot H2O one-dimensional (1D) hybrid (HPAA = HO3PCH(OH)CO2, hydroxyphosphonoacetate dianion) to an anhydrous Cu(HPAA) three-dimensional (3D) framework, via the 1D intermediate Cu(HPAA)(H2O)(2). Removal of lattice water from 1D [Cu(HPAA)(H2O)(2)]center dot H2O yields 1D Cu(HPAA)(H2O)(2) and results in alterations in hydrogen bonding interactions (chain center dot center dot center dot H2O center dot center dot center dot chain), and, in turn, compaction of the chains as well as "slipping". These changes are accompanied by creation of a new hydrogen bonding scheme (chain center dot center dot center dot chain) involving the phosphonate groups and the hydroxyl/carboxy moieties. The initial zigzag 1D chain is retained throughout the dehydration process. In 3D Cu(HPAA) the resulting vacant sites on Cu (generated by removal of both Cu-bound waters) are occupied by phosphonate oxygens from neighboring chains. All three materials have been characterized by X-ray diffraction and a variety of other techniques and their structures have been determined.

• 出版日期2010-1