3D Lanthanide–organic coordination polymers built upon infinite 1D secondary building units

Hydrothermal reactions of Ln(NO3)3 (Ln = La, Eu) with 1,4-phenylenedipropionic acid (H2PDP) generate 3D coordination polymers with the empirical formula [Ln2(PDP)3(H2O)2]. The isostructural compounds crystallize in triclinic space group P1¯. Each Ln(III) ion is nine-coordinate through ligation to one water molecule and eight carboxylate oxygen atoms. The 3D network structure of [Ln2(PDP)3(H2O)2] consists of infinite 1D Ln(H2O)–OOC secondary building units (SBUs) that are cross-linked via –CH2CH2C6H4CH2CH2– tethers of the PDP anions.

Graphical abstractHydrothermal reactions of Ln(NO3)3 (Ln = La, Eu) with 1,4-phenylenedipropionic acid (H2PDP) yield two isostructural coordination polymers of empirical formula [Ln2(PDP)3(H2O)2], which show a 3D network structure consisting of infinite 1D Ln(H2O)–OOC secondary building units (SBUs) that are cross-linked via –CH2CH2C6H4CH2CH2– tethers of the PDP anions.Figure optionsDownload full-size imageDownload as PowerPoint slide