Anion-Induced Structures and Luminescent Properties of Chiral Lanthanide−Organic Frameworks Assembled by an Achiral Tripodal Ligand

To confirm how different anions influence sup-ramolecular self-assembly of lanthanide−organic frameworks (LnOFs) as well as their luminescent properties, a new flexible achiral tripodal ligand, 1,1,1-tris-{[(2′-benzylaminoformyl)phenoxyl]methyl}ethane (L) and the LnOFs {[EuL(NO<sub>3</sub>)<sub>3</sub>]·1.5CHCl<sub>3</sub>}<sub><i>n</i></sub> and [EuL(pic)<sub>3</sub>]<sub><i>n</i></sub> have been designed and assembled. In the two LnOFs, {[EuL(NO<sub>3</sub>)<sub>3</sub>]·1.5CHCl<sub>3</sub>}<sub><i>n</i></sub> demonstrates an unprecedented chiral noninterpenetrated two-dimensional (2D) honeycomblike (6,3) (hcb, Schläfli symbol 6<sup>3</sup>, vertex symbol 6·6·6) topological network, and [EuL(pic)<sub>3</sub>]<sub><i>n</i></sub> confirms an unusual chiral LnOF with three-dimensional (3D) (10,3)-a (srs, SrSi<sub>2</sub>, Schläfli symbol 10<sup>3</sup>, vertex symbol 10<sub>2</sub>·10<sub>4</sub>·10<sub>4</sub>) topological framework. Also the anion-induced structures and energy transfer processes in the luminescence behavior of the two LnOFs were discussed in detail.