A new 3D fluorescent lanthanide-organic framework containing helical chains and zigzag layers from mixed carboxylate ligands

Abstract A new 3D lanthanide compound [Pr(H 2 O)(C 5 HN 2 O 4 )(CH 3 COO)·H 2 O] n ( 1 ) has been hydrothermally synthesized by employing 4,5-imidazoledicarboxylic (H 3 IDC) and acetic acid mixed ligands and characterized by element analysis, IR spectroscopy and thermal analysis, as well as single-crystal X-ray diffraction. The results show that complex 1 has a 3D (3,4)-connected network structure containing zigzag layers and 1D race -helical chains ( P - and M -chains), which denote the first example of lanthanide coordination framework including the mixed ligands of imidazole-4,5-dicarboxlylate and acetate. Moreover, compound 1 displays a strong photoluminescent property and a high thermal stability.