4,5‐Dichlorophthalate‐Extended Lanthanide Coordination Polymers with Layer and Ribbon Motifs: Synthesis, Structure, and Luminescence

Five new 4,5‐dichlorophthalate (dcpa)‐extended lanthanide coordination polymers (CPs) with formulas [ Ln 2 (H 2 O)(dcpa) 3 ] n ( Ln = Tb for 1 , Sm for 2 , Pr for 3 , and Nd for 4 ) and [Yb(H 2 O) 2 (dcpa)(Hdcpa)] n ( 5 ) were solvothermally synthesized. Structural determinations demonstrate that CPs 1 – 4 are crystallographically isostructural, exhibiting an infinite two‐dimensional layer with dimeric {Ln 2 (COO) 3 } subunits extended by aromatic skeleton of fully deprotonated dcpa 2– connectors. In contrast, complex 5 features a one‐dimensional broad ribbon with centrosymmetric {Yb 2 (COO) 2 } subunits propagated by pairs of ditopic dcpa 2– ligands. Interestingly, the anionic dcpa 2– connector can serve as a good antenna ligand to sensitize the characteristic emissions of the different Ln III ions in both the ultraviolet (for 1 – 3 ) and near‐infrared (for 4 and 5 ) regions.