Spiral frameworks constructed by 1,2-phenylene-dioxydiacetic acid as highly sensitive and selective luminescent probes to detect PO43− ions in aqueous solutions

Abstract

Three novel clubbed photo-luminescent lanthanide–organic frameworks 1D coordination polymers, [Ln(L)(NO₃)(H₂O)₂]_n (1–3) (where Ln is La, Ce, and Pr, respectively, and H₂L = 1,2-phenylenedioxydiacetic acid), have been synthesized in a concise and reproducible manner under hydrothermal conditions. It is worth noting that the H₂L ligand is used for the first time in synthesis complexes. 1, 2 and 3 possess same structure with the same topology of [3^3; 4^2; 5] built using Ln-L 1D helical chains. Fluorescence properties of the obtained complexes have been studied in detail, revealing that 3 can sensitively and selectively detect pollutant PO₄³⁻ among various anions.