New luminescent porous coordination polymers with an acylamide-decorated linker for anion recognition and reversible I₂ accommodation

A series of new luminescent porous coordination polymers (PCPs) with acylamide groups have been prepared. Single-crystal X-ray analyses revealed that they have isomorphous structures and display significant 1D quadrilateral channels. The luminescence properties of NTU-2 and NTU-3 in the solid state have been studied in detail, which demonstrated that both of them are ideal luminescent sensors for selectively probing Cu²⁺ ions with high quenching effect coefficients (211.2 and 212.8 M^-1). Meanwhile, NTU-2, NTU-3 and NTU-4 show rapid and reversible I₂ accommodation properties.