Triangular Cd(II)-Sm(III) Schiff Base Complex with Dual Visible and Near-Infrared Luminescent Responses to Nitro Explosives.

Two d-4f complexes [ZnNdL(OAc)]·OH () and [CdSmL(OAc)(OH)] () with a designed Schiff base ligand ,'-bis(3-methoxysalicylidene)(binaphthyl)-1,4-diamine (HL) were synthesized. The Schiff base ligands coordinate with metal ions by μ(η:η:η:η:η:η) and μ(η:η:η:η:η:η) modes in the complexes, which show typical lanthanide emissions. The triangular Cd-Sm complex shows both visible and NIR luminescent responses to nitrobenzene explosive 2,4,6-trinitrophenol (PA).