LAUSR

Abstract A new three dimensional framework {[Cd2(BPDPE)2(chdc)2(H2O)2]·4H2O}n (1) (BPDPE = 4,4′-bis(pyridyl)diphenyl ether H2chdc = 1,4-cyclohexanedicarboxylic acid) has been successfully synthesized and characterized. In this complex, the chdc2− adopts tran- configuration, was linked by three types of Cd ions to form wave-like 2D layer with hexagonal grids. The 2D layers are linked by meso-helical chains Cdn(BPDPE)n to form a 3D framework. It is surprised find that complex 1 can highly sensitive sense 2, 4, 6-trinitrophenol (TNP) through luminescence quenching effect, the quenching constant is up to 2.794 × 105 M−1. In addition, complex 1 also presents highly sensitive fluorescent sensor for detecting Fe3+ and Ag+ ions. The quenching constants are 2.893 × 104 M−1 and 1.483 × 104 M−1. Furthermore, the quenching mechanisms of complex 1 as multifunctional sensor have been studied.