A new 3D Cd(II)-based metal-organic framework as dual-function luminescent sensor to ions and antibiotic: Mechanism and theoretical studies

Abstract

Listen

Translate article

A new Cd(II) metal-organic framework (Cd-MOF), namely [Cd2(L)(H2O)3·3·4H2O]n (1) (H4L = (3-(2,4-dicarboxylphenyl)-2,6-dicarboxylpyridine)) was effectively produced. 1 shows a new 3D 3,5-connected network with gra topology built by the multi-carboxylate linker through (κ2)-(κ1)-μ2, (κ1)-(κ1)-μ1 and (κ0)-(κ1)-μ1 coordination modes. The sensing results showed that 1 would be a viable possibility for developing luminous sensors to sensitively probe nitrofurazone (NFZ), Fe3+, and CrO42-. The limits of detection (LODs) for Fe3+, CrO42−and NFZ were calculated to be 1.17 × 10–7 M-1, 1.63 × 10–7 M-1 and 7.03 × 10–8M-1, respectively. Density functional theory (DFT), UV–vis spectroscopy, and PXRD research have reinforced the understanding of luminescence sensing mechanisms.