Water-stable lanthanide-based metal-organic gel for the detection of organic amines and white-light emission

Highly luminous lanthanide metal-organic gels (Ln-MOGs) can act as fluorescent probes for the detection of organic amines and can also be used to build white-light emitting materials based on the different luminescent properties of lanthanide ions. Here, we reported a Ln-MOG constructed with a 3,5-di(2′,4′-dicarboxylphenyl)benozoic acid (DPBA) ligand and Tb 3+ . Tb-MOG has an excellent fluorescence detection effect on organic amines including ethylenediamine, triethylamine, diisopropylamine and aniline in aqueous solution, and their detection limits reach a sub-ppm level. Considering the practicality, a Tb-MOG testing paper was prepared by a spin coating process, which can detect volatile organic amine vapors with good recyclability. Additionally, a single-phase white-light Tb 0.84 Eu 0.16 -MOG material was realized by in situ doping of Tb-MOG with Eu 3+ and reasonably utilizing the blue emission of DPBA. A lanthanide metal-organic gel was prepared as a fluorescent probe for detecting organic amines and serving as a white-light emitting material based on the different luminescence characteristics of its lanthanide ions and organic ligands.