A functionalized Eu3+ metal-organic framework for selective fluorescent detection of pyrene

A functional 3D lanthanide metal -organic framework (Eu-4L) was successfully designed and synthesized by solvothermal method. The ligand of Eu-4L is a kind of diphenylamine tetracarboxylic acid derivative (named H4L). The specific surface area of Eu-4L was high, which made Eu-4L have an excellent 3D structure. Eu-4L had good thermostability and can remain stable in water of pH from 3 to 11. Eu-4L can be used as a fluorescent probe for sensing pyrene. The limit of detection of Eu-4L for sensing pyrene was 5 mu mol center dot L-1, which displays high sensitivity. Eu - 4L is also a kind of recyclable material. The fluorescence sensing mechanism of Eu - 4L for sensing pyrene belongs to the static mechanism. Moreover, the selectivity and competition of Eu- 4L are also discussed. CCDC: 2268274.