posted on 2019-03-06, 21:52authored byZhang Xiaoxiong, Zhang Wenjun, Li Cuiliu, Qin Xiaohong, Zhu Chengyu
Because of its extreme
toxicity, the determination of Hg2+ in aqueous solution
is an important subject for human health and
environmental monitoring. In this study, a novel UIO-66-type metal–organic
framework (MOF) doped with Eu3+ (isophthalic acid and 2,6-pyridinedicarboxylic
acid and zirconium chloride served as the organic connectors and metal
precursor, respectively) was prepared by a hydrothermal method and
postsynthetic modification. The obtained lanthanide MOFs exhibited
good photothermal and fluorescence stability in aqueous solution.
As a luminescent probe, dispersions of the material can specifically
recognize Hg2+ in many ions and have a detection limit
of 8.26 nM. This novel lanthanide MOF shows great potential applications
for biosensing, imaging, environmental analysis, and so on.