A novel Sm-metal–organic
framework (MOF) sensor with the
molecular formula Sm
8
(HDBA)
6
·H
2
O has been prepared based on a penta-carboxyl organic ligand (H
5
DBA = 3,5-di(2′,4′-dicarboxylphenyl)benzoic
acid) and samarium nitrate under solvothermal conditions. Sm-MOF is
characterized by single-crystal X-ray diffraction analysis, elemental
analysis, thermogravimetric analysis, and powder X-ray diffraction
analysis. Structural analysis shows that the dimer metal units are
alternately connected to form a one-dimensional chain, and this chain
is connected by the bridging carboxyl oxygen of the ligand H
5
DBA to form a two-dimensional double-layer plane, which then expands
into a three-dimensional microporous framework. Fluorescence detection
studies show that Sm-MOF can detect Ag
+
ions, MnO
4
–
anions, and cimetidine tablets with high sensitivity
and selectivity and can also be used to electrochemically detect
o
-nitrophenol in water. High-sensitivity detection capability
of the Sm-MOF can enrich the application of samarium complexes in
multifunctional sensors.