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3‑D Antimonotungstate Framework Based on 2,6‑H2pdca-connecting Iron–Cerium Heterometallic Krebs-type Polyoxotungstates for Detecting Small Biomolecules
journal contribution
posted on 2021-01-25, 22:05 authored by Baoxing Zeng, Yan Zhang, Yanhong Chen, Guoping Liu, Yanzhou Li, Lijuan Chen, Junwei ZhaoAn
inorganic–organic hybrid 3-D FeIII–CeIII heterometallic antimonotungstate framework [Ce(H2O)5(2,6-pdca)]4H2[Fe4(H2O)6(SbW9O33)2]·38H2O (1) (2,6-H2pdca = 2,6-pyridine-dicarboxylic acid) has been synthesized
via a hydrothermal method by the one-pot reaction of 2,6-H2pdca, FeCl3·6H2O, Ce(NO3)3·6H2O, and Na9[B-α-SbW9O33]·19.5H2O. Notably, the structural
unit of 1 possesses a Krebs-type [Fe4(H2O)6(2,6-pdca)2(SbW9O33)2]10– subunit supported with
four bridging [Ce(H2O)5(2,6-pdca)]+ moieties. It is worth highlighting that adjacent structural units
are concatenated together through heterobimetallic bridges to construct
a 3-D framework. Furthermore, cuboid nanocrystal 1′ was prepared under mild hydrothermal conditions based on the electrostatic
interaction between 1 and K+. The effects
of concentration and time on the morphology of nanocrystal 1′ were also studied. The cuboid nanocrystal 1′ was used as a modified electrode material for simultaneous electrochemical
detection of dopamine and acetaminophen. The 1′-modified glassy carbon electrode shows good selectivity and sensitivity
for detecting dopamine and acetaminophen.
