A novel sandwich-tungstoantimonate cluster with FeII ions: synthesis, magnetic property and electrochemical sensing of dopamine

Herein, a sandwich-type tungstoantimonate [Na(H2O)(2)](3)[C3H5N2](2)[SbW9O33](2)[Fe-II(C3H4N2)](3)center dot 4H(2)O (1) has been synthesized using iron powder as a starting material under conventional reaction conditions. The structure of 1 was determined by single-crystal X-ray diffraction and further characterized by IR spectrum, UV-vis spectra, and diffuse reflectance spectrum. The successful synthesis of compound 1 demonstrates an effective method for the synthesis of Fe-II-based polyoxometalates. The functional applications of compound 1 in both photocatalytic degradation of methyl orange and electrochemical sensing of dopamine were also demonstrated experimentally.