Synthesis and characterization of Zn2+/Cd2+ doped polyoxometalate microtubes

Metal ions doped polyoxometalate (POM) microtubes (M–SiW12; M = Zn2+, Cd2+) have been synthesized in aqueous solution by a simple method. The microtubes were characterized by FT-IR, UV/Vis, XPS, elemental analysis, and their morphology was examined by ESEM-FEG. The Zn2+ or Cd2+ doped in POM microtubes were chelated with 8-hydroxyquinoline, to obtain novel POM microtubes (MQ2–SiW12) with fluorescence.

Graphical AbstractThe Zn2+ and Cd2+ doped 12-tungstosilicate microtubes (Zn–SiW12 and Cd–SiW12) have been obtained from aqueous solution by a simple method, and the obtained microtubes exhibited intense fluorescence after further modifying by 8-hydroxyquinoline.Figure optionsDownload as PowerPoint slideResearch Highlights
► The Zn2+ and Cd2+ ions doped POM microtubes were synthesized.
► The doped Zn2+ and Cd2+ ions were chelated with 8-hydroxyquinoline.
► The obtained MQ2–SiW12 microtubes maintained the microtubular morphology.
► The obtained MQ2–SiW12 microtubes exhibited intense fluorescence.