Synthesis of Polyoxometalate Microtubes with Hierarchical Structure and the Adsorption of Doxorubicin

Abstract

Saturated Keggin-type SiW12 microtubes have been synthesized from the trivacant SiW9 by a simple template-free method. The microtubes were characterized by Fourier transform infrared( FTIR) spectroscopy,powder X-ray diffraction( PXRD) and thermogravimetric analysis( TGA). The hierarchical structure was examined by optical micrograph and field emission enviromental scanning electron microscope( ESEM). To apply the hierarchical structure,doxorubicin( DOX) was adsorbed in the as-prepared SiW12 microtubes,and DOXloaded microtubes were obtained,which showed red luminescence of doxorubicin under violet light excitation.