Abstract: In this study, we report the preparation and application of the AlC₄Pc-magnetic silica nanotubes(AlC₄Pc-MSNs), which was synthesized via alumina template membrane method. The synthesized outer-NH2-magnetic silica nanotubes(outer-NH₂-MSNs) were characterized by TEM, SEM, EDS and SQUID. Besides these, UV-Vis absorption spectra and fluorescence spectra were also recorded, which further indicate that the AlC₄Pc-MSNs have the similar features with free AlC₄Pc. The AlC₄Pc-MSNs not only have all the advantages of silica nanotubes, but also can be easily separated from the solution by external magnetic field. On the basis of the merits mentioned above, AlC₄Pc-MSNs was used for the detection of pH value. Our work herein reveals that the outer-NH₂-MSNs will be a promising platform for the applications of the targeting drug delivery, DNA transfection, selective separation, catalyst carriers and so on.

Key words: Magnetic silica nanotubes, Surface-amine functionization, Tetra-carboxy aluminum phthalocyanine, pH sensitivity