New semi-organic nanostructures were synthesized by introducing 2-methylbenzimidazole perchlorate (MBI-HClO₄) molecules into porous borate glasses with pore sizes of ~3 and ~7 nm. X-ray diffraction studies have shown that the nanostructures contain several phases with the MBI-HClO₄ crystal structure, but slightly different lattice parameters. In some phases, as a result of the random orientation of the pores of the glasses, crystallites larger than the pore sizes are formed. The temperature and frequency dependences of capacitance, tgδ, and conductivity were measured for the obtained nanostructures. The results of the analysis of dielectric properties by methods of dielectric spectroscopy are presented. Keywords: nanostructures, crystal structure, X-ray diffraction, dielectric properties, dielectric spectroscopy.