A new photochemical based route for the preparation of organic structure directing agents useful for zeolite synthesis

Abstract

[EN] A new photochemically induced [2+2] cycloaddition route for the synthesis of amines has been successfully applied for the preparation of a series of organic structure directing agents (OSDA's) that has been found to be able to direct the synthesis of zeolites. The main benefit of this new synthetic route is that it opens the possibility of obtaining a large number of OSDA's with high rigidity and low C/N ratio. Here, we report the employ of some OSDA's obtained by using this approach in the crystallization of pure silica, silico-aluminate and silico-germanate zeolites. This preliminary exploration has yielded to obtain by first time two new materials, ITQ-32 and ITQ-35, obtained as silico-aluminate and silico-germanate, respectively. Furthermore, other zeolites, such as Beta, Nonasil, and ZSM-12 have also been obtained, showing the ability of this new type of OSDA's for directing the crystallization of zeolites.