Owing to their extra-large pores compared to traditional aluminosilicate zeolites, silicogermanates could be attractive for the catalytic transformation of bulky molecules, provided the frameworks can be modified to incorporate acid sites and can be stabilized to survive calcination. Post-synthetic isomorphic substitution of Ge by Si and Al would present a route to achieve this goal. This report describes the transformation and characterization of the non-stable IM-12 silicogermanate into a new stable IZM-7 aluminosilicogermanate by partially substituting Ge by Si in gaseous form to stabilize the material, followed by an aqueous alumination step. IZM-7-based catalyst presents promising performance in the hydroconversion of n-decane compared to conventional zeolites, opening perspectives for the catalytic use of stable derivatives of silicogermanate zeolites.

与传统的铝硅酸盐沸石相比，由于它们的超大孔，硅锗酸盐可能对大分子的催化转化具有吸引力，前提是可以对框架进行改性以加入酸性位点并且可以稳定以在煅烧中存活。用 Si 和 Al 对 Ge 进行合成后同晶置换将提供实现这一目标的途径。本报告描述了不稳定的 IM-12 硅锗酸盐转化和表征为新的稳定的 IZM-7 铝硅锗酸盐，方法是用气态形式的 Si 部分取代 Ge 以稳定材料，然后是水铝化步骤。IZM-7 基催化剂在n的加氢转化中表现出良好的性能-癸烷与传统沸石相比，为硅锗酸盐沸石稳定衍生物的催化应用开辟了前景。