The Synthesis of an Extra-Large-Pore Zeolite with Double Three-Ring Building Units and a Low Framework Density

摘要

Zeolites are crystalline inorganic solids formed by TO4 tetrahedra (T=Si, P, Al, Ge, etc.) with a well-defined system of regular pores having diameters up to about 2nm. The possibility of tuning pore dimensions and framework compositions have made zeolites the most successful materials for applications in gas adsorption and separation and for catalysis. Their uses have been further expanded to microelectronics for preparing materials with low values of the high-frequency dielectric constant or manufacturing encapsulated light-emitting devices (LEDs), to medicine for diagnostic treatments and controlled drug delivery, or for release of semiotics for controlling insect populations in agricultural uses.