Microporous Sulfides, Chlorides, and Nitrides

The known classes of open-framework materials, such as zeolites, phosphates, and oxides, are primarily dominated by oxo frameworks. In 1989, however, Bedard and Wilson at of UOP[31] extended this kind of material to include metal sulfide compounds R-M MS-n (R indicates organic SDA M is a 3d or 4d metal M is Ge, Sn, Sb, or In). Their frameworks are constmcted by the corner-sharing or bridging of connected MS, clusters 

BAC-n B2O3 AI2O3 HCI h2o building units size (A) temperature (°C) 

Yaghi et al.[32] proposed an alternative route for the synthesis of these sulfides, in which crystals were obtained from the diffusion of an aqueous solution of the 3d metal into a solution of R-Ge4S10 complex at room temperature. In 1997, Martin and Greenwood133 successfully prepared a new class of microporous metal chlorides, named CZX-n, under solvothermal conditions (160°C) in benzene solution. The framework of CZX-1 is isostructural with the aluminosilicate sodalite (SOD), while CZX-2 

Following the above introduction of four special types of microporous compounds, the synthesis of four classes of microporous compounds with special structures and functions will be discussed below in detail. 

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