Synthesis Design and Structure of a Multipore Zeolite with Interconnected 12- and 10-MR Channels

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• 作者：Manuel Moliner ; Tom Willhammar ; Wei Wan ; Jorge Gonz谩lez ; Fernando Rey ; Jose L. Jorda ; Xiaodong Zou ; Avelino Corma
• 刊名：The Journal of the American Chemical Society
• 出版年：2012
• 出版时间：April 11, 2012
• 年：2012
• 卷：134
• 期：14
• 页码：6473-6478
• 全文大小：370K
• 年卷期：v.134,no.14(April 11, 2012)
• ISSN：1520-5126

文摘

A new molecular sieve, ITQ-38, containing interconnected large and medium pores in its structure has been synthesized. The rational combination of dicationic piperidine-derivative molecules as organic structure directing agents (OSDAs) with germanium and boron atoms in alkaline media has allowed the synthesis of ITQ-38 zeolite. High-resolution transmission electron microscopy (HRTEM) has been used to elucidate the framework topology of ITQ-38, revealing the presence of domains of perfect ITQ-38 crystals as well as very small areas containing nanosized ITQ-38/ITQ-22 intergrowths. The structure of ITQ-38 is highly related to ITQ-22 and the recently described polymorph C of ITQ-39 zeolite. It shares a common building layer with ITQ-22 and contains the same building unit as the polymorph C of ITQ-39. All three structures present similar framework density, 16.1 T atoms/1000 脜³.