Pressure-induced chemistry for the 2D to 3D transformation of zeolites
Pressure-induced chemistry for the 2D to 3D transformation of zeolites
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DOI：
10.1039/c7ta09248b
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发表时间：
2018-03
影响因子：
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通讯作者：
M. Mazur;Á. Arévalo-López;P. Wheatley;Giulia P. M. Bignami;S. Ashbrook;Á. Morales‐García;P. Nachtigall;J. Attfield;J. Čejka;R. Morris
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文献类型：
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作者：
M. Mazur;Á. Arévalo-López;P. Wheatley;Giulia P. M. Bignami;S. Ashbrook;Á. Morales‐García;P. Nachtigall;J. Attfield;J. Čejka;R. Morris
ADOR是一种基于组装、拆卸、组织和重新组装四步机制的非常规合成策略，为沸石化学开辟了新的可能性。ADOR方法导致了具有可调孔隙率的IPC系列材料的发现。在这里，我们提出了在200 °C下在1 GPa的压力下使用Walker型多砧装置将2D沸石前体IPC-1 P首次压力诱导ADOR转化为完全结晶的3D沸石IPC-2（OKO拓扑结构）。令人惊讶的是，高压材料的密度低于在高温下简单煅烧IPC-1 P前体获得的产物（其产生IPC-4（PCR拓扑结构））（孔隙率较高）。采用PXRD、29 Si MAS NMR、SEM和HRTEM对样品进行了表征。理论计算表明，高压可导致制备尚未制备的其它ADOR沸石。
ADOR, an unconventional synthesis strategy based on a four-step mechanism: assembly, disassembly, organization, and reassembly, has opened new possibilities in zeolite chemistry. The ADOR approach led to the discovery of the IPC family of materials with tuneable porosity. Here we present the first pressure-induced ADOR transformation of 2D zeolite precursor IPC-1P into fully crystalline 3D zeolite IPC-2 (OKO topology) using a Walker-type multianvil apparatus under a pressure of 1 GPa at 200 °C. Surprisingly, the high-pressure material is of lower density (higher porosity) than the product obtained from simply calcining the IPC-1P precursor at high temperature, which produces IPC-4 (PCR topology). The sample was characterized by PXRD, 29Si MAS NMR, SEM, and HRTEM. Theoretical calculations suggest that high pressure can lead to the preparation of other ADOR zeolites that have not yet been prepared.