科学家开发出一种新的锗硅酸盐沸石HPM

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科学家开发出一种新的锗硅酸盐沸石HPM

本期文章:《德国应用化学》:Online/在线发表

一个由马德里材料科学研究所Miguel A. Camblor小组牵头的国际合作项目开发出一种新的锗硅酸盐沸石HPM-14,该沸石具有相互联系的超大孔道、奇数元环孔道和小孔道。 2020年11月3日,《德国应用化学》发表了这项成果。

HPM-14是一种新型超大孔道分子筛,该分子筛合成中使用了咪唑鎓基有机导向剂,以及氟离子、锗和硅作为框架中四面体结构的组成部分。由于存在互相堆叠的无序结构,对HPM-14的结构表征具有一定挑战性,因此研究人员使用了许多不同技术来解析结构细节,以了解这种无序性的属性。

通过三维电子衍射技术(3D ED)对该材料的解析表明,HPM-14由具有三维通道系统的两个多晶型物共生组成,其中包括一个由十六个四面体原子组成的窗口打开的超大孔(16元环)以及另外两组奇数元孔(9元环)和小孔(8元环)。对这一共生的扫描透射电子显微镜和粉末X射线衍射模拟研究显示,单斜多晶型A在其中占主导地位。

附:英文原文

Title: HPM‐14, a New Germanosilicate Zeolite with Interconnected Extra‐Large Pores Plus Odd‐Membered and Small Pores

Author: Zihao Rei Gao, Jian Li, Cong Lin, Alvaro Mayoral, Junliang Sun, Miguel A. Camblor

Issue&Volume:03 November 2020

Abstract: HPM‐14 is a new extra‐large pore zeolite synthesized using imidazolium‐based organic structure‐directing agents, fluoride anions and germanium and silicon as tetrahedral components of the framework. Due to the presence of stacking disorder, the structure elucidation of HPM‐14 was challenging, and different techniques were necessary to clarify the details of the structure and to understand the nature of the disorder. The structure has been solved by three‐dimensional electron diffraction technique (3D ED) and consists of an intergrowth of two polymorphs possessing a three‐dimensional channel system, including an extra‐large pore opened through windows made up of sixteen tetrahedral atoms (16‐membered ring, 16MR) as well as two additional sets of odd‐membered (9MR) and small (8MR) pores. The intergrowth has been studied by scanning transmission electron microscopy (Cs‐STEM) and powder X‐ray diffraction simulations (DIFFaX), which show a large predominance of the monoclinic polymorph A.

DOI: 10.1002/anie.202011801

Source: https://onlinelibrary.wiley.com/doi/10.1002/anie.202011801

期刊信息

Angewandte Chemie:《德国应用化学》,创刊于1887年。隶属于德国化学会,最新IF:12.959
官方网址:https://onlinelibrary.wiley.com/journal/15213773
投稿链接:https://www.editorialmanager.com/anie/default.aspx

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