在高温高压条件下制备的新型开放框架铕硅酸盐。

Novel open-framework europium silicates prepared under high-temperature and high-pressure conditions.

作者信息

Liu Wei, Ji Ying, Bao Xinjian, Wang Ying, Li Benxian, Wang Xiaofeng, Zhao Xudong, Liu Xiaoyang, Feng Shouhua

机构信息

State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun, 130012, P. R. China.

出版信息

Dalton Trans. 2014 Oct 7;43(37):13892-8. doi: 10.1039/c4dt01707b. Epub 2014 Aug 11.

DOI:10.1039/c4dt01707b

PMID:25111041

Abstract

Two new europium silicates, Na15Eu3Si12O36 (denoted as 1) and K2EuSi4O10F (denoted as 2), were successfully synthesized under high-temperature and high-pressure conditions, and structurally characterized by single-crystal and powder X-ray diffraction (XRD). The single-crystal XRD analysis of 1 reveals that its structure is based on [Si6O18]n(12n-) cyclosilicate anions that are built from six SiO4 tetrahedra sharing two of their four O corners with each other. Such [Si6O18]n(12n-) cyclosilicate anions are linked via EuO6 octahedra to form a three-dimensional (3D) framework containing 6-membered ring channels delimited by the SiO4 tetrahedra and EuO6 octahedra along the [010] direction. The structure of 2 consists of infinite tubular chains of corner-sharing SiO4 tetrahedra, which are further linked together via corner sharing O atoms by infinite chains of EuO4F2 octahedra forming a 3-D framework that contains 8-ring and 6-ring channels along the [010] direction. The photoluminescence properties of 1 and 2 were also investigated.

摘要

在高温高压条件下成功合成了两种新型铕硅酸盐，Na15Eu3Si12O36（记为1）和K2EuSi4O10F（记为2），并通过单晶和粉末X射线衍射（XRD）对其结构进行了表征。对1的单晶XRD分析表明，其结构基于[Si6O18]n(12n-)环状硅酸盐阴离子，该阴离子由六个SiO4四面体组成，它们的四个O角中的两个彼此共享。这种[Si6O18]n(12n-)环状硅酸盐阴离子通过EuO6八面体连接形成三维（3D）框架，该框架包含沿[010]方向由SiO4四面体和EuO6八面体界定的六元环通道。2的结构由角共享SiO4四面体的无限管状链组成，这些链通过角共享O原子进一步与EuO4F2八面体的无限链连接在一起，形成一个沿[010]方向包含8环和6环通道的3D框架。还研究了1和2的光致发光性质。