【作者】 刘威； 刘扶阳； 王颖； 纪莹； 刘晓旸；

【Author】 Wei Liu;Fuyang Liu;Ying Wang;Ying Ji;Xiaoyang Liu;State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,Jilin University;

【机构】 吉林大学无机合成与制备化学国家重点实验室；

【摘要】 本文采用高温高压合成方法,合成出了一个具有新颖结构的稀土硅酸盐微孔化合物。由单晶数据进行结构分析得出其分子式为Na15Eu3Si12O36,它属于Pnnm空间群,晶胞参数为a=10.7143(3),b=7.5271和c=10.4913。Na15Eu3Si12O36的结构可以看作是由[Si6O12]12n-n环硅酸盐阴离子和EuO 6八面体相连所构筑成的三维骨架结构。图3.1(a)所示为Na15Eu3Si12O36垂直于[110]方向的环硅酸盐阴离子层,由图可见该环硅酸盐阴离子层是由分别沿[110]方向和[1-10]方向的两种不同的[Si6O12]12n-n环硅酸盐阴离子所构成。[Si6O12]12n-n环硅酸盐阴离子由EuO6八面体相连,形成沿[010]方向的具有4,6元环的三维结构。Na+离子位于骨架的空隙中,起平衡电荷的作用。对Na15Eu3Si12O36的荧光光谱进行了研究发现其表现为Eu3+离子的特征光谱。更多还原

【Abstract】 A new europium silicates, Na15Eu3Si12O36, was successively 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 Na15Eu3Si12O36 reveals that its structure is based on [Si6O18]12n-n cyclosilicate anions that are built from six Si O4 tetrahedra sharing two of their four O corners with each other. Such [Si12n-6O18]n cyclosilicate anions are linked via Eu O6 octahedra to form a three-dimensional(3D) framework containing 6-membered ring channels delimited by the Si O4 tetrahedra and Eu O6 octahedra along the [010] direction.更多还原