Spatially Ordered Quantum Dot Array of Indium Nanoclusters in Fully Indium-Exchanged Zeolite X
Spatially Ordered Quantum Dot Array of Indium Nanoclusters in Fully Indium-Exchanged Zeolite X
复制标题
全铟交换沸石 X 中铟纳米团簇的空间有序量子点阵列
DOI：
10.1021/jp0219348
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发表时间：
2003
影响因子：
3.3
通讯作者：
K. Seff
中科院分区：
文献类型：
--
作者：
N. Heo;Jong Sam Park;A. Kim;W. Lim;Sunghan Jung;K. Seff
在 X 沸石单晶中合成了阳离子铟纳米团簇的空间有序量子点阵列。将完全脱水且完全铟交换的 X 沸石单晶（约 In87Si100Al92O384，In87−X）在 673 K 下暴露于 0.5 atm H2S 中 12 小时。在温度下抽真空并冷却至294 K，产物（ca. In66Si100Al92O384，In66−X，a = 24.942(4) A）的晶体结构通过立方空间群 Fd3m 中的单晶 X 射线衍射技术确定。对于 Fo > 4σ(Fo) 的 754 次反射，将所有测量的反射进行细化，最终误差指数 R1 = 0.058。 X射线光电子能谱实验证实单晶内存在原子和阳离子铟。每个晶胞有 66 个铟原子或离子，位于四个晶体学上不同的位置，全部位于 3 倍轴上。方钠石单元中心有 8 个 In 原子，附近有 32 个 Inca.2+ 离子 (Inca.2+−In0 = 2.683(1) A)，两者都填充了它们的晶体...
A spatially ordered quantum dot array of cationic indium nanoclusters has been synthesized in a single crystal of zeolite X. A single crystal of fully dehydrated and fully indium-exchanged zeolite X (ca. In87Si100Al92O384, In87−X) was exposed to 0.5 atm of H2S for 12 h at 673 K. After it was evacuated at temperature and cooled to 294 K, the crystal structure of the product (ca. In66Si100Al92O384, In66−X, a = 24.942(4) A) was determined by single crystal X-ray diffraction techniques in the cubic space group Fd3m. It was refined with all measured reflections to the final error index R1 = 0.058 for the 754 reflections with Fo > 4σ(Fo). X-ray photoelectron spectroscopy experiments confirmed the existence of both atomic and cationic indiums inside the single crystal. The 66 indium atoms or ions per unit cell were found at four crystallographically distinct positions, all on 3-fold axes. Eight In atoms at the sodalite unit centers and 32 Inca.2+ ions nearby (Inca.2+−In0 = 2.683(1) A), both filling their crysta...