Large Polyoxotitanate Clusters: Well-Defined Models for Pure-Phase TiO2 Structures and Surfaces
Large Polyoxotitanate Clusters: Well-Defined Models for Pure-Phase TiO2 Structures and Surfaces
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DOI：
10.1021/ja106436y
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发表时间：
2010-10-06
影响因子：
15
通讯作者：
Coppens, Philip
中科院分区：
文献类型：
--
作者：
Benedict, Jason B.;Freindorf, Renata;Coppens, Philip
仔细控制叔丁醇钛和乙酸之间的反应的温度和持续时间导致形成新的具有14，18和28个Ti原子的聚氧钛酸盐簇。它们被认为是Ti/O纳米团簇生长的中间体。Ti-28星团是迄今为止最大的结晶。紫外/维斯光谱表明，该簇的光学带隙是蓝移相对于一个簇只包含17个钛原子，表明光学性质更严重的影响，由内部结构的颗粒比它的大小。
Careful control of the temperature and duration of the reaction between titanium tert-butoxide and acetic acid leads to the formation of new polyoxotitanate clusters with 14, 18, and 28 Ti atoms. They are considered intermediates in the growth of Ti/O nanoclusters of increasing size. The Ti-28 cluster is the largest crystallized to date. UV/vis spectroscopy on this cluster reveals that the optical band gap is blue-shifted with respect to a cluster containing only 17 titanium atoms indicating that the optical properties are more heavily influenced by the internal structure of the particle than its size.