Graduate School of Materials and Science, Nara Institute of Science and Technology, NAIST, 8916-5 Takayama, Ikoma, Nara 630-0192, Japan.
Langmuir. 2011 Sep 6;27(17):10947-52. doi: 10.1021/la200963g. Epub 2011 Jul 27.
The fabrication of nanocrystals (NCs) composed of the cationic Au(I) complex was demonstrated by the reprecipitation method in which the colloidal solution of the NCs showed brilliant green phosphorescence with a quantum yield of 83% in n-hexane. Characterization of the prepared NCs was performed by transmission electron microscopy observation and elemental analysis with energy-dispersive X-ray spectroscopy. The obtained Au(I) NCs were particles of random shapes with a diameter of 200-400 nm. The selected-area electron diffraction and X-ray diffraction measurements showed the characteristic diffraction patterns attributable to the crystal structure of the bulk crystal of the Au(I) complex. A similar method was performed with a different counteranion, leading to a colloidal solution of the microcrystals (MCs) with brilliant yellow phosphorescence and a quantum yield of 26% in n-hexane. Luminescence patterning of the NCs and MCs was also achieved successfully by electrophoretic deposition onto an indium tin oxide (ITO)-coated glass substrate, resulting in characteristic luminescence patterns on the ITO substrates with relatively high photoluminescence quantum yields.
采用再沉淀法制备了由阳离子 Au(I) 配合物组成的纳米晶体 (NCs)，所得 NCs 的胶体溶液在正己烷中表现出明亮的绿色磷光，量子产率为 83%。通过透射电子显微镜观察和能量色散 X 射线能谱的元素分析对制备的 NCs 进行了表征。得到的 Au(I) NCs 是具有 200-400nm 直径的任意形状的颗粒。选区电子衍射和 X 射线衍射测量显示出归因于 Au(I) 配合物体相晶体结构的特征衍射图案。采用不同的抗衡阴离子进行了类似的方法，得到了胶体溶液的微晶体 (MCs)，在正己烷中具有明亮的黄色磷光，量子产率为 26%。通过电泳沉积到氧化铟锡 (ITO) 涂覆的玻璃基底上，成功地对 NCs 和 MCs 进行了发光图案化，在 ITO 基底上得到了具有相对较高光致发光量子产率的特征发光图案。
