Price Ryan C, Whetten Robert L
Department of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332-0400, USA.
J Am Chem Soc. 2005 Oct 12;127(40):13750-1. doi: 10.1021/ja053968+.
We report a method to generate and isolate 22 and 29 kDa core mass gold:benzenethiolate monolayer-protected cluster (MPC) molecules and a subsequent reaction to yield [(octyl)4N]2[Au44(SC6H5)28] (8.7 kDa core) clusters from these materials. Characterization methods for these 1.0-1.7 nm molecules include vibrational, electronic, 1H NMR, and mass spectrometry, as well as powder X-ray diffraction. The clusters are anionic and charge balanced by tetraoctylammonium. They possess size-dependent optical absorbance bands consistent with size-quantized gold cores and are susceptible to electrochemical degradation in polar organic solvents. To our knowledge this is the first report of all arylthiolate gold MPC molecules, and they represent ideal materials for crystallization and total structural characterization.
我们报告了一种生成并分离22 kDa和29 kDa核心质量的金：苯硫醇单层保护簇（MPC）分子的方法，以及随后从这些材料中生成[(辛基)4N]2[Au44(SC6H5)28]（8.7 kDa核心）簇的反应。这些1.0 - 1.7 nm分子的表征方法包括振动光谱、电子光谱、1H NMR、质谱以及粉末X射线衍射。这些簇是阴离子型的，由四辛基铵进行电荷平衡。它们具有与尺寸量子化的金核一致的尺寸依赖性光吸收带，并且在极性有机溶剂中易受电化学降解。据我们所知，这是关于所有芳硫醇金MPC分子的首次报道，它们是用于结晶和全结构表征的理想材料。
