Liao Lingwen, Wang Chengming, Zhuang Shengli, Yan Nan, Zhao Yan, Yang Ying, Li Jin, Deng Haiteng, Wu Zhikun
Key Laboratory of Materials Physics, Anhui Key Laboratory of Nanomaterials and Nanotechnology, CAS Center for Excellence in Nanoscience, Institute of Solid State Physics, Chinese Academy of Sciences, Hefei, 230031, P. R. China.
Institute of Physical Science and Information Technology, Anhui University, Hefei, Anhui, 230601, P. R. China.
Angew Chem Int Ed Engl. 2020 Jan 7;59(2):731-734. doi: 10.1002/anie.201912090. Epub 2019 Nov 18.
Kernel atoms of Au nanoclusters are packed layer-by-layer along the [001] direction with every full (001) monolayer composed of 8 Au atoms (Au unit) in nanoclusters with formula of Au (TBBT) (n is the number of Au units; TBBTH=4-tert-butylbenzenelthiol). It is unclear whether the kernel atoms can be stacked in a defective-layer way along the [001] direction during growth of the series of nanoclusters and how the kernel layer number affects properties. Now, a nanocluster is synthesized that is precisely characterized by mass spectrometry and single-crystal X-ray crystallography, revealing a layer stacking mode in which a half monolayer composed of 4 atoms (Au unit) is stacked on the full monolayer along the [001] direction. The size and the odevity of the kernel layer number influence the properties (polarity, photoluminescence) of gold nanoclusters. The obtained nanocluster extends the previous formula from Au (TBBT) to Au (TBBT) (n is the number of Au units).
金纳米团簇的内核原子沿[001]方向逐层堆积，在化学式为Au(TBBT)（n为Au单元的数量；TBBTH = 4-叔丁基苯硫醇）的纳米团簇中，每个完整的(001)单层由8个Au原子（Au单元）组成。目前尚不清楚在这一系列纳米团簇的生长过程中，内核原子是否会沿[001]方向以缺陷层的方式堆积，以及内核层数如何影响其性质。现在，合成了一种纳米团簇，通过质谱和单晶X射线晶体学对其进行了精确表征，揭示了一种层堆积模式，即由4个原子（Au单元）组成的半单层沿[001]方向堆积在完整单层上。内核层数的大小和奇偶性会影响金纳米团簇的性质（极性、光致发光）。所获得的纳米团簇将之前的化学式从Au(TBBT)扩展为Au(TBBT)（n为Au单元的数量）。
