Au146（p-MBA）57的亚原子分辨率的MicroED结构揭示了孪生的FCC簇
MicroED structure of Au146(p-MBA)57 at subatomic resolution reveals a twinned FCC cluster
摘要：
求解金属团簇的原子结构是理解其光学、电子和化学性质的基础。我们报道了Au $_{\text{146}}$（p-MBA）$_{\text{57}}$的亚原子分辨率（0.85 μ m）电子衍射（MicroED）和原子分辨率X射线衍射的结构。146个金原子可以分解成两个组成部分，包括119个核心原子和27个外围原子。核心原子组织在一个孪生FCC结构，而表面金原子遵循C $_{2}$旋转对称轴平分的孪生平面。57 p-MBA的保护层完全包围簇，并包含桥接、单体和二聚体钉合基序。Au $_{\text{146}}$（p-MBA）$_{\text{57}}$是观察到的表现出块状FCC结构的最大簇以及表现出堆垛层错的最小金颗粒。
英文摘要：
Solving the atomic structure of metallic clusters is fundamental to understanding their optical, electronic, and chemical properties. We report the structure of Au$_{\text{146}}$(p-MBA)$_{\text{57}}$ at subatomic resolution (0.85 Å) using electron diffraction (MicroED) and atomic resolution by X-ray diffraction. The 146 gold atoms may be decomposed into two constituent sets consisting of 119 core and 27 peripheral atoms. The core atoms are organized in a twinned FCC structure whereas the surface gold atoms follow a C$_{2}$ rotational symmetry about an axis bisecting the twinning plane. The protective layer of 57 p-MBAs fully encloses the cluster and comprises bridging, monomeric, and dimeric staple motifs. Au$_{\text{146}}$(p-MBA)$_{\text{57}}$ is the largest cluster observed exhibiting a bulk-like FCC structure as well as the smallest gold particle exhibiting a stacking fault.
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