Crystal Structure of Barrel-Shaped Chiral Au130(p-MBT)50 Nanocluster
Crystal Structure of Barrel-Shaped Chiral Au130(p-MBT)50 Nanocluster
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DOI：
10.1021/jacs.5b05378
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发表时间：
2015-08-19
影响因子：
15
通讯作者：
Jin, Rongchao
中科院分区：
文献类型：
--
作者：
Chen, Yuxiang;Zeng, Chenjie;Jin, Rongchao
我们报告了一个大的金纳米团簇的结构测定，该团簇被配制为Au-130（p-MBT）（50），其中p-MBT是4-甲基苯硫酚。该纳米团簇是以四壳层的方式构建的，55个金原子组装成一个两壳层的Ino十面体。表面仅由-S-Au-S-钉状基序保护，其在桶形Au-105内核的表面上自组织成五个波纹状条纹。Au-130（p-MBT）（50）可被视为Au-102（SR）（44）的伸长形式。Au-130（p-MBT）（50）结构与最近发现的二十面体Au-133（p-TBBT）（52）纳米团簇的比较（其中p-TBBT = 4-叔丁基苯硫酚盐）揭示了一个有趣的现象，即苯硫酚盐对位的微妙配体效应可以显著影响金原子堆积结构，即从5倍孪晶的Au-55十面体到20倍孪晶的Au-55二十面体。
We report the structure determination of a large gold nanocluster formulated as Au-130(p-MBT)(50), where p-MBT is 4-methylbenzenethiolate. The nanocluster is constructed in a four-shell manner, with 55 gold atoms assembled into a two-shell Ino decahedron. The surface is protected exclusively by -S-Au-S- staple motifs, which self-organize into five ripple-like stripes on the surface of the barrel-shaped Au-105 kernel. The Au-130(p-MBT)(50) can be viewed as an elongated version of the Au-102(SR)(44). Comparison of the Au-130(p-MBT)(50) structure with the recently discovered icosahedral Au-133(p-TBBT)(52) nano cluster (where p-TBBT = 4-tert-butylbenzenethiolate) reveals an interesting phenomenon that a subtle ligand effect in the para-position of benzenethiolate can significantly affect the gold atom packing structure, i.e. from the 5-fold twinned Au-55 decahedron to 20-fold twinned Au-55 icosahedron.