Tuning the Magic Size of Atomically Precise Gold Nanoclusters via Isomeric Methylbenzenethiols
Tuning the Magic Size of Atomically Precise Gold Nanoclusters via Isomeric Methylbenzenethiols
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DOI：
10.1021/acs.nanolett.5b01122
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发表时间：
2015-05-01
期刊：
影响因子：
10.8
通讯作者：
Jin, Rongchao
中科院分区：
文献类型：
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作者：
Chen, Yuxiang;Zeng, Chenjie;Jin, Rongchao
为了控制原子精确的金纳米团簇的魔术尺寸，我们设计了一种新的策略，通过探索对、间、邻甲基苯硫醇(MBT)成功地制备出纯Au-130(p-MET)(50)、Au-104(m-MBT)(41)和Au-40(o-MBT)(24)纳米团簇。减少的位置顺序与甲基对界面Au-S键的阻碍增加相一致。在其他相似的反应条件下，配体结构的细微变化可以导致截然不同的魔术尺寸，这在硫代保护的金纳米团簇的合成中确实是第一次观察到。这些纳米团簇是高度稳定的，因为它们是在80-90摄氏度的苛刻尺寸聚焦条件下在过量硫醇和空气(即不排除氧气)的存在下合成的。
Toward controlling the magic sizes of atomically precise gold nanoclusters, herein we have devised a new strategy by exploring the para-, meta-, ortho-methylbenzenethiol (MBT) for successful preparation of pure Au-130(p-MET)(50), Au-104(m-MBT)(41) and Au-40(o-MBT)(24) nanoclusters. The decreasing site sequence is in line with the increasing hindrance of the methyl group to the interfacial Au-S bond. That the subtle change of ligand structure can result in drastically different Magic sizes under otherwise similar reaction conditions is indeed for the first time observed in the synthesis of thiolate-protected gold nanoclusters. These nanoclusters are highly stable as they are synthesized under harsh size-focusing conditions at 80-90 degrees C in the presence of excess thiol and air (i.e., without exclusion of oxygen).