Cd-driven surface reconstruction and photodynamics in gold nanoclusters.

Cd-driven surface reconstruction and photodynamics in gold nanoclusters.
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金纳米团簇中镉驱动的表面重建和光动力学

DOI:
10.1039/d0sc05163b
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发表时间:
2021-01-05
期刊:
影响因子:
8.4
通讯作者:
Zhu Y
Zhu Y
中科院分区:
化学1区
文献类型:
--
作者:
Liu X;Yao G;Cheng X;Xu J;Cai X;Hu W;Xu WW;Zhang C;Zhu Y

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以原子精密的金纳米团簇为起始单元,用其他金属取代纳米团簇中的一个或多个金原子已成为提高催化性能和其他性能的金属协同效应的有效策略。然而,到目前为止,对于如何设计基于金的纳米团簇以优化协同作用仍然缺乏详细的见解,因为在不改变其他部分的情况下,表面金(或核金)和进入的杂原子之间的原子级交换是相当具有挑战性的。在这里,我们报道了一种CD驱动的Au44(DMBT)28(DMBT=3,5-二甲基苯硫醇)的重建,其中四个Au2(DMBT)3基序被两个Au5Cd2(DMBT)12基序精确地替换,形成了保留面心立方内核的Au38Cd4(DMBT)30。通过表面和电子结构的双重修饰,Au38Cd4(DMBT)30纳米团簇与母体Au44(DMBT)28纳米团簇相比,表现出明显的激子行为和光催化性能。
With atomically precise gold nanoclusters acting as a starting unit, substituting one or more gold atoms of the nanocluster with other metals has become an effective strategy to create metal synergy for improving catalytic performances and other properties. However, so far detailed insight into how to design the gold-based nanoclusters to optimize the synergy is still lacking, as atomic-level exchange between the surface-gold (or core-gold) and the incoming heteroatoms is quite challenging without changing other parts. Here we report a Cd-driven reconstruction of Au44(DMBT)28 (DMBT = 3,5-dimethylbenzenethiol), in which four Au2(DMBT)3 staples are precisely replaced by two Au5Cd2(DMBT)12 staples to form Au38Cd4(DMBT)30 with the face-centered cubic inner core retained. With the dual modifications of the surface and electronic structure, the Au38Cd4(DMBT)30 nanocluster exhibits distinct excitonic behaviors and superior photocatalytic performances compared to the parent Au44(DMBT)28 nanocluster.
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