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Cd-driven surface reconstruction and photodynamics in gold nanoclusters
Chemical Science ( IF 7.6 ) Pub Date : 2021-1-5 , DOI: 10.1039/d0sc05163b
Xu Liu 1 , Guo Yao 2 , Xinglian Cheng 1 , Jiayu Xu 1 , Xiao Cai 1 , Weigang Hu 1 , Wen Wu Xu 3 , Chunfeng Zhang 2 , Yan Zhu 1
Affiliation  

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.

中文翻译:


金纳米团簇中镉驱动的表面重建和光动力学



以原子级精确的金纳米团簇作为起始单元,用其他金属取代纳米团簇的一个或多个金原子已成为产生金属协同作用以改善催化性能和其他性能的有效策略。然而,到目前为止,仍然缺乏对如何设计金基纳米团簇以优化协同作用的详细了解,因为在不改变其他部分的情况下,表面金(或核心金)和进入的杂原子之间的原子级交换相当具有挑战性。 。在这里,我们报告了Au 44 (DMBT) 28 (DMBT = 3,5-二甲基苯硫酚)的Cd驱动重建,其中四个Au 2 (DMBT) 3钉书钉被两个Au 5 Cd 2 (DMBT) 12钉书钉精确替换,以实现形成Au 38 Cd 4 (DMBT) 30并保留面心立方内核。通过表面和电子结构的双重修饰,与母体Au 44 (DMBT) 28纳米团簇相比,Au 38 Cd 4 (DMBT) 30纳米团簇表现出独特的激子行为和优异的光催化性能。
更新日期:2021-01-21
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