Transformation of [Au25(4-PyET)18]– into [Au20(4-PyET)14CN]– Induced by Atmospheric Pressure Plasma Irradiation in Methanol

IF 3.6 4区 化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR
Lewei Wang, Kiichirou Koyasu, Tatsuya Tsukuda
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引用次数: 0

Abstract

The transformation of well-characterized, ligand-protected gold nanoclusters (AuNCs) is a promising approach for the targeted synthesis of novel AuNCs. Our group has previously reported that [MAu8(PPh3)8]2+ (M = Au+, Pd) in methanol was transformed into unprecedented NCs by incorporating one or two AuCN units through atmospheric pressure plasma (APP) irradiation. In order to broaden the scope of the APP-based transformation, the reaction on a prototypical thiolate-protected AuNCs [Au25(SR)18] was studied. APP irradiation of [Au25(4-PyET)18] (4-PyET = 4-pyridineethanethiol) resulted in a transformation to [Au20(4-PyET)14CN], accompanied by oxidation, while [Au25(p-MBA)18] (p-MBA = 4-mercaptobenzoic acid) was transformed into larger plasmonic Au nanoparticles. The geometric and electronic structures of a simplified model [Au20(SCH3)14CN] were investigated by density functional theory (DFT) calculations. It was proposed that [Au20(SCH3)14CN] has an oblate Au10 superatomic core protected by two Au2(4-PyET)3 and two Au3(4-PyET)4 oligomers.

常压等离子体辐照诱导[Au25(4-PyET)18] -转化为[Au20(4-PyET)14CN] -
表征良好、配体保护的金纳米团簇(AuNCs)的转化是一种有前途的靶向合成新型AuNCs的方法。本课课组此前曾报道,通过大气压等离子体(APP)照射,将一个或两个AuCN单元纳入甲醇中,[MAu8(PPh3)8]2+ (M = Au+, Pd)转化为前所未有的nc。为了扩大基于app的转化范围,研究了一种典型的硫代酸保护的aunc [Au25(SR)18] -上的反应。[Au25(4-PyET)18] - (4-PyET = 4-吡啶乙烷硫醇)在APP照射下转化为[Au20(4-PyET)14CN] -并伴有氧化,而[Au25(p-MBA)18] - (p-MBA = 4-巯基苯甲酸)转化为较大的等离子体金纳米颗粒。采用密度泛函理论(DFT)研究了简化模型[Au20(SCH3)14CN] -的几何结构和电子结构。提出了[Au20(SCH3)14CN] -具有由两个Au2(4- pyet)3和两个Au3(4- pyet)4低聚物保护的扁圆Au10超原子核。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Cluster Science
Journal of Cluster Science 化学-无机化学与核化学
CiteScore
6.70
自引率
0.00%
发文量
166
审稿时长
3 months
期刊介绍: The journal publishes the following types of papers: (a) original and important research; (b) authoritative comprehensive reviews or short overviews of topics of current interest; (c) brief but urgent communications on new significant research; and (d) commentaries intended to foster the exchange of innovative or provocative ideas, and to encourage dialogue, amongst researchers working in different cluster disciplines.
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