Fu Xuemei, Xiao Zuoyi, Yang Qianyu, Li Zhonghai, Li Yixuan, Zhang Qiang, Liu Songgang
{"title":"Size-Focusing Synthetic Process and Properties of [Au25Cu8(S-Adam)19(PPh3)5]+ Nanocluster","authors":"Fu Xuemei, Xiao Zuoyi, Yang Qianyu, Li Zhonghai, Li Yixuan, Zhang Qiang, Liu Songgang","doi":"10.1134/s0036023623603148","DOIUrl":null,"url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Compared with nanoparticles, nanoclusters have some unique properties, such as definite structure, surface effect, and quantum size effect. In this work, AuCu nanocluster protected by triphenylphosphine and adamantane mercaptan is synthesized and it is formulated to [Au<sub>25</sub>Cu<sub>8</sub>(S-Adam)<sub>19</sub>(PPh<sub>3</sub>)<sub>5</sub>]<sup>+</sup>. With the characterization of UV-Vis absorption spectrum and Matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF), the synthesis of [Au<sub>25</sub>Cu<sub>8</sub>(S-Adam)<sub>19</sub>(PPh<sub>3</sub>)<sub>5</sub>]<sup>+</sup> nanocluster is demonstrated to be a size-focusing process: polydisperse Au<sub><i>m</i></sub>Cu<sub><i>n</i></sub>(S-Adam)<sub><i>x</i></sub>(PPh<sub>3</sub>)<sub><i>y</i></sub> precursor with a size ranging from 900 Da to 2000 Da generates firstly and it transforms into [Au<sub>25</sub>Cu<sub>8</sub>(S-Adam)<sub>19</sub>(PPh<sub>3</sub>)<sub>5</sub>]<sup>+</sup> nanocluster in 3 days. TEM image demonstrates it is monodisperse distributing between 0.84 and 2.0 nm with an average size of 1.4 nm. TG shows a weight loss of 38.70% with ligands continuously breaking down between 200 and 330°C. Thermal stability test shows that it keeps well thermal stability at 40°C: the peaks of UV-Vis absorption spectrum gradually get weaken at 6 h and completely become a decaying curve at 8 h. This work provides a simple method to prepare AuCu nanocluster and affords new ideas for preparing Au-based alloy nanoclusters.</p>","PeriodicalId":762,"journal":{"name":"Russian Journal of Inorganic Chemistry","volume":"144 1","pages":""},"PeriodicalIF":1.8000,"publicationDate":"2024-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Russian Journal of Inorganic Chemistry","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1134/s0036023623603148","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, INORGANIC & NUCLEAR","Score":null,"Total":0}
引用次数: 0
Abstract
Compared with nanoparticles, nanoclusters have some unique properties, such as definite structure, surface effect, and quantum size effect. In this work, AuCu nanocluster protected by triphenylphosphine and adamantane mercaptan is synthesized and it is formulated to [Au25Cu8(S-Adam)19(PPh3)5]+. With the characterization of UV-Vis absorption spectrum and Matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF), the synthesis of [Au25Cu8(S-Adam)19(PPh3)5]+ nanocluster is demonstrated to be a size-focusing process: polydisperse AumCun(S-Adam)x(PPh3)y precursor with a size ranging from 900 Da to 2000 Da generates firstly and it transforms into [Au25Cu8(S-Adam)19(PPh3)5]+ nanocluster in 3 days. TEM image demonstrates it is monodisperse distributing between 0.84 and 2.0 nm with an average size of 1.4 nm. TG shows a weight loss of 38.70% with ligands continuously breaking down between 200 and 330°C. Thermal stability test shows that it keeps well thermal stability at 40°C: the peaks of UV-Vis absorption spectrum gradually get weaken at 6 h and completely become a decaying curve at 8 h. This work provides a simple method to prepare AuCu nanocluster and affords new ideas for preparing Au-based alloy nanoclusters.
期刊介绍：
Russian Journal of Inorganic Chemistry is a monthly periodical that covers the following topics of research: the synthesis and properties of inorganic compounds, coordination compounds, physicochemical analysis of inorganic systems, theoretical inorganic chemistry, physical methods of investigation, chemistry of solutions, inorganic materials, and nanomaterials.
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