Synthesis of High Yield Au-21(SR)(15) Nanoclusters
Ren Xiuqing1,2; Lin Xinzhang1,3; Fu Xuemei1,3; Liu Chao1; Yan Jinghui2; Huang Jiahui1
KeywordGold Nanocluster Au-21(S-adam)(15) High-yield
Indexed BySCI
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Physical
WOS Research AreaChemistry
AbstractIn recent years, Au nanoclusters have attracted much attention as new nanomaterials, which contain several to two hundred Au atoms and are protected by ligands. The structures and properties of Au nanoclusters are usually sensitive to the particle size due to quantum confinement effect. Au nanoclusters have been applied to different fields, such as optical properties, catalysis, and biology. There are two common methods for the synthesis of atomically precise Au nanoclusters: "size focusing" and "ligand exchange". Although a series of Au nanocluster have been obtained via "size focusing" and "ligand exchange", obtaining high yield of such Au nanoclusters is a challenge. Au-21(S-Adam)(15) was previously synthesized via etching Au-18 nanoclusters with excess thiols, and its crystal structure was determined by X-ray diffraction crystallography; however, the yield of Au nanoclusters was low. In this study, we prepared Au-21(S-Adam)(15) in high yield via conversion of Au-23(S-Adam)(16) to Au-21(S-Adam)(15). Firstly, Au-23(S-Adam)(16) nanoclusters were synthesized using adamantanethiols(HS-Adam) as the protecting ligand and HAuCl4 as the gold resource in ethyl acetate solvent. Au-23(S-Adam)(16) were further etched with excess thiols at room temperature. After reacting for 30 min, highly pure Au-21(S-Adam)(15), with high yield of similar to 20% based on HAuCl4 precursor, were successfully prepared. Au-23(S-Adam)(16) and Au-21(S-Adam)(15) were characterized by electrospray ionization (ESI), UV-Vis absorption spectroscopy, matrix-assisted laser desorption ionization (MALDI) mass spectrometry, and thermogravimetric analysis (TGA). ESI-MS and UV-Vis spectra confirm the high purity of the Au-23(S-Adam)(16). After conversion, UV-Vis spectra show the absorption peaks of Au-21(S-Adam)(15) at 700, 540, 435 and 380 nm. The MALDI-MS of Au-21(S-Adam)(15) shows several peaks at 6502, 6471, 6106, 5411, and 5048, assigned to Au-21(S-Adam)(14S), Au-21(S-Adam)(14), Au-20(S-Adam)(13), Au-19(S-Adam)(10), and Au-18(S-Adam)(9), respectively. The fragments of Au nanoclusters were produced by the strong laser intensity, which easily removes carbon tails from HS-Adam. Thermogravimetric analysis (TGA) was also performed to check the purity of Au-21(S-Adam)(15) nanoclusters. The TGA curve shows a weight loss of 42% (expected value, 38%). UV-Vis absorption spectroscopy was performed to track the conversion of Au-23(S-Adam)(16) to Au-21(S-Adam)(15). It was found that Au-23(S-Adam)(16) can convert to Au-21(S-Adam)(15) with a conversion efficiency of up to 97%, using excess thiols at room temperature within 30 min. In general, we successfully synthesized highly pure Au-21(S-Adam)(15) nanoclusters, with high yield of similar to 20% based on HAuCl4, by etching Au-23(S-Adam)(16) with excess thiols at room temperature.
WOS IDWOS:000429142800017
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Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorLiu Chao; Huang Jiahui
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Gold Catalysis Res Ctr, Dalian 116023, Liaoning, Peoples R China
2.Changchun Univ Sci & Technol, Sch Chem & Environm Engn, Changchun 130022, Jilin, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Ren Xiuqing,Lin Xinzhang,Fu Xuemei,et al. Synthesis of High Yield Au-21(SR)(15) Nanoclusters[J]. ACTA PHYSICO-CHIMICA SINICA,2018,34(7):825-829.
APA Ren Xiuqing,Lin Xinzhang,Fu Xuemei,Liu Chao,Yan Jinghui,&Huang Jiahui.(2018).Synthesis of High Yield Au-21(SR)(15) Nanoclusters.ACTA PHYSICO-CHIMICA SINICA,34(7),825-829.
MLA Ren Xiuqing,et al."Synthesis of High Yield Au-21(SR)(15) Nanoclusters".ACTA PHYSICO-CHIMICA SINICA 34.7(2018):825-829.
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