Selective formation of [Au23(SPhtBu)17]0, [Au26Pd(SPhtBu)20]0 and [Au24Pt(SC2H4Ph)7(SPhtBu)11]0 by controlling ligand-exchange reaction. Issue 19 (12th April 2022)

• Record Type: Journal Article
• Authors: Negishi, Yuichi; Horihata, Hikaru; Ebina, Ayano; Miyajima, Sayuri; Nakamoto, Mana; Ikeda, Ayaka; Kawawaki, Tokuhisa; Hossain, Sakiat
• Is Part Of: Chemical science. Volume 13:Issue 19(2022)
• Page Start: 5546
• Page End: 5556
• Publication Date: 2022-04-12
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/d2sc00423b
• Languages: English
• ISSNs: 2041-6520

Abstract

Abstract : This study succeeded in obtaining three new thiolate protected metal nanoclusters by changing the ligand-exchange condition from previous studies. Abstract : To use atomically precise metal nanoclusters (NCs) in various application fields, it is essential to establish size-selective synthesis methods for the metal NCs. Studies on thiolate (SR)-protected gold NCs (Au n (SR) m NCs) revealed that the atomically precise Au n (SR) m NC, which has a different chemical composition from the precursor, can be synthesized size-selectively by inducing transformation in the framework structure of the metal NCs by a ligand-exchange reaction. In this study, we selected the reaction of [Au25 (SC2 H4 Ph)18 ] − (SC2 H4 Ph = 2-phenylethanethiolate) with 4- tert -butylbenzenethiol ( t BuPhSH) as a model ligand-exchange reaction and attempted to obtain new metal NCs by changing the amount of thiol, the central atom of the precursor NCs, or the reaction time from previous studies. The results demonstrated that [Au23 (SPh t Bu)17 ] 0, [Au26 Pd(SPh t Bu)20 ] 0 (Pd = palladium) and [Au24 Pt(SC2 H4 Ph)7 (SPh t Bu)11 ] 0 (Pt = platinum) were successfully synthesized in a high proportion. To best of our knowledge, no report exists on the selective synthesis of these three metal NCs. The results of this study show that a larger variety of metal NCs could be synthesized size-selectively than at present if the ligand-exchange reaction is conducted while changing the reaction conditions and/or the central atoms of the precursor metal NCs from previous studies.