Precisely tailoring the structure of bimetal nanoclusters(NCs)at the atomic level has been proven to be an effective way to tune their physicochemical properties;however,achieving this remains challenging.Herein,the r...Precisely tailoring the structure of bimetal nanoclusters(NCs)at the atomic level has been proven to be an effective way to tune their physicochemical properties;however,achieving this remains challenging.Herein,the regulation from the reported Ag_(26)Pt(2-EBT)_(18)(PPh_(3))_(6)(Ag_(26)Pt)to Ag_(16)Pt(2-EBT)_(6)(dppm)_(4)Cl_(2)(Ag_(16)Pt;2-EBTH=2-ethylbenzenethiol;dppm=bis-(diphenylphosphino)methane)NC was instantaneously(within one minute)realized through an asymmetrical pseudo-ligand exchange strategy.Single crystal X-ray crystallography(SCXC)combined with X-ray photoelectron spectroscopy(XPS)and thermogravimetric analysis(TGA)confirmed its composition and structure.The target Ag_(16)Pt NC consists of a Pt@Ag_(12) icosahedral core capped by a ligand shell of a pair of dimetric-SR-Ag-SR-Ag-SR-staple motifs,four dppm ligands,and two chlorine atoms.Their geometrical,electronic and crystallographical structures were comparatively investigated before and after regulation,which also provides some clues for understanding the blueshift of the emission center(Ag_(26)Pt:845 nm vs.Ag_(16)Pt:675 nm).This work provides important insights into the regulation of structures and photoluminescence of bimetal NCs protected by co-ligands.展开更多
基金supported by the National Natural Science Foundation of China(22201225,22371108 and 21971246)Taishan Scholar Foundation of Shandong Province(tsqn202211242)and the Chunhui Program of the Ministry of Education of China(HZKY20220463)+5 种基金China Postdoctoral Science Foundation(2023M733539)XiangJiang Scholars Scheme Program(XJ2023006)Postdoctoral Researcher Scientific Activity Funding Project in Anhui Province(2023A660)Scientific Program Funded by the Shaanxi Provincial Education Department(23JK0456)Scientific and Technological Plan Project of Xi’an Beilin District(GX2310)Scientific and Technological Plan Project of Xi’an Science and Technology Bureau(24GXFW0017).
文摘Precisely tailoring the structure of bimetal nanoclusters(NCs)at the atomic level has been proven to be an effective way to tune their physicochemical properties;however,achieving this remains challenging.Herein,the regulation from the reported Ag_(26)Pt(2-EBT)_(18)(PPh_(3))_(6)(Ag_(26)Pt)to Ag_(16)Pt(2-EBT)_(6)(dppm)_(4)Cl_(2)(Ag_(16)Pt;2-EBTH=2-ethylbenzenethiol;dppm=bis-(diphenylphosphino)methane)NC was instantaneously(within one minute)realized through an asymmetrical pseudo-ligand exchange strategy.Single crystal X-ray crystallography(SCXC)combined with X-ray photoelectron spectroscopy(XPS)and thermogravimetric analysis(TGA)confirmed its composition and structure.The target Ag_(16)Pt NC consists of a Pt@Ag_(12) icosahedral core capped by a ligand shell of a pair of dimetric-SR-Ag-SR-Ag-SR-staple motifs,four dppm ligands,and two chlorine atoms.Their geometrical,electronic and crystallographical structures were comparatively investigated before and after regulation,which also provides some clues for understanding the blueshift of the emission center(Ag_(26)Pt:845 nm vs.Ag_(16)Pt:675 nm).This work provides important insights into the regulation of structures and photoluminescence of bimetal NCs protected by co-ligands.
