M1AgxAu24xSR180M=CdHg三金属纳米团簇的合成及Au24Ag46C4H9S32纳米团簇催化能探索.docxVIP

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M1AgxAu24xSR180M=CdHg三金属纳米团簇的合成及Au24Ag46C4H9S32纳米团簇催化能探索.docx

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M1AgxAu24xSR180M=CdHg三金属纳米团簇的合成及Au24Ag46C4H9S32纳米团簇催化能探索

Abstract Abstract In recent years，the noble metals nanoclusters have been attracted considerable research interest as an emerging discipline in the nanoscience by scientists． Atomically precise alloy nanoclusters have recently attracted considerable research interest．These ultrasmall nanoclusters ale small enough to confine their electrons and exhibit molecule—like properties．Owing to the synergistic effects in such systems，the stability and catalytic and opticalproperties are oRen dramatically changedThrough know about noble metals nano clusters gradually thorough bY researchers，the preparation method of noble metal nano clusters has been quite mature by us．Au nano clusters protected by thiolate have been extensively studied and a number of the gold-thiolate nanoclusters have been synthetized．Due to the backward of characterization method about the gold nano clusters which protected by thiolate，the characterization method of crystal structure of the gold——thiolate nanoclusters is a difficult problem．In 2008，the gold nanoclustcr Aul02 protected by thiolate have been synthetic and reported by Jadizinsky．It is to note that，this crystal structure of gold nanoclusters is reported for the first time in the gold nanoclusters which protected by thiolate．And then，the kinds of crystal structure of gold nanoclusters have been reported more and more．To date，a number of crystal structures of the gold-thiolate nanoclusters such as Aul s，Au20，Au23，Au24，Au25，AuEs，Auto，Au36，Au3s，Au40，Au44， Au52，Aul02，Aul 30，and AUl 33 have been characterized．On the basis of known the crystal structure of gold nanoclusters，the properties and applications of gold nanoclusters have a wide range of research．And Au25 have been attracted more interests of scientists due to it have a particularity structure and more stability． Detailed content iS as follows： 1．A metal exchange method for thiolate-protected tfi-metal M1AgxAu24-x(SR)180(M =Cd／Hg)nanoclusters．In this chapter，we report the first thiolate-