The effects of surface ligands and counter cations on the stability of anionic thiolated M_(12)Ag_(32)(M=Au,Ag) nanoclusters

作     者：Xin Zhang Hua-Yan Yang Xiao-Jing Zhao Yu Wang Nan-Feng Zheng 

作者机构：State Key Laboratory for Physical Chemistry of Solid SurfacesXiamen University Department of ChemistryCollege of Chemistry and Chemical EngineeringXiamen University 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2014年第25卷第6期

页      面：839-843页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 081401[工学-岩土工程] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 0814[工学-土木工程] 

基　　金：the MOST of China(No.2011CB932403) the NSFC of China(Nos.21131005,21390390,21333008) for financial support 

主　　题：Nanoclusters Stability Ligand effect Noble metal 

摘      要：The stabilities of [M12Ag32（SR）30]4- （M = Ag, Au and SR = SPhF2, SPhCF3, SPhF） clusters having the same structure but different surface ligands or counter cations were systematically studied. It was clearly revealed that a subtle structural change in the surface ligands or counter cations could significantly alter the overall stability of [M12Ag32（SR）30]4 although they all had an electronic structure of 18-electron superatom shell closure. SPhF2 was found as a better surface ligand than SPhCF3 or SPhF to stabilize [M12Ag32（SR）30]4-. And the use of more bulky [（PPhj）2N]＋ as the counter cations was revealed to be more deleterious to the overall stability of [M12Ag32（SR）30]4- clusters than PPh4＋. [Au12Ag32（SR）30]4- was much more stable than [Ag44（SR）30]4 with the same surface ligands and counter cations. An exceptional stability was observed on （PPh4）4[Au12Ag32（SPhF2）30] which was stable in DMF for more than 8 days in air at 80 ℃. More research efforts are still needed to deeply understand why a small structural change could result in a significant change in the stability of noble metal nanoclusters.