Self-assembly Palladacycle Thiophene Imine Monolayer Investigating on Catalytic Activity and Mechanism for Coupling Reaction

查看全文 作　　者：LI [1]Lun;XUE [1]Xiaoxia;SUN [1,2]Yimeng;ZHAO [1]Wuduo;LI [1]Tiesheng;LIU [2,3]Minghua;WU [1]Yangjie 机构地区：[1]College of Chemistry,Zhengzhou University,Zhengzhou 450001,P.R.China;[2]Henan Institute of Advanced Technology,Zhengzhou University,Zhengzhou 450001,P.R.China;[3]Beijing National Laboratory,for Molecular Science,Institute of Chemistry,Chinese Academy of Sciences,Beijing 100190,P.R.China 出　　处：《Chemical Research in Chinese Universities》索引2020年第36卷第5期,共8页 基　　金：Supported by the National Natural Science Foundation of China(No.21861132002);the Natural Science Foundation of Henan Province,China(No.192102210046)。 摘　　要：An ordered cyclopallated thiophene imine self-assembly monolayer(Si@Pd3TI)was designed and fkbri-cated.It was characterized by water contact angle(WCA),ultraviolet-visible spectroscopy(UV),cyclic voltanmie-try(CV),infrared(IR)spectrum,atomic force microscopy(AFM)and X-ray photoelectron spectroscopy(XPS).Its catalytic performance for Suzuki coupling reaction and catalytic mechanism were systematic investigated.Si@Pd3TI was validated as a heterogeneous catalyst identified by poisoning tests,hot filtration test and three-phase test.The heterogeneous catalytic mechanism was investigated by WCA,UY Raman spectrum(RS),AFM,XPS and density functional theory(DFT).The catalytic mechanism proceeded via surface-catalysis process,on which the Pd(Ⅱ)/Pd(Ⅰ)/Pd(0)synergistic active center acted likely as'multimetallic cluster'.It played a great role for cataly-zing coupling reaction,in which the real active species was Pd(Ⅰ). 关 键 词：Cyclopalladated imine THIOPHENE Coupling reaction Self-assembly monolayer Heterogeneous Synergistic