From n-alkane to polyacetylene on Cu(110):Linkage modulation in chain growth  

作　　者：Zhengming Hao Junjie Zhang Miao Xie Xuechao Li Lina Wang Ye Liu Kaifeng Niu Junbo Wang Luying Song Tao Cheng Haiming Zhang Lifeng Chi 

机构地区：[1]Institute of Functional Nano and Soft Materials(FUNSOM)and Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices,Soochow University,Suzhou 215123,China [2]Department of Physics,Chemistry and Biology,Linköping University,Linköping 58183,Sweden

出　　处：《Science China Chemistry》2022年第4期733-739,共7页中国科学（化学英文版）

基　　金：financially supported by the National Natural Science Foundation of China(21790053,and 51821002);the Ministry of Science and Technology(2017YFA0205002);the Collaborative Innovation Center of Suzhou Nano Science&Technology,the Priority Academic Program Development of Jiangsu Higher Education Institutions(PAPD);the 111 project。

摘　　要：Direct coupling or transformation of inert alkanes based on the selective C-H activation is of great importance for both chemistry and chemical engineering.Here,we report the coupling of polyenes that are transformed from n-dotriacontane(n-C_(22)H_(66))through on-surface cascade dehydrogenation on Cu(110)surface,leading to the formation of polyacetylene(PA).Three distinct linkages have been resolved by scanning tunneling microscope(STM)and noncontact atomic force microscope(nc-AFM).Apart from the α-type linkage which is the stemless coupling of the terminal C-C double bond in trans-configuration,β-and γ-type linkages appear as knots or defects which are,in fact,the C-C couplings in cis-configurations.Interestingly,the“defects”can be effectively suppressed by adjusting the surface coverage,thus making it of general interest for uniform structure modulation.

关 键 词：on-surface chemistry scanning tunneling microscope all-trans polyacetylene LINKAGE chain growth 

分 类 号：TQ317[化学工程—高聚物工业]