Surface-Assisted Two-Dimensional Diyne Polycyclotrimerization: Direct Visualization and the Mechanism
作者单位：Institute of PhysicsCAS
会议名称：《中国化学会第29届学术年会》
会议日期：2014年
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)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学]
关 键 词：Cyclotrimerization diyne surface-assisted reaction first principle calculation STM
摘 要：Cyclotrimerization of alkynes to aromatics represents a promising approach to fabricate two-dimensional conjugated networks due to its single-reactant and atom-economy attributes,in comparison with other multicomponent coupling ***,related reaction mechanism of alkyne cyclotrimerization has not been well understood due to technical *** this work,we take a surface chemical reaction approach to study fundamental polymerization mechanism by using a diyne monomer named 4,4’-diethynyl-1,1’-biphenyl as a test *** have succeeded in directly characterizing reactant,intermediates and its reaction products by using scanning tunneling microscopy,which allows us to gain mechanistic insights into the reaction *** result reveals experimentally for the first time that the polycyclotrimerization is a two-step[2+2+2]cyclization *** work provides an in-depth understanding of polycyclotrimerization process at the atomic level,offering a new avenue to design and construct of single-atom-thick conjugated networks.