文献类型：期刊文献

英文题名：Structural Transformation of Two-Dimensional Metal-Organic Coordination Networks Driven by Intrinsic In-Plane Compression

作者：Liu, Jun[1,2];Lin, Tao[3];Shi, Ziliang[3];Xia, Fei[1,2];Dong, Lei[3];Liu, Pei Nian[1,2];Lin, Nian[3]

机构：[1]E China Univ Sci & Technol, Shanghai Key Lab Funct Mat Chem, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Inst Fine Chem, Shanghai 200237, Peoples R China;[3]Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China

年份：2011

卷号：133

期号：46

起止页码：18760

外文期刊名：JOURNAL OF THE AMERICAN CHEMICAL SOCIETY

收录：;EI(收录号：20115014597741);WOS:【SCI-EXPANDED(收录号:WOS:000297398900047)】；

基金：This work was supported financially by Hong Kong Research Council Grant No. 602409, the National Natural Science Foundation of China (Project Nos. 20902020, 21172069), the Fundamental Research Funds for the Central Universities and the Innovation Program of Shanghai Municipal Education Commission (12ZZ050).

语种：英文

外文关键词：Binding energy - Organometallics - Scanning tunneling microscopy - Self assembly

摘要：The coordination assembly of 1,3,5-trispyridylbenzene with Cu on a Au(111) surface has been investigated by scanning tunneling microscopy under ultrahigh vacuum conditions. An open two-dimensional (2D) metal-organic network of honeycomb structure is formed as the 2D network covers partial surface. Upon the 2D network coverage of the entire surface, further increment of molecular density on the surface results in a multistep nonreversible structural transformation in the self-assembly. The new phases consist of metal-organic networks of pentagonal, rhombic, zigzag, and eventually triangular structures. In addition to the structural change, the coordination configuration also undergoes a change from the two-fold Cu-pyridyl binding in the honeycomb, pentagonal, rhombic and zigzag structures to the three-fold Cu-pyridyl coordination in the triangular structure. As the increment of molecular packing density on the surface builds up intrinsic in-plane compression pressure in the 2D space, the transformation of the structure, as well as the coordination binding mode, is attributed to the in-plane compression pressure. The quantitative structural analysis of the various phases upon molecular density increment allows us to construct a phase diagram of network structures as a function of the in-plane compression.