Two-Dimensional Organization of Mono- and Bisurea Supramolecular Polymers Studied by Scanning Tunneling Microscopy

被引：6
|
作者：
Kikkawa, Yoshihiro [1 ]
Kubota, Shun [2 ]
Karatsu, Takashi [2 ]
Kitamura, Akihide [2 ]
Kanesato, Masatoshi [1 ]
Yagai, Shiki [2 ,3 ]
机构：
[1] Natl Inst Adv Ind Sci & Technol, Photon Res Inst, Tsukuba, Ibaraki 3058562, Japan
[2] Chiba Univ, Dept Appl Chem & Biotechnol, Grad Sch Engn, Inage Ku, Chiba 2638522, Japan
[3] Japan Sci & Technol Agcy, PRESTO, Kawaguchi, Saitama 3320012, Japan
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2010年 / 10卷 / 02期
关键词：
Hydrogen-Bonding; Urea; p-Phenylenevinylene; Supramolecular Polymer; Scanning Tunneling Microscopy; LIQUID/SOLID INTERFACE; THIOPHENE DERIVATIVES; MOLECULAR RECOGNITION; ACHIRAL MOLECULES; UREA; ORGANOGELS; NANOWIRES; GRAPHITE; DIMERS; CHAINS;
D O I：
10.1166/jnn.2010.1881
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Scanning tunneling microscopy (STM) of mono- and bisurea-functionalized oligo(p-phenylenevinylene)s at solid/liquid interface visualized two-dimensionally-ordered double columnar structures of pi-conjugated segments scaffolded by one-dimensional supramolecular polymerization of urea hydrogen-bonding units. In contrast to a persistent alignment of the bisurea compound supported by twofold intermolecular urea-urea hydrogen-bonding, the building blocks in the monourea double columns shows dynamic fluctuation and defects because of their rotational motion around urea-urea hydrogen-bonding axis and/or adsorption-desorption of the individual molecules from the surface. Self-assembled structures of mono- and bisurea compounds at solid/liquid interface revealed by STM can be related to their gelation abilities in organic solvents.
引用
收藏
页码：803 / 808
页数：6
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