Hamer Sebastian, von Glasenapp Jan-Simon, Röhricht Fynn, Li Chao, Berndt Richard, Herges Rainer
Otto-Diels-Institut für Organische Chemie, Kiel University, Otto-Hahn-Platz 4, 24098, Kiel, Germany.
Institut für Experimentelle und Angewandte Physik, Kiel University, Leibnizstrasse 19, 24098, Kiel, Germany.
Chemistry. 2021 Dec 9;27(69):17452-17458. doi: 10.1002/chem.202103237. Epub 2021 Nov 5.
A set of dipolar molecular rotor compounds was designed, synthesized and adsorbed as self-assembled 2D arrays on Ag(111) surfaces. The title molecules are constructed from three building blocks: (a) 4,8,12-trioxatriangulene (TOTA) platforms that are known to physisorb on metal surfaces such as Au(111) and Ag(111), (b) phenyl groups attached to the central carbon atom that function as pivot joints to reduce the barrier to rotation, (c) pyridine and pyridazine units as small dipolar units on top. Theoretical calculations and scanning tunneling microscopy (STM) investigations hint at the fact that the dipoles of neighboring rotors interact through space through pairs of energetically favorable head-to-tail arrangements.
设计、合成了一组偶极分子转子化合物，并将其作为自组装二维阵列吸附在Ag(111)表面上。标题分子由三个结构单元构建而成：(a) 已知能物理吸附在诸如Au(111)和Ag(111)等金属表面的4,8,12-三氧杂三角烯（TOTA）平台；(b) 连接到中心碳原子上的苯基，作为枢轴关节以降低旋转势垒；(c) 顶部的吡啶和哒嗪单元作为小偶极单元。理论计算和扫描隧道显微镜（STM）研究表明，相邻转子的偶极通过空间以能量有利的头对头排列对相互作用。
