Abstract
The two-component self-assemblies of a monodendron (BIC3) and three molecules with pyridyl terminals including 4,4′-bipyridine (BP), and two pyridylethynyl molecules (PE3, and PE4) were investigated by scanning tunneling microscope (STM) on graphite surface. It has been found that BIC3 can self-assemble into flexible and linear molecular templates to accommodate the pyridyl derivatives. By choosing guest molecules with different structures, BIC3 host templates and the ultimate host-guest structures can be selectively regulated. The distance of terminal pyridyl groups in the guest molecules determine the hydrogen bond pattern in the host-guest assemblies. Moreover, the size and the number of pyridyl groups of the guest molecules affect the unit cell parameter and molar ratio of different components in the resulted structures. The result is helpful for the fabrication of the linear host-guest nanostructures, and provides important insight to design two dimensional structures with desired functions.
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