Cylindrical and Conical Conjugated Nanobelts by Longitudinal Extension of Cycloparaphenylene and Their Double-Walled
Xuan-Wen Chen1, Qing-Song Deng1, Bing-Hui Zheng1
1State Key Laboratory of Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, P. R. China.
Abstract:
Constructing carbon nanotubes and related segments with atomic precision remains challenging, despite significant advances, including cycloparaphenylene (CPP), carbon nanobelts, and phenine nanotubes. Here, we report three conjugated nanobelts (NB1-NB3) constructed by longitudinal π-extension of CPP with rings of the same, smaller, or larger size. Each nanobelt comprises three fused aromatic units bridging two axial CPP rings, which mediate the intermolecular assembly. NB1-NB3 have a delocalized electronic structure, showing largely red-shifted emission. The smaller NB2 can insert into NB3 to form a stable double-walled assembly (NB2⊃NB3), which exhibits energy transfer with nearly 100% efficiency.
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