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Published on: March 4, 2021
Synthesis and Host-Guest Chemistry of Pyrene-Embedded Helical Carbon Nanohoops
Shiyu Tan1,2, Gang Wu1,2, Chong Yao1,2
1State Key Laboratory of Soil Pollution Control and Safety, Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou310058, P. R. China.
Abstract:
Herein, we report the synthesis of pyrene-embedded carbon nanohoops (3PyCPP) via a triangular gold complex-templated assembly strategy, in which three pyrene units are strategically linked at their 1,6-positions. This synthetic approach yields four crystal structures, and only the enantiomeric conformers [(15,6)AAA3PyCPP and (15,6)BBB3PyCPP] are exclusively observed in the crystalline state. 3PyCPP demonstrates a moderate fluorescence quantum yield (ΦF = 46.2%) and a large Stokes shift. Moreover, host-guest chemistry studies reveal that 3PyCPP binds C70 in an inclusion manner to form a unique 1:1 complex. This work shows a type of carbon-rich nanohoop with tailored structures and dual utility in optoelectronics and supramolecular host-guest systems.
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