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Dynamic covalent bond based on reversible photo [4 + 4] cycloaddition of anthracene for construction of
Jiang-Fei Xu1, Yu-Zhe Chen, Li-Zhu Wu
1Key Laboratory of Photochemical Conversion and Optoelectronic Materials, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences , Beijing 100190, P. R. China, and University of the Chinese Academy of Sciences , Beijing 100049, P. R. China.
Abstract:
Dynamic covalent bonds supplied by reversible anthracene dimerization were combined with pillar[5]arene/imidazole host-guest interactions to construct double-dynamic polymers. Heating such polymers (in solution or as a gel) led to depolymerization by dissociation of either the host-guest complexes alone or the complexes and the anthracene dimers, depending on the extent of heating. The polymers reformed readily upon cooling or irradiation.
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