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Pillararene-Cucurbituril: A Hybrid of Pillararenes and Cucurbiturils
Wen-Hao Li1, Min He1, Ai-Jiao Wang1
1Department of Chemistry, College of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, P. R. China.
Abstract:
A pillararene-cucurbituril (PAQ) was constructed by bridging the units of cucurbiturils and pillararenes via double-methylene linkages, featuring UV absorption and fluorescence emission abilities and facile postmodification capability, while cucurbiturils show no chromophores and a poor ability to be derivatized. PAQ exhibited sensitive and selective detection of Fe3+, and its host-guest binding ability was verified by encapsulation of methyl viologen. By utilizing the postmodification sites of 1,4-dimethoxybenzene moieties, hydroxypillararene-cucurbituril and allylpillararene-cucurbituril have been synthesized to confirm the postmodification capability.
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