Journal
JOURNAL OF THE CHINESE CHEMICAL SOCIETY
Volume 67, Issue 10, Pages 1734-1741Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jccs.202000176
Keywords
azobenzene; daisy chain; dendrimer; paraquat; rotaxane
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Type III-B rotaxane dendrimer is a member of the rotaxane dendrimer family, but it is defined as dendritic polyrotaxane, branched through rings. Such rotaxane dendrimers have been synthesized through versatile copper-catalyzed azide-alkyne cycloaddition reactions. In order to incorporate more functionalities into type III-B rotaxane dendrimers, three different potential functionalities-azobenzene toward light switch, daisy chain toward higher degree of contraction, and extension and cyclobis (paraquat-p-phenylene) (CBPQT) toward redox chemistry-were combined into the original design of type III-B rotaxane dendrimers. Two azo-based G1/G2 and four new G1 and G2 hetero type III-B rotaxane dendrimers were synthesized and characterized by H-1 NMR spectroscopy and electrospray ionization mass spectrometry.
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