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Shen, Zhaocun; Wang, Tianyu; Liu, Minghua
Angewandte Chemie (International ed.), December 1, 2014, Letnik: 53, Številka: 49Journal Article
A C3‐symmetric benzene‐1,3,5‐tricarboxamide substituted with ethyl cinnamate was found to self‐assemble into supramolecular gels with macroscopic chirality in a DMF/H2O mixture. The achiral compound simultaneously formed left‐ and right‐handed twists in an unequal number, thus resulting in the macroscopic chirality of the gels without any chiral additives. Furthermore, ester–amide exchange reactions with chiral amines enabled the control of both the handedness of the twists and the macroscopic chirality of the gels, depending on the structures of the chiral amines. These results provide new prospects for understanding and regulating symmetry breaking in assemblies of supramolecular gels formed from achiral molecular building blocks. The self‐assembly of achiral and C3‐symmetric benzene‐1,3,5‐tricarboxamides (BTAC) in DMF/H2O mixtures without any chiral dopants led to supramolecular gels that showed macroscopic chirality. The unequal number of left‐ and right‐handed twists and thus the macroscopic chirality of the gels could be controlled through amide–ester exchange reactions.
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