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Lanthanide supramolecular helical diastereoselective breaking induced by point chirality: mixture or P-helix, M-helix
Chi-Tung Yeung1, Wesley Ting Kwok Chan, Siu-Cheong Yan
1State Key Laboratory of Chirosciences and Department of Applied Biology and Chemical Technology, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong. wing-tak.wong@polyu.edu.hk ga-lai.law@polyu.edu.hk.
Abstract:
The self-assembly of lanthanide (europium or lanthanium) bimetallic triple helicates from two closely related chiral ligands resulted in a very different supramolecular phenomenon. One gave rise to significantly diastereoselective formation of a triple helicate, whereas the other led to diastereoselective breaking to generate a mixture of P and M diastereomers in ∼1 : 1.1 ratio. The first X-ray crystal structure of a chiral ligand based lanthanide triple-helicate indicates that successive CH-π interactions were found to maintain the supramolecular helical structure.
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