Chiral recognition and selection during the self-assembly process of protein-mimic macroanions

Panchao Yin, Zhi-Ming Zhang, Hongjin Lv, Tao Li, Fadi Haso, Lang Hu, Baofang Zhang, John Bacsa, Yongge Wei, Yanqing Gao, Yu Hou, Yang-Guang Li, Craig L. Hill, En-Bo Wang () and Tianbo Liu ()
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Panchao Yin: The University of Akron
Zhi-Ming Zhang: Key Laboratory of Polyoxometalate Science of Ministry of Education, Northeast Normal University
Hongjin Lv: Emory University
Tao Li: Advanced Photon Source, Argonne National Laboratory
Fadi Haso: The University of Akron
Lang Hu: The University of Akron
Baofang Zhang: The University of Akron
John Bacsa: Emory University
Yongge Wei: Tsinghua University
Yanqing Gao: Key Laboratory of Polyoxometalate Science of Ministry of Education, Northeast Normal University
Yu Hou: Emory University
Yang-Guang Li: Key Laboratory of Polyoxometalate Science of Ministry of Education, Northeast Normal University
Craig L. Hill: Emory University
En-Bo Wang: Key Laboratory of Polyoxometalate Science of Ministry of Education, Northeast Normal University
Tianbo Liu: The University of Akron

Nature Communications, 2015, vol. 6, issue 1, 1-8

Abstract: Abstract The research on chiral recognition and chiral selection is not only fundamental in resolving the puzzle of homochirality, but also instructive in chiral separation and stereoselective catalysis. Here we report the chiral recognition and chiral selection during the self-assembly process of two enantiomeric wheel-shaped macroanions, [Fe28(μ3-O)8(Tart)16(HCOO)24]20− (Tart=D- or L-tartaric acid tetra-anion). The enantiomers are observed to remain self-sorted and self-assemble into their individual assemblies in their racemic mixture solution. The addition of chiral co-anions can selectively suppress the self-assembly process of the enantiomeric macroanions, which is further used to separate the two enantiomers from their mixtures on the basis of the size difference between the monomers and the assemblies. We believe that delicate long-range electrostatic interactions could be responsible for such high-level chiral recognition and selection.

Date: 2015
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DOI: 10.1038/ncomms7475

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