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Exclusive formation of a meridional complex of a tripodand and perfect suppression of guest recognition†

Hiroki Morita,a   Shigehisa Akine, ORCID logo b   Takashi Nakamura ORCID logo a  and  Tatsuya Nabeshima ORCID logo *a  
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* Corresponding authors

a Faculty of Pure and Applied Sciences and Tsukuba Research Center for Energy Materials Science (TREMS), University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8571, Japan
E-mail: nabesima@chem.tsukuba.ac.jp

b Graduate School of Natural Science and Technology and WPI Nano Life Science Institute (WPI-NanoLSI), Kanazawa University, Kakuma-machi, Kanazawa 920-1192, Japan

Abstract

Tripodal ligands have been utilized for complexation-induced structural change, but all the tripodal complexes reported so far are facial isomers, which do not completely reduce the recognition ability by closing the binding pocket. We now report the first example of the selective synthesis of a meridional tripodal complex. The tripodal ligand with a 1,3,5-triethyl-2,4,6-tris(methylene)benzene pivot possessing 2,2′-bipyridine on each arm exclusively formed a mononuclear complex with the mer-[Fe(bpy)]2+ unit. The meridional tripodal complex has a unique structure in which one bipyridine unit is self-penetrated. As a result of cavity blockage, the ion recognition property of the tripodand has been successfully suppressed.

Graphical abstract: Exclusive formation of a meridional complex of a tripodand and perfect suppression of guest recognition

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Article information

https://doi.org/10.1039/D1CC00146A
Submitted
09 Jan 2021
Accepted
27 Jan 2021
First published
27 Jan 2021
Chem. Commun., 2021, Advance Article
Article type
Communication
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Exclusive formation of a meridional complex of a tripodand and perfect suppression of guest recognition

H. Morita, S. Akine, T. Nakamura and T. Nabeshima, Chem. Commun., 2021, Advance Article , DOI: 10.1039/D1CC00146A

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