Tris(spiroborate)-type anionic nanocycles.

Hiroshi Danjo, Natsuyo Mitani, Yusuke Muraki, Masatoshi Kawahata, Isao Azumaya, Kentaro Yamaguchi, Toshifumi Miyazawa

Index: Chem. Asian J. 7(7) , 1529-32, (2012)

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Abstract

Full circle: New cyclic tris(spiroborate)s were prepared as molecular recognition modules for nanometer-sized cationic guests. These cyclophanes were simply prepared by treating corresponding bis(2,3-dihydroxynaphthalene)s with an equimolar amount of boric acid. The molecular recognition ability of these cyclic spiroborates was estimated in solution and crystal phases by the use of [Ir(tpy(2))](3+) as a typical example of a cationic guest.Copyright © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.