A multi-mode-driven molecular shuttle: photochemically and thermally reactive azobenzene rotaxanes

H Murakami, A Kawabuchi, R Matsumoto…

Index: Murakami, Hiroto; Kawabuchi, Atsushi; Matsumoto, Rika; Ido, Takeshi; Nakashima, Naotoshi Journal of the American Chemical Society, 2005 , vol. 127, # 45 p. 15891 - 15899

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Citation Number: 150

Abstract

The shuttling process of α-CyD in three rotaxanes (1-3) containing α-cyclodextrin (α-CyD) as a ring, azobenzene as a photoactive group, viologen as an energy barrier for slipping of the ring, and 2, 4-dinitrobenzene as a stopper was investigated. The trans-cis photoisomerization of 1 by UV light irradiation occurred in both DMSO and water due to the movement of α-CyD toward the ethylene group, while the photoisomerization of 2 ...