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3 nm-Scale Molecular Switching between Fluorescent Coordination Capsule and Nonfluorescent Cage

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journal contribution
posted on 02.05.2007 by Koji Harano, Shuichi Hiraoka, Mitsuhiko Shionoya
A 3 nm-sized cage-shaped Hg6L4 complex with large openings was quantitatively formed from trismonodentate ligand (L) and Hg2+ ions in a self-assembled manner. The cage complex shows reversible interconversion with a capsule-shaped Hg6L8 complex in response to the ratio of ligand to Hg2+. This structural switching is coupled with reversible ON/OFF switching of fluorescence between fluorescent Hg6L8 capsule and nonfluorescent Hg6L4 cage.

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