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A large guest for a small host: The tweezering process about the bipyridinium core of a dendrimer by a molecular tweezer (see picture) has been studied electrochemically and by fluorescence spectroscopy and is found to be quite similar to the threading/dethreading processes observed with wire-type bipyridinium-based units and ring-shaped molecules.
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Balzani et al. (2005) studied this question.
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