Light-driven open-close motion of chiral molecular scissors |
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Authors: | Muraoka Takahiro Kinbara Kazushi Kobayashi Yuka Aida Takuzo |
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Institution: | Department of Chemistry and Biotechnology, School of Engineering, The University of Tokyo,7-3-1, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan. |
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Abstract: | The first example of "light-driven chiral molecular scissors" (1), which consists of 1,1',3,3'-tetraarylferrocene as a pivot part and azobenzene as a driving part, was synthesized. Absorption, circular dichroism (CD), and 1H NMR spectral studies on the photoinduced isomerization process of an enantiomer of 1 agreed well with a prediction by a DFT calculation, where a motion of the handles via light-driven contraction/expansion of the connecting azobenzene strap was transformed, through a pivotal motion of the ferrocene unit, into an open-close motion of the blade parts. |
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