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Insulation of a coumarin derivative with [1]rotaxane to control solvation-induced effects in excited-state dynamics
Go M Russell1, Hiroshi Masai1,2, Jun Terao1
1Department of Basic Science, Graduate School of Arts and Sciences, The University of Tokyo, 3-8-1, Komaba, Meguro-ku, Tokyo, 153-8902, Japan. cterao@g.ecc.u-tokyo.ac.jp.
Abstract:
A coumarin derivative bearing a [1]rotaxane structure with permethylated α-cyclodextrins suppressed unwanted solvation-induced effects and increased luminescent quantum yields in medium- and high-polarity solvents. The non-radiative decay was suppressed by the twist in the π-conjugated system and the radiative decay was enhanced by the suppression of the polarity-induced structural changes.
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