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- W2151542893 abstract "To explain the large photoinduced molecular reorientation phenomena observed in dye-doped liquids and liquid crystals, the hypothesis was formed that the rotational mobility of dye molecules is strongly altered during their electronic excitation. Here, we report the direct measurement of a 30%-50% mobility decrease of photoexcited anthraquinone dye molecules dissolved in a cyanophenyl liquid host. This mobility reduction is ascribed to an excited-state reinforcement of intermolecular hydrogen bonding. These results provide fully independent evidence for the validity of current models of the photoinduced reorientation and a working demonstration of the design concepts of fluctuating-friction molecular motors. We propose that a light-induced modulation of molecular mobility associated with electronic photoexcitation is of general relevance to the behavior of photosensitive organic materials, currently investigated for applications in optical data storage, liquid-crystal displays, and organic optoelectronic devices." @default.
- W2151542893 created "2016-06-24" @default.
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- W2151542893 date "2003-07-11" @default.
- W2151542893 modified "2023-10-16" @default.
- W2151542893 title "Molecular reorientation by photoinduced modulation of rotational mobility" @default.
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- W2151542893 doi "https://doi.org/10.1103/physreve.68.011701" @default.
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