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Photo-controlled phase separation and mixing of a mixture of water and 2-butoxyethanol caused by photochromic isomerisation of spiropyran

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Abstract

Photo induced phase separation of a mixture of water and 2-butoxyethanol, in which spiropyran was dissolved as a photoresponsive molecule, was investigated. It was found that the phase separation temperature of the merocyanine (MC) form solution was higher than that of the spiropyrane (SP) form; therefore phase separation was induced by visible light irradiation to the solution which caused the photoisomerization from the MC form to the SP form. The system also exhibits reversible photoinduced phase mixing by irradiation of UV light. The photo-chemical phase separation was also induced by the nanosecond laser pulse irradiation and the dynamics of the phase domain growth were studied.

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Authors and Affiliations

  1. Department of Chemistry, Graduate School of Science, Tohoku University, Sendai, 980-8578, Japan

    Shinji Kajimoto, Ayaka Mori & Hiroshi Fukumura

Authors
  1. Shinji Kajimoto
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  2. Ayaka Mori
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  3. Hiroshi Fukumura
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This paper is part of a themed issue on synthetic and natural photoswitches.

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Kajimoto, S., Mori, A. & Fukumura, H. Photo-controlled phase separation and mixing of a mixture of water and 2-butoxyethanol caused by photochromic isomerisation of spiropyran. Photochem Photobiol Sci 9, 208–212 (2010). https://doi.org/10.1039/b9pp00137a

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  • DOI: https://doi.org/10.1039/b9pp00137a

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