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- W2028546722 endingPage "1030" @default.
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- W2028546722 abstract "Photo-induced isomerization of a newly synthesized surfactant, 1′(6-trimethylammoniododecyl)-3′,3′-dimethyl-6-nitrospiro-(2H-1-benzopyran-2,2′-indoline) bromide (SP-Me-12), has been characterized on the basis of the UV–vis absorption spectra and the surface tension data. Visible light (λ>420nm) incident on the aqueous solution of SP-Me-12 results in the isomerization from the merocyanine (MC) form to the spiropyran (SP) form; this structural change was confirmed by a complete disappearance of a characteristic absorption peak of the MC form. When the surfactant solution is stored in the dark, the isomerized SP form reverts to the original MC form, however, the reverse isomerization rate is observed to be considerably slower than that seen for visible light irradiation (from the MC form to the SP form). A reversible change in the surface tension of the aqueous surfactant solution is observed for the photo-induced isomerization: the surface tension measured below the critical aggregation concentration decreases as a result of the visible light irradiation and it is gradually reversed to the original level during the equilibration in the dark." @default.
- W2028546722 created "2016-06-24" @default.
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- W2028546722 date "2007-12-01" @default.
- W2028546722 modified "2023-09-26" @default.
- W2028546722 title "Photo-isomerization of spiropyran-modified cationic surfactants" @default.
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- W2028546722 doi "https://doi.org/10.1016/j.jcis.2007.08.042" @default.
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