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- W2810553583 abstract "Naphthoxazine-spiro-indolines (NOSIs) can exist in a colourless and a coloured form.These compounds can interconvert between these two forms either photochemically orthermally and are resilient to degradation even after repeated cycles of colouration andbleaching. Absorption spectra of both the stable colourless form and the energetically lessstable coloured form have been measured.Several NOSI compounds have been shown to photoconvert to the coloured form with anefficiency of between 0.06–0.74, depending upon the compound conditions under whichthe conversion is brought about. The factors which have been varied in this work are: thebasicity of the 6'-substituent; the size of the N-alkyl group within these compounds; andthe nature solvent or matrix in which the reaction occurs. Electron donation from the6'-group has been shown to increase the quantum yield of the forward reaction whereassolvent polarity increases have been shown to reduce the quantum yield. [Continues.]" @default.
- W2810553583 created "2018-07-10" @default.
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- W2810553583 date "1995-01-01" @default.
- W2810553583 modified "2023-09-28" @default.
- W2810553583 title "Photochromism of naphthoxazine-spiro-indolines" @default.
- W2810553583 hasPublicationYear "1995" @default.
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