Photochromic and electrochromic properties of 1′,3′,3′-trimethyl-6-piperidino- and -morpholinospiro[indoline-2′,3-3H-naphtho[2,1-b][1,4]-oxazines]
1994
Electrochromic properties of 1′,3′,3′-trimethyl-6-piperidino- and-morpholinospiro[indoline-2′,3-3H-naphtho[2,1-b][1,4]-oxazines] resulting from their ionization and the formation of intermediate products were studied. The characteristic features of the photochromic behavior of these compounds are positive solvatochromism for absorption spectra of a colored form and an increase in the rate constant for thermobleaching with increasing solvent polarity.
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