Ae. Kozlovskaya et al., PHOTOCHROMIC AND ELECTROCHROMIC PROPERTIES OF 1',3',3'-TRIMETHYL-6-PIPERIDINO-OXAZINE AND PIRO[INDOLINE-2',3-3H-NAPHTHO[2,1-B][1,4]-OXAZINE], Russian chemical bulletin, 43(5), 1994, pp. 780-782
Electrochromic properties of 1',3',3'-trimethyl-6-piperidino- and iro[
indoline-2',3-3H-naphtho[2,1-b][1,4]-oxazines] resulting from their io
nization and the formation of intermediate products were studied. The
characteristic features of the photochromic behavior of these compound
s are positive solvatochromism for absorption spectra of a colored for
m and an increase in the rate constant for thermobleaching with increa
sing solvent polarity.