Journal of Photochemistry and Photobiology A: Chemistry p. 28 - 35 (2015)
Update date:2022-08-04
Topics:
Fedorova
Sergeeva
Panchenko
Fedorov, Yu. V.
Erko
Berthet
Delbaere
Two novel isomeric photochromic naphthopyrans (1 and 2) containing naphthalimide moieties were prepared and studied. In the compound 1, O-atom of pyran cycle is at C-3 position of naphthalene ring, whereas, in compound 2, O-atom of pyran cycle is at C-4 position. In the compound 2 due to para-position O-atom of pyran photochrome cycle is involved into the conjugated naphthalimide system. The variety in mutual position of pyran and naphthalimide units leads to remarkable difference in photochromic characteristics. Both compounds demonstrate the switching of the fluorescence by photoinduced conversion between the closed and open forms.
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