Author： Wang Qinghua
Publisher： Springer Publishing Company
ISSN： 1040-0400
Source： Structural Chemistry, Vol.24, Iss.1, 2013-02, pp. : 295-301
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Abstract
The photochromic behaviors of four Schiff bases derived from (R)-3-phenyl-2-phthalimidopropionic acid were studied to reveal the substituent effect on the photosensitivity. Upon ultraviolet light radiation, all of compounds 1-4 exhibit photochromic behavior in solution through intramolecular hydrogen atom transfer. In solid state, only compound 2 is photochromic, which may be due to the presence of meta-site methoxyl. In solution, the photochromic behavior of compound 3 is remarkable than the other compounds, which may be ascribed to the presence of para-site hydroxyl. Only compound 4 exhibits solvatochromism, which may be ascribed to the large dissociation tendency of the naphthol hydroxyl. The influences of acidity on the UV-Vis absorption spectra of the title compounds were also studied.
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