Synthesis, characterization, and UV–visible study of some new photochromic formyl-containing 1′,3′,3′-trimethylspiro[chromene-2,2′-indoline] derivatives

Autor: Zeinalabedin Sepehr, Hossein Nasr-Isfahani, Ali Reza Mahdavian, Amir Hossein Amin
Rok vydání: 2021
Předmět:
Zdroj: Journal of the Iranian Chemical Society. 18:3061-3067
ISSN: 1735-2428
1735-207X
Popis: The spiropyran derivatives can exist in two forms, the closed-ring spiropyran form and the open-ring merocyanine (MC) form. The SP form could be converted into the MC form upon UV irradiation. In this work, some 1′,3′,3′-trimethylspiro[chromene-2,2′-indoline] derivatives containing the nitro and formyl groups are synthesized via the reaction of 1,3,3-trimethyl-2-methylene-5-nitroindoline with the corresponding salicylaldehyde derivatives. These compounds have different photochromic behaviors. The synthesized photochromic molecules are characterized by the FT-IR, 1H-NMR, and 13C-NMR spectroscopic techniques. In order to investigate the photochromic properties of these compounds, the UV–visible spectroscopic analyses of their methanolic solutions before and after exposure to a UV lamp (in the spectral range of 360–400 nm) are studied.
Databáze: OpenAIRE
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