Photochromic and fluorescence properties of coumarin fulgimides
Khamis Nassor Ally, Leyla Gundogdu, Mahmut Kose
article (Uluslararası, Hakemli) | Yazar(lar): Khamis Nassor Ally, Leyla Gundogdu, Mahmut Kose | Yıl: 2020 | Dergi/Kurum: TURKISH JOURNAL OF CHEMISTRY | İndeks: WOS.SCI | DOI: 10.3906/kim-2003-31 | Anahtar Kelimeler: Photochromism, fulgide, fulgimide, coumarin, fluorescence switch — Özet: Four new fulgimides possessing
Four new fulgimides possessing a fluorescent coumarin unit were synthesized from the corresponding fulgides, and their photochromic as well as fluorescence properties were investigated. The open-ring forms of coumarin fulgimides were found to exhibit fluorescence in the visible region. Upon exposure to UV light, the fulgimides were transformed into the nonfluorescent closed-ring forms, which can be reverted to the initial fluorescent open-ring forms on exposure to visible light. The efficiency of quenching of fluorescence was as high as 95% at the photostationary state of UV irradiation.