Molecular design to increase the photosensitivity of photochromic phenoxyl–imidazolyl radical complexes. (18th September 2019)

• Record Type: Journal Article
• Authors: Li, Ruiji; Arai, Hiroki; Kobayashi, Yoichi; Mutoh, Katsuya; Abe, Jiro
• Is Part Of: Materials chemistry frontiers. Volume 3:Number 11(2019)
• Page Start: 2380
• Page End: 2387
• Publication Date: 2019-09-18
• Subjects: Materials science -- Periodicals; Chemistry -- Periodicals; 540
• DOI: 10.1039/c9qm00468h
• Languages: English
• ISSNs: 2052-1529

Abstract

Abstract : An efficient strategy to increase the photosensitivity of a fast photochromic molecule is demonstrated by introducing aryl groups as sensitizers. Abstract : Photochromic molecules have received a lot of interest in potential applications. The development of the phenoxyl–imidazolyl radical complex (PIC), which generates two nonequivalent radicals upon light irradiation along with the fast photochemical reaction, is crucial for photoresponsive materials. However, as a novel photochromic compound, the low photosensitivity of PIC derivatives has limited their practical applications. Herein, increased photosensitivity and absorption coefficients of PIC derivatives were achieved while keeping the thermal back reaction rate by introducing the substitution of aryl groups. This strategy gives significant insight into the development of desirable fast photochromic compounds based on the PIC framework.