Photoisomerization and optical behavior study of a subphthalocyanine–bisazobenzene–subphthalocyanine triad with visible-light response. Issue 33 (4th August 2016)

• Record Type: Journal Article
• Authors: Shi, Maohu; Mack, John; Yin, Luan; Wang, Xiaoyong; Shen, Zhen
• Is Part Of: Journal of materials chemistry. Volume 4:Issue 33(2016)
• Page Start: 7783
• Page End: 7789
• Publication Date: 2016-08-04
• Subjects: Materials -- Periodicals; Chemistry, Analytic -- Periodicals; Optical materials -- Research -- Periodicals; Electronics -- Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c6tc02750d
• Languages: English
• ISSNs: 2050-7526

Abstract

Abstract : A novel subPc–BAB–subPc triad exhibits significant fluorescence on–off switching upon E, E ↔ E, Z photoisomerization of the bisazobenzene moiety. Abstract : The synthesis and characterization of a subphthalocyanine–bisazobenzene–subphthalocyanine triad are reported. Evidence for E, E ↔ E, Z isomerization of the linking bisazobenzene moiety is observed in the optical and NMR spectra when the subphthalocyanine rings are used as light-harvesting units. Electronic coupling and communication between the two para -azo units decrease the photoisomerization efficiency. An obvious decrease in fluorescence intensity is observed on moving from E → Z with a recovery in intensity observed on moving back from Z → E that can be attributed to a change in the rate of non-radiative decay.