title: Ferrocenylethynyl-terminated azobenzenes: synthesis, electrochemical, and photoisomerization studies.
abstract: Ferrocenylethynyl-terminated derivatives 8-12 have been synthesized and characterized by electrochemistry and UV/Vis spectroscopy. The electrochemical and photophysical studies indicate that the electronic communication in ferrocenylethynyl-substituted derivatives is strongly influenced by the substituted position of the ferrocenylethynyl moiety. In situ electrochemical oxidation or chemical oxidation caused a characteristically weak ligand-to-metal charge-transfer (LMCT) band to appear at 700-1000 nm. Subsequent electrochemical reduction or chemical reduction recovered the most of the original curve and the color of the solution as well. Among the derivatives, compound 8 exhibits the highest cis/trans molar ratio (64:36) in the photostationary state (PSS) upon light irradiation at 365 nm. Compound 8 exhibits excellent fatigue resistance and reversibility under several repeated reversible isomerization cycles.
authors: Department of Chemistry, Fuzhou University, Fuzhou 350116 (P.R. China).
authors: Jian-Feng
authors: JF
authors: Yan
authors: Da-Qiang
authors: DQ
authors: Lin
authors: Xin-Gang
authors: XG
authors: Wang
authors: Kai-Qiang
authors: KQ
authors: Wu
authors: Li-Li
authors: LL
authors: Xie
authors: Yao-Feng
authors: YF
authors: Yuan
keywords: UV/Vis spectroscopy; azo compounds; electrochemistry; isomerization; redox chemistry