文献类型：期刊文献

英文题名：Ferrocene-Grafted Photochromic Triads Based on a Sterically Hindered Ethene Bridge: Redox-Switchable Fluorescence and Gated Photochromism

作者：Cai, Yunsong[1,2];Gao, Ya[3];Luo, Qianfu[1,2];Li, Mengqi[1,2];Zhang, Junji[1,2];Tian, He[1,2];Zhu, Wei-Hong[1,2]

机构：[1]East China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Fine Chem, Shanghai Key Lab Funct Mat Chem, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[3]Shanghai Univ Engn Sci, Coll Fundamental Studies, Shanghai 201620, Peoples R China

年份：2016

卷号：4

期号：9

起止页码：1410

外文期刊名：ADVANCED OPTICAL MATERIALS

收录：;EI(收录号：20162302477502);WOS:【SCI-EXPANDED(收录号:WOS:000386351200014)】；

基金：This work was supported by National 973 Program (No. 2013CB733700), NSFC for Creative Research Groups (21421004), and Distinguished Young Scholars (21325625), NSFC/China, the Oriental Scholarship, Science and Technology Commission of Shanghai Municipality (15XD1501400), and the Fundamental Research Funds for the Central Universities (WJ1416005).

语种：英文

外文关键词：Chromophores - Organometallics - Redox reactions - Fluorescence - Iron compounds - Ethylene

摘要：Multifunctional switches, as well as gated photochromism, are particularly challenging. Here, a ferrocene (Fc)-modified photochromic diarylethene (DAE) with sterically hindered ethene bridge, in which the photo-inactive parallel conformer and photoactive antiparallel conformer are individually investigated, is reported. The photoswitchable triad system (parallel conformer p-Fc and anti-parallel ap-Fc) contains three functional parts: photochromic DAE unit, naphthalimide chromophore, and redox-active ferrocene. Upon incorporation of ferrocene unit, the photochromic efficiency in the anti-parallel triad conformer ap-Fc is blocked to a great extent in the ferrocene state but distinctly enhanced in the ferrocenium state via chemical or electrochemical stimuli, thereby constructing redox-gated photochromism. Meanwhile, the reversible redox between ferrocene and ferrocenium states can also switch "OFF/ON" the fluorescence of naphthalimide chromophore via photoinduced electron transfer pathway (PET). The fluorescence and photoisomerization in the triad system are well modulated with chemical-or electrochemical redox and light stimuli, which enables the specific gated photochromism and fluorescence switches work in multi-addressable states.