Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 18, Issue 42, Pages 13388-13394Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201202189
Keywords
bisthienylethene; fluorescence; molecular switches; photochromism; redox chemistry
Categories
Funding
- NSFC/China
- National 973 Program [2011CB808400]
- Fundamental Research Funds for the Central Universities [WK1013002]
- [SRFDP 200802510011]
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A new photochromic bisthienylethene system (BTE?NAFc) is reported in which the ferrocene unit (Fc) is incorporated into a naphthalimide chromophore as the central ethene bridging unit. The incorporated Fc unit in the photochromic system of BTE?NAFc has several effects on optical properties, such as fluorescence-modulation through photoinduced electron transfer (PET), a decrease in the photochromic cyclization quantum yield, and a selective two-step oxidation process. The ability to drive ring-opening and ring-closing reactions with a secondary redox-modulation provides increased functionality to the photochromic system. Based on these meaningful photo- and redox-modulation properties, five unprecedented multi-addressable states (BTE?NAFc, BTE?NAFc+, c-BTE?NAFc, c-BTE?NAFc+, and BTE+?NAFc+) and gated photochromism are successfully obtained within the unimolecular BTE platform, thus providing deeper insight into photochromic systems as multifunctional outputs.
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