Angewandte
Chemie
bis(9,10-phenylethinyl)anthracene. Similar fluorophores con-
the spatial resolution of far-field fluorescence microscopy by
at least an order of magnitude.
nected to two acceptor units displayed around 80% fluorescence
modulation and 83% Ffl.[6g] In another study,[7b] in which Lucifer
yellow was connected to different acceptors through relatively
long and flexible cadaverine linkers acylated with succinic or
butanoic acid residues, the fluorescence decreased by 65 or 84%
in the PS state (at 313 and 320 nm, respectively).
Received: June 29, 2006
Published online: October 16, 2006
Keywords: fluorescence modulation · heterocycles ·
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.
molecular switches · photochromism · rhodamines
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[9] Outstanding fluorescence modulation was reported for con-
densed dithieno(thiophenes)[6a,b] or ethinyl-Bodipy[6i] residues as
fluorophores directly attached to 1,2-bis(2-alkyl-3-thienyl)per-
fluorocyclopentenes. The highest conversion to the closed form
was 92%[6a,b] and 96%[6i] and was achieved at 365 and 254 nm,
respectively. In both cases, the remaining fluorescence was 10–
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an acceptor, 87% conversion to the nonfluorescent CF was
observed at the PS state at 355 nm.[7a] Irie and co-workers[7c] used
the 1,3-adamantane linker and studied in detail the single
molecule properties of the highly fluorescent 2,5-dimethoxy-
Angew. Chem. Int. Ed. 2006, 45, 7462 –7465
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