Fluorescence-On Response via CB7 Binding to Viologen–Dye Pseudorotaxanes
Organic Letters2012Vol. 14(16), pp. 4046–4049
Citations Over TimeTop 19% of 2012 papers
Abstract
Fluorescence-on sensors typically rely on disrupting photoinduced electron transfer quenching of the excited state through binding the electron donor. To provide a more general fluorescence-on signaling unit, a quencher-fluorophore dyad has been developed in which quenching by electron transfer to a tethered viologen acceptor can be disrupted through complexation of the viologen by cucurbit[7]uril (CB7). Dyads of benzyl viologen-rhodamine B or a BODIPY fluorophore gave upon CB7 complexation 14- and 30-fold fluorescence enhancement, respectively.
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