A multiresponsive fluorescent switch based on diarylethene and terpyridine units was developed. It exhibits effective switchable fluorescence which can be controlled by UV/visible light or metal ion/EDTA in solution. More importantly, having low toxicity, it can enter live cells as a fluorescent probe and can also serve as a detector for the biological process of metal ion transmembrane transport.
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Piao et al. (2009) studied this question.
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