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Abstract
Detection of silver ions (Ag+) in living cells has becoming more and more attractive due to the important biological impact of Ag+ on cellular functions. Here, we put forward a new approach to realize the in situ fluorescence imaging and detection of Ag+ in single cells via an ultrasensitive Ag+-responsive probe, 3′,6′-bis (diethylamino)-2-(2-iodoethyl) spiro[isoindoline-1,9′-xanthen]-3-one (BDISIX). In the presence of Ag+, the fluorescence of the probe can be turned ‘on’, generating strong red fluorescence. Using breast cancer cells (MCF-7) as the example, we successfully realize the imaging of intracellular Ag+ through one-step incubation of the probe, which is especially convenient and fast for the in situ intact detection of Ag+ in living cells.
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