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A new near-infrared colorimetric and ratiometric fluorescent chemodosimeter for Hg2+ detection was devised, with a donor-acceptor-donor (D-A-D) molecular configuration and containing a dithioacetal group served as a sensing unit, and with a large stokes shift over 160nm. The oxidation reaction of Hg2+ broke the electron-donating interaction of dithioacetal moiety, and the obstruction in the intramolecular...
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