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Two highly selective and sensitive ferrocenyl-based thioethers 4a and 4b as no nitrogen atom contained chemosensors were designed and synthesized by using an easy method. The thioethers 4a and 4b have shown excellent selective recognition toward Hg2+ through optical and electrochemical signals. The detection limit values can reach 6.93×10−7M for 4a-Hg2+ and 4.79×10−7M for 4b-Hg2+. Moreover, ferrocenyl-based...
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