A borondipyrrolemethene-based turn-on fluorescent probe for silver ion with high sensitivity and selectivity and its application in water samples and living cells |
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Authors: | Zhi Li Juan Ou-Yang Ya-Jun Fu Chun-Yan Li Yong-Fei Li Song-Jiao Li |
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Institution: | 1. Key Laboratory of Environmentally Friendly Chemistry and Applications of Ministry of Education, College of Chemistry, Xiangtan University, Xiangtan 411105, PR China;2. College of Chemical Engineering, Xiangtan University, Xiangtan 411105, PR China |
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Abstract: | A borondipyrrolemethene-based compound (1) is synthesized and used as a “turn-on” fluorescent probe for silver ions (Ag+). The probe displays highly sensitive fluorescence response toward Ag+ with a 40-fold fluorescence enhancement when 60 μM of Ag+ is added. The fluorescence intensity of the probe is linearly dependent on Ag+ concentration ranging from 0.05 to 60 μM. And the detection limit (LOD) can reach 0.02 μM, which complies with the standard of World Health Organization (WHO) for drinking water (0.9 μM). Moreover, the probe shows remarkable selectivity for Ag+ over other metal ions. Furthermore, the response behavior of 1 toward Ag+ is pH independent in the neutral range from 6.0 to 8.0. The response of 1 toward Ag+ is fast (response time is less than 2 min) and reversible chemically. What’s more, the sensing mechanism of probe 1 toward Ag+ is verified by mass spectra (MS) and density functional theory (DFT) calculations. In particular, the probe is applied for detection of Ag+ in water samples and living cells successfully. |
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Keywords: | Fluorescent probe Borondipyrrolemethene Silver ion Water sample Cell image |
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