A naphthalimide-rhodamine ratiometric fluorescent probe for Hg based on fluorescence resonance energy transfer |
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Authors: | Yunlong LiuXin Lv Yun ZhaoMaliang Chen Jing LiuPi Wang Wei Guo |
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Affiliation: | School of Chemistry and Chemical Engineering, Shanxi University, Taiyuan 030006, China |
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Abstract: | On the basis of fluorescent resonance energy transfer from 1,8-naphthalimide to rhodamine B, a new fluorophore dyads (4) containing rhodamine B and a naphthalimide moiety was synthesized as a ratiometric fluorescent probe for detecting Hg2+ with a broad pH range 5.7-11.0. The selective fluorescence response of 4 to Hg2+ is due to the Hg2+-promoted desulfurization of the thiocarbonyl moiety, leading to the ring-opening of rhodamine B moiety of 4. When 4 was employed at 0.1 μM with the slit size being 20 nm/20 nm, a low level of Hg2+ (up to 3 × 10−8 M) can be detected using the system. |
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Keywords: | Fluorescent probe Ratiometric Naphthalimide Rhodamine Desulfurization Mercury ion |
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