Journal
DYES AND PIGMENTS
Volume 92, Issue 3, Pages 909-915Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.dyepig.2011.07.020
Keywords
Fluorescent probe; Ratiometric; Naphthalimide; Rhodamine; Desulfurization; Mercury ion
Funding
- Natural Science Foundation of China (NSFC) [20772073, 21072121]
- Natural Science Foundation of Shanxi Province [2008011015-2]
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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 mu M with the slit size being 20 nm/20 nm, a low level of Hg2+ (up to 3 x 10(-8) M) can be detected using the system. (C) 2011 Elsevier Ltd. All rights reserved.
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