A naphthalimide-rhodamine ratiometric fluorescent probe for Hg2+ based on fluorescence resonance energy transfer
A naphthalimide-rhodamine ratiometric fluorescent probe for Hg2+ based on fluorescence resonance energy transfer
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DOI：
10.1016/j.dyepig.2011.07.020
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发表时间：
2012-03-01
影响因子：
4.5
通讯作者：
Guo, Wei
中科院分区：
文献类型：
--
作者：
Liu, Yunlong;Lv, Xin;Guo, Wei
基于1，8-萘二甲酰亚胺与罗丹明B的荧光共振能量转移，合成了一种新的含罗丹明B和萘二甲酰亚胺基团的荧光二联体（4），作为比率荧光探针，在5.7-11.0的较宽pH范围内检测Hg ~（2+）。4对Hg 2+的选择性荧光响应是由于Hg 2+促进硫代羰基部分的脱硫，导致4的罗丹明B部分开环。当4浓度为0.1 μ M，狭缝尺寸为20 nm/20 nm时，该系统可检测到低水平的Hg ~（2+）（最高可达3 × 10 ~（-8）M）。(C)2011爱思唯尔有限公司版权所有。
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.