A naphthalimide-rhodamine ratiometric fluorescent probe for Hg(2+) based on fluorescence resonance energy transfer

作者：Liu Yunlong; Lv Xin; Zhao Yun; Chen Maliang; Liu Jing; Wang Pi; Guo Wei^*

来源：Dyes and Pigments, 2012, 92(3): 909-915.

DOI：10.1016/j.dyepig.2011.07.020

• Fluorescent probe
• Ratiometric
• Naphthalimide
• Rhodamine
• Desulfurization
• Mercury ion

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 Hg(2+) with a broad pH range 5.7-11.0. The selective fluorescence response of 4 to Hg(2+) is due to the Hg(2+)-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 Hg(2+) (up to 3 x 10(-8) M) can be detected using the system.

• 出版日期2012-3
• 单位山西大学