Eu3+-functionalized metal-organic framework composite as ratiometric fluorescent sensor for highly selective detecting urinary 1-hydroxypyrene. (April 2018)

• Record Type: Journal Article
• Authors: He, Ran; Wang, Yu-Ling; Ma, Hui-Fang; Yin, Shun-Gao; Liu, Qing-Yan
• Is Part Of: Dyes and pigments. Volume 151(2018)
• Page Start: 342
• Page End: 347
• Publication Date: 2018-04
• Subjects: Ratiometric fluorescent probe -- Eu3+-functionalized MOF -- Detecting urinary 1-hydroxypyrene -- Sensing of 1-hydroxypyrene with high sensitivity; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2018.01.018
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: An anionic three-dimensional metal-organic framework ofJXNU-4 with one-dimensional channels occupied by the extraframework dimethylammonium cations was chosen as a parent compound to host Eu 3+ cations by uncoordinated carboxylate oxygen atoms in its pores through a cation exchange experiment. The Eu 3+ -incorporated sample Eu 3+ @JXNU-4 is structurally characterized and displays excellent Eu 3+ luminescence and good fluorescence stability in aqueous solution, which is resulted from the sensitization and protection provided by the parented framework. The Eu 3+ @JXNU-4 was developed as a fluorescent probe for urine 1-hydroxypyrene (1-HP), which is a biomarker of polycyclic aromatic hydrocarbons (PAHs) carcinogens and represents the internal dose of PAHs exposure in the human body. In the presence of 1-HP, the 1-HP emission emerges and Eu 3+ @JXNU-4 exhibits 1-HP- and Eu 3+ -based dual emission. The intensity of the 1-HP emission increases with the concentration of 1-HP increasing, while the Eu 3+ emission recedes in the meantime. The ratio value of 1-HP emission at 502 nm ( I 502 ) and Eu 3+ emission at 616 nm ( I 616 ) versus the concentration of 1-HP reveals a good linear relationship, which indicates the Eu 3+ @JXNU-4 is an excellent candidate for ratiometric fluorescence sensing for 1-HP. Finally, the fluorescence mechanism was discussed. Graphical abstract: A novel Eu 3+ -functionalized Eu 3+ @MOF composite as a ratiometric fluorescence sensor with high sensitivity for specific detection of urinary 1-hydroxypyrene, which is the metabolite of inhaled polycyclic aromatic hydrocarbons in human body, was prepared. Highlights: The Eu 3+ -incorporated MOF composite as fluorescent sensor is was proposed. The Eu 3+ -incorporated MOF composite was developed as a ratiometric fluorescent probe for urine 1-hydroxypyrene. The fluorescence sensing property of Eu 3+ -incorporated MOF composite were verified. The mechanism of the sensing of 1-hydroxypyrene was disclosed.