Coumarin Modified Rhodamine Derivative: Fluorescent Chemosensor Selectively Recognizing Al^3+ and Ca^2+ |
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作者姓名: | CAO Li JIA Chunman ZHANG Qi CHEN Da ZHANG Chunyan QIAN Yaao |
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作者单位: | Hainan Provincial Key Lab of Fine Chem., Key Study Center for Tropical Resources Utilization, Ministry of Education, Hainan University, Haikou 570228, P. R. China |
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基金项目: | Supported by the National Natural Science Foundation of China(No.21261008), the Key Scientific and Technological Plan Project of Hainan Province, China(No.ZDXM20110024), the Hainan Province Special Integration Fund of Industry and Research, China(No.CXY20130010) and the International Science and Technology Cooperation Projects of Hainan Province, China(No. KJHZ2014-05). |
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摘 要: | A fluorescent probe with a coumarin moiety bound to rhodamine 6G hydrazide(l) was synthesized. Its sensing behavior toward various metal ions was investigated with fluorescence methods. Compound I displays different fluorescence emission responses to Al^3+ and Ca^2+ at the same excitation wavelength in the visible light region, while no changes occur after the addition of other metal ions. The binding ratios of the complexs of 1-Al^3+ and 1-Ca^2+ are both 2:1 according to the Job plot and high resolution mass spectrometer(HRMS) experiments. Moreover, emission spectrum of 1-Ca^2+ complex and absorption spectrum of the rbodamine dyes overlap largely. When Al^3+ was added to the 1-Ca2+ system, calcium in complex 1-Ca2+ can be displaced by Al^3+, resulting in the output of another ratiometric sensing signal, which demonstrates that the 1-Ca^2+ complex can be served as a new and effective fluorescence resonance energy transfer(FRET) donor for rhodamine derivatives.
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关 键 词: | 罗丹明6G 衍生物 香豆素 荧光传感器 Al Ca 荧光共振能量转移 钙络合物 |
收稿时间: | 2014-01-06 |
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