Solvent-dependent selective fluorescence assay of aluminum and gallium ions using julolidine-based probe
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- 作者：Jin Young Noh ; Soojin Kim ; In Hong Hwang ; Ga Ye Lee ; Juhye Kang ; So Hyun Kim ; Jisook Min ; Sungsu Park ; Cheal Kim ; Jinheung Kim
- 关键词：Aluminum ions ; Fluorescence chemosensor ; Gallium ions ; Julolidine ; Turn-on sensor ; Solvent dependence
- 刊名：Dyes and Pigments
- 出版年：December, 2013
- 年：2013
- 卷：99
- 期：3
- 页码：1016-1021
- 全文大小：848 K
文摘
The selective assay of aluminum and gallium ions is reported using fluorescence enhancement of a julolidine-based probe (PJI) in aqueous and nonaqueous solvents. The binding properties of PJI with metal ions were investigated by UV-vis, fluorescence, and electrospray ionization mass spectrometry. PJI gave no fluorescence in water, dimethylformamide, and methanol. The addition of aluminum ions switches on the fluorescence of the sensor PJI in both buffer and dimethylformamide, while other metal ions show no significant fluorescence changes. However, in methanol, its fluorescence can be selectively turned from a turn-on fluorescent sensor for gallium ions. The complex stability constants (Ka) for the respective stoichiometric 1:1 complexation of PJI with aluminium and gallium ions were obtained by fluorimetric titrations.