A fluorescent probe for both pH and Zn2+ based on 2-(1-phenyl-1H-benzo[d]imidazol-2-yl)phenol |
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| Authors: | Ju Chuan-Chuan Yin Hong-Ju Yuan Chui-Li Wang Ke-Zhi |
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| Institution: | College of Chemistry, Beijing Normal University, Beijing 100875, China. |
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| Abstract: | A sensitive fluorescent probe 2-(1-phenyl-1H-benzod]imidazol-2-yl)phenol (HBIZ) for pH and Zn2+ has been developed. Great changes have taken place in the UV-vis absorption and fluorescence spectra for HBIZ upon increasing pH of its aqueous solution, acting as a pH-induced emission "off-on-off" switch with large enhancement factors of ～290 and ～75 over the pH range of 1.00-5.40 and 5.20-10.40. A over 100-fold fluorescence enhancement was also observed after complexation of HBIZ to Zn2+ in N,N-dimethylformamide. |
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