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A novel imidazophenazine-based metallogel act as reversible H2PO4− sensor and rewritable fluorescent display material

Publication date:

November 2017


Source:Sensors and Actuators B: Chemical, Volume 251

Author(s): Qi Lin, Feng Zheng, Tao-Tao Lu, Juan Liu, Hui Li, Tai-Bao Wei, Hong Yao, You-Ming Zhang

By rationally introduced 1H-imidazo[4,5-b]phenazine moiety into the gelator molecular, a novel organogelator G5 was designed and synthesized. Imidazophenazine moiety could act as fluorescent group as well as binding site. The gelator G5 could form a stable organogel (OG5) accompanied with dramatic aggregation-induced emission enhancement (AIEE) in DMF. The AIEE of OG5 could be quenched by adding Fe3+ into the OG5. Meanwhile, OG5 could form no fluorescence stable metallogel (FeG) with Fe3+. Interestingly, the metallogel (FeG) could reversibly fluorescent “turn-on” sense H2PO4 with high selectivity and sensitivity. The detection limit of FeG for H2PO4 is 1.0×10−6 molL−1, moreover, other ions did not interfere in the sensing process. The H2PO4 sensing mechanism was confirmed based on competitive coordination between gelator, Fe3+ and H2PO4 . The metallogel FeG could act as reversible H2PO4 sensor and convenient H2PO4 test kits. In addition, the FeG film also could act as an rewritable fluorescent display material.
Graphical abstract




Authors:   Author(s): Qi Lin, Feng Zheng, Tao-Tao Lu, Juan Liu, Hui Li, Tai-Bao Wei, Hong Yao, You-Ming Zhang
Journal:   Sensors and Actuators B: Chemical
Year:   2017
Publication date:   21-May-2017
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