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A novel turn-on fluorescent sensor for Al 3+ based on photochromic diarylethene with a 2-hydroxybenzhydrazide unit has been successfully designed and synthesized. The photochromic and fluorescent characteristics were studied methodically in methanol under irradiation using UV/vis light and induced by Al 3+ /EDTA. This fluorescent sensor was highly selective toward Al 3+ with an obvious fluorescent color change from dark blue to blue. The Job's plot and mass spectrometry (MS) analysis indicate a binding stoichiometry of 1 : 1 between the fluorescent sensor and Al 3+ . Moreover, a test strip containing this fluorescent sensor was prepared to allow for the easy detection of Al 3+ in water. Finally, a logic circuit was designed using four input signals (In1: UV; In2: vis; In3: Al 3+ ; In4: EDTA) and one output signal.

A turn-on fluorescence sensor for the highly selective detection of Al3+ based on diarylethene and its application on test strips

A turn-on fluorescence sensor for the highly selective detection of Al³⁺ based on diarylethene and its application on test strips