Abstract
A novel photochromic diarylethene with a salicylidene Schiff base group was synthesized and its multi-controllable fluorescence switching properties induced by light, base, and metal ions were investigated. The diarylethene displayed sequence-dependent responses through efficient interaction of the salicylidene Schiff base group with base and metal ions, and it could serve as a naked-eye chemosensor for highly selective detection of different metal ions in different solvents. When triggered by Zn2+ in acetonitrile, its fluorescence was enhanced by 400 fold with a concomitant color change from dark to bright yellow. In contrast, when it bound to Al3+ in methanol, its fluorescence was enhanced by 110-fold accompanied with a color change from dark to bright cyan. On the basis of its light-, base-, and metal-responsive fluorescence behaviors, two complicated logic gates were constructed using the fluorescence intensity as output and combinational stimuli of light and chemical species as inputs.
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