Abstract
A chemosensor consisting of two terpyridines covalently linked to a dithienosilole unit (1) has been synthesized, and its optical and metal sensing properties have been investigated. Due to the metal–organic coordination function, 1 can bind with many transition metal ions and display different fluorescence responses that cause it to function as a “turn-off” fluorescent chemosensor. A significant bathochromic shift in the fluorescence spectra is observed in the presence of Zn2+. Meanwhile, the emission of 1 is weakened upon exposure to Ag+ and Fe2+ and completely quenched by Ni2+, Co2+, and Cu2+. Based on the observed results, several logic gates, such as XNOR, INHIBIT, and IMPLICATION, have been achieved by controlling the chemical inputs.
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