期刊
TALANTA
卷 194, 期 -, 页码 119-126出版社
ELSEVIER
DOI: 10.1016/j.talanta.2018.10.015
关键词
Logic gate; Memory element; Chemical inputs; Implication
资金
- Research Council of Payame Noor University
Cation to anion relay recognition was studied for the first time with sequential specificity (Cu2+ -> F- or Co2+ -> F-) using a fluorescence ON - OFF - ON mechanism. L-1 is a receptor with high selectivity for F-, Cu2+ and Co2+ ions in the solution of DMSO/H2O with a 9:1 vol ratio. Absorption and fluorescence spectra were used to investigate the sensing process. Fluorescent emission intensity of L-1 at 324 is quenched (switch-Off) after the addition of Cu2+ and Co2+. Surprisingly, complex L-1 + Cu2+ or L-1 + Co2+ is restored with addition of F- into the compound (switch-On). Consequently, implication (from emission) and inhibit (from absorption) logic gates are constructed at molecular level. The gates operate in fluorescence and absorption modes when Cu2+ and For Co2+ and F- are used as input materials and the fluorescence intensity signal as outputs. Based on reversible and reproducible system, a sequential memory unit with integrated Writing-Reading-Erasing-Reading behavior, is developed.
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