Abstract
A simple organic molecule of 2-naphthol-1-aldehyde-conjugated thiourea (denoted as receptor 1) is designed and prepared. Absorption and fluorescence spectra response profiles of receptor 1 with different ionic inputs vary significantly in a DMSO-H(2)O solution (V/V = 9 : 1) through modulating intramolecular charge transfer (ICT) processes. In particular, the changes of the dual-modal spectra when anions, such as F(-), AcO(-) or H(2)PO(4)(-), are introduced in such an aqueous solution indicate that receptor 1 could be tolerant to H(2)O at least to some extent in recognizing anions. On the basis of the above results, binary logic operations (OR, NOR and INHIBIT) and their multiply-logic functions with different combinations have been achieved at the molecular level by changing different chemical inputs. The output signals can be encoded as absorption and fluorescence dual-mode, depending on the choice of 2-naphthol as the chromophore and fluorophore core.
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