Abstract
A series of colorimetric and fluorescent pH chemosensors L1 ∼ L3 , bearing acylhydrazone moiety as pH sensing site and nitrophenylfuran moiety as signal group, were designed and synthesized. Among these sensors, L1 showed excellent reversible pH response for a specific pH change in very narrow pH range (at pH ranged from 12.0 to 12.5, within 0.5 pH unit) through sharp optical spectra and obvious fluorescent color changes. Common anions (such as F − , Cl − , Br − , I − , AcO − , H 2 PO 4 − , HSO 4 − , ClO 4 − , CN − , OH − ) and cations (such as Fe 3+ , Hg 2+ , Ag + , Ca 2+ , Cu 2+ , Zn 2+ , Pb 2+ , Cd 2+ , Ni 2+ , Co 2+ , Cr 3+ , Mg 2+ ) did not interfere with the pH response process. These properties make L1 act as an accurate pH controlled “on–off–on” fluorescence switch and implication (IMP) function logic gate. • Accurate pH controlled “on–off–on” fluorescence switch. • Simple and efficient pH input and fluorescence output logic gate. • With high reversibility and selectivity. • Fluorescent and colorimetric dual channel response.
Published Version
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