Abstract
Hydrazine (N2H4) is extensively used in industry but highly toxic; hence, highly sensitive detection of N2H4 is extremely meaningful. Herein, a colorimetric and near-infrared (NIR) ratiometric fluorescent probe named DXM-OH was rationally designed and synthesized based on oxanthrene malononitrile derivative for the specific detection of N2H4. The dicyanovinyl group in DXM-OH was served as the recognition unit for N2H4. DXM-OH showed high sensitivity to N2H4 in the range of 1-900μM, with the limit of detection (LOD) of 0.09μM (2.87ppb), which is much lower than the U.S. Environmental Protection Agency standard (10ppb). Furthermore, the practical applications of DXM-OH in detecting N2H4 in real water samples and imaging of N2H4 in living cells were demonstrated, indicating its potential utility for N2H4 sensing in environmental and biological samples.
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