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Rational design, synthesis of reaction-based dual-channel cyanide sensor in aqueous solution
Jun-Jian Li1, Wei Wei1, Xiao-Liang Qi1
1School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China.
Abstract:
A new dual-channel sensor for the detection of cyanide was developed based on the conjugated of naphthalene and malononitrile. Upon the addition of CN(-), the sensor displayed very large blue-shift in both fluorescence (80nm) and absorption (120nm) spectra. The sensor of cyanide was performed via the nucleophilic attack of cyanide anion to vinylic groups of the sensor with a 1:1 binding stoichiometry and the color changed of the sensor is mainly due to the intramolecular charge transfer process improvement. The intramolecular charge transfer progress was blocked with color changed and fluorescence blue-shift. The mechanism of sensor reaction with CN(-) ion was studied using (1)H NMR and mass spectrometry.
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