Acylthiourea derivatives as colorimetric sensors for anions: Synthesis, characterization and spectral behaviors

作者：Liu, Shuangshuang; Kang, Jing; Cao, Xiufang^*; Yue, Xiali

来源：Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy , 2016, 153: 471-477.

DOI：10.1016/j.saa.2015.09.003

• Acylthiourea
• Colorimetric sensor
• Anion recognition
• Naked-eye detection

Several acylthioureas have been synthesized to develop colorimetric sensors for detection of biologically important anions. UV-vis titration experiments indicated that the absorbance values have a good linear relationship with concentration of anions when the anions were added in AR-1, AR-4 and AR-6 sensor molecules. The detection limit to AcO- and F- is 5 x 10(-6) mol/L when the concentration of receptors are 2 x 10(-5) mol/L. Especially, compounds AR-1 and AR-4, decorated with strong electron-withdrawing NO2 substituent, showed augmented anion sensing properties, being capable of naked-eye detecting of F- and AcO- when the water content is lower than 15%. The recognition details of anion sensing were also assessed using H-1 NMR technique and confirmed that the basic anions induced deprotonation of N-H.

• 出版日期2016-1-15
• 单位华中农业大学