title: Acylthiourea derivatives as colorimetric sensors for anions: Synthesis, characterization and spectral behaviors.
abstract: 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 5×10(-6) mol/L when the concentration of receptors are 2×10(-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 (1)H NMR technique and confirmed that the basic anions induced deprotonation of N-H.
authors.affiliation: College of Science, Huazhong Agricultural University, Wuhan 430070, PR China.
authors.forename: Shuangshuang
authors.initials: S
authors.lastname: Liu
authors.affiliation: College of Science, Huazhong Agricultural University, Wuhan 430070, PR China.
authors.forename: Jing
authors.initials: J
authors.lastname: Kang
authors.affiliation: College of Science, Huazhong Agricultural University, Wuhan 430070, PR China. Electronic address: caoxiufang@mail.hzau.edu.cn.
authors.forename: Xiufang
authors.initials: X
authors.lastname: Cao
authors.affiliation: College of Science, Huazhong Agricultural University, Wuhan 430070, PR China. Electronic address: yxl@mail.hzau.edu.cn.
authors.forename: Xiali
authors.initials: X
authors.lastname: Yue
mesh_terms: D000838:Anions / Q000032:analysis*; D003116:Color; D003124:Colorimetry / Q000295:instrumentation* / Q000379:methods*; D057230:Limit of Detection; D066244:Proton Magnetic Resonance Spectroscopy; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D013890:Thiourea / Q000138:chemical synthesis* / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D000838:Anions; D014867:Water; D013890:Thiourea
keywords: Acylthiourea; Anion recognition; Colorimetric sensor; Naked-eye detection