罗丹明类比色探针的合成及在Cu2+检测中的应用

• 作 者: 高超颖 杨杨 王冬琪 陈静 刘景林
• 机 构: 内蒙古民族大学化学化工学院,
• 出 处: 分析试验室
• 发表日期: 2016年05期
• 关键词: Rhodamnine Colorimetric sensor Absorbance spectra Cu2+ S2-

以4-硝基水杨醛和罗丹明B酰肼通过缩合反应合成了探针分子Rb NS。在50%(V/V)的乙腈-水溶液中,加入Cu~(2+)后探针溶液由无色变为粉红色,554 nm处的吸收强度显著增强。罗丹明探针在Cu~(2+)诱导下螺内酰胺结构开环,并形成1:1的络合物。在Rb NS-Cu~(2+)络合物溶液中加入S~(2-),溶液粉红色褪去,表明Rb NS对Cu~(2+)的识别过程是可逆的。在实际水体样品中,探针Rb NS对Cu~(2+)的检出限为1.16×10~(-6)mol/L。

The probe molecule Rb NS was synthesized by condensation reaction with 4-nitrosalicylaldehyde and rhodamine B hydrazide. In 50% (V / V) of acetonitrile-water solution, the probe solution after adding Cu 2+ changed from colorless to pink, and the absorption intensity at 554 nm was significantly enhanced. The rhodamine probe opens the ring of spiro lactam under Cu 2+ induction and forms a 1: 1 complex. S 2- (2-) was added into the solution of Rb NS-Cu 2+ complex, and the pink color of the solution faded out, indicating that the recognition of Cu 2+ by Rb NS was reversible. In real water sample, the detection limit of Rb NS to Cu 2+ was 1.16 × 10 -6 mol / L.