An easily accessible switch-on optical chemosensor for the detection of noxious metal ions Ni(II), Zn(II), Fe(III) and UO2(II)

作者：Gupta Vinod Kumar; Singh Ashok Kumar; Kumawat Lokesh Kumar; Mergu Naveen

来源：Sensors and Actuators B: Chemical , 2016, 222: 468-482.

DOI：10.1016/j.snb.2015.08.063

• Optical chemosensor
• Receptor-metal complexes
• Colorimetric sensor
• pH
• Selectivity

Two new highly selective colorimetric and fluoregenic aminopyridine Schiff bases (L1 and L2) were synthesized by simple refluxing method and characterised via standard NMR and HRMS techniques. Its excellent metal sensing abilities explored on absorbance and fluorescence spectroscopy. The recognition colorimertric sensing behavior of probes L1 and L2 towards Ni(II), Zn(II), Fe(III) and UO2(II) ions were carefully investigated with different aspects of sensing behavior such as sensitivity, binding constant, stoichiometry, pH range and interference effect. Moreover, L1 and L2 also displayed excellent "off-on" fluoregenic selectivity with Zn(II). The results revealed that the sensors provided colorimetric and fluoregenic sensing excellent response with low limit of detection, under neutral conditions.

• 出版日期2016-1
• 单位中国石油大学（北京）