A simple fluorophore/surfactant ensemble as single discriminative sensor platform: Identifying multiple metal ions in aqueous solution

作者：Liu, Lili; Fan, Junmei; Ding, Liping^*; Zhu, Bing; Huang, Xinyan; Gong, Weiwei; Xin, Yunhong; Fang, Yu

来源：Journal of Photochemistry and Photobiology A: Chemistry , 2016, 328: 1-9.

DOI：10.1016/j.jphotochem.2016.05.013

• Fluorescent sensor
• Cross-reactive response
• Surfactant
• Amphiphilic aggregate
• Pyrene

A simple imidazolium-modified mono-pyrene derivative (Py-IM) is synthesized. SDS assemblies modulate its fluorescence emission from monomer emission in neat aqueous solution to monomer-excimer co-emission in pre-micelles and to monomer emission again in micellar solutions. The ensemble based on Py-IM and SDS assemblies exhibiting both monomer and excimer emission displays multiple wavelength cross-reactive responses to cationic metal ions. This single sensor system could well discriminate 6 quenching metal ions (Fe3+, Cu2+, Pb2+, Ni2+, Co2+, and Mn2+) through principal component analysis method. Control experiments with Py-IM in the absence of SDS assemblies and in SDS micellar solutions reveal that the modulation effect of surfactant assemblies plays an important role in the cross reactive responses of the cationic probe, which provides a general way of fabricating discriminative single sensor systems.

• 单位
  陕西师范大学