Amphiphilic acrylamide-based copolymer with porphyrin pendants for the highly selective detection of Hg2+ in aqueous solutions

作者：Wang, Yajie; Wu, Feipeng^*

来源：Polymer, 2015, 56: 223-228.

DOI：10.1016/j.polymer.2014.11.037

• Amphiphilic polymer
• Porphyrin
• Mercury recognition

A novel amphiphilic acrylamide-based polymer with porphyrin pendants that was prepared from radical copolymerization of 5-(p-acryloyloxyphenyl)-10,15,20-triphenylporphyrin (AOTPP) and N,N-dimethylacrylamide (DMAM) has been first reported as a highly selective and sensitive optochemical sensor for Hg2+. The responsive optical properties of the polymer were investigated by UV-vis-absorption spectroscopy in aqueous solutions. Upon adding Hg2+, a new peak at 456 nm in the Soret band of porphyrin molecule was induced and gave rise to a visible color change from brown red to green, which was attributed to the formation of unique aggregates intrigued by the coordinative interaction between Hg2+ and porphyrin groups. Moreover, there is nearly no interference observed from other metal ions (Na+, Mg2+, K+, Zn2+, Ca2+, Cr3+, Co2+, Ni2+, Pb2+, Cu2+, Al3+ and Fe3+), thus indicating the excellent sensing selectivity towards Hg2+ by the sensor. On the basis of the relationship of absorbance changes and Hg2+ concentrations, the polymeric sensor is allowed for quantitative analysis of Hg2+ ion with a low detection limit of 50 nM.

• 出版日期2015-1-15
• 单位中国科学院大学; 中国科学院理化技术研究所