1. School of Pharmaceutical and Chemical Engineering, Chengxian College, Southeast University, Nanjing 210088, P. R. China;2. College of Food Science and Light Industry, Nanjing Technical University, Nanjing 211816, P. R. China
Abstract:
Two novel rhodamine-based polystyrene solid-phase fluorescence sensors PS-PA-I and PS-PA-II with different lengths of polyamines were synthesized for Hg(II) determination. The detection mechanism involving the Hg(II) chelation-induced spirocycle open of rhodamine was proposed with the aid of theoretical calculation. The stronger N-Hg bond and the longer polyamine chain in PS-PA-II led to a better selectivity, much higher and more quickly fluorescence response to Hg(II).