A novel histidine-functionalized 1,8-naphthalimide-based fluorescent chemosensor for the selective and sensitive detection of Hg2+ in water

作者：Zhang, You-Ming^*; Zhong, Kai-Peng; Su, Jun-Xia; Chen, Xiao-Peng; Yao, Hong; Wei, Tai-Bao; Lin, Qi^*

来源：New Journal of Chemistry, 2017, 41(9): 3303-3307.

DOI：10.1039/c6nj03930h

• MERCURY
• SENSOR

Hg2+ is one of the the most threatening heavy metal ions; thus, finding a quick and easy way to detect it is very important. In this study, we designed and synthesized a simple Hg2+ chemosensor Z, which bears carboxyl and imidazolyl moieties as the hydrophilic group site and Hg2+ binding site, whereas the naphthalimide moiety acts as the signal group. Interestingly, the sensor Z could dissolve in water and show high selectivity and sensitivity for Hg2+ in aqueous solution. Other coexistent competitive metal ions (Fe3+, Ag+, Ca2+, Cu2+, Co2+, Ni2+, Cd2+, Pb2+, Zn2+, Cr3+, and Mg2+) had no interference in the process of detecting Hg2+. The detection limit of sensor Z towards Hg2+ was 1.785 x 10(-7) M, which indicated its high detection sensitivity. Moreover, the immediate response of Z to Hg2+ provides a real-time detection method for Hg2+ in aqueous solution. In addition, sensor Z can undergo cyclic utilization.

• 出版日期2017-5-7
• 单位西北师范大学