Pankajakshan Asha, Kuznetsov Denis, Mandal Sukhendu
School of Chemistry , Indian Institute of Science Education and Research Thiruvananthapuram , Thiruvananthapuram , Kerala 695551 , India.
Department of Functional Nanosystems and High Temperature Materials , National University of Science and Technology, MISIS , Leninsky, pr. 4 , Moscow 119049 , Russia.
Inorg Chem. 2019 Jan 22;58(2):1377-1381. doi: 10.1021/acs.inorgchem.8b02898. Epub 2019 Jan 10.
Here we describe, a simple solution and solid-state sensor for the ultrasensitive detection of Hg(II) ions in both standardized and environmental samples through changes of fluorescence intensity of a zinc-based metal-organic framework (MOF). The MOF is highly water stable in a wide pH range from 4 to 11. The lower detection limit of Hg is 10 M with a very high binding constant of 1.011 × 10 M s. It also exhibits a high selectivity toward mercury ion in the presence of other interfering metal ions. The MOF is found to retain its efficiency in detecting mercury ion in spiked environmental water samples.
