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A Selective and Sensitive Phenanthroimidazole‐Based “Reactive” Ratiometric Sensor for Recognition of Hg 2+ Ions in Aqueous Solution
Author(s) -
Yan Yuanyuan,
Zhang Rui,
Yu Xiang,
Xu Hui
Publication year - 2014
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201402266
Subject(s) - chemistry , detection limit , metal ions in aqueous solution , imidazole , aqueous solution , ion , stoichiometry , fluorescence , mass spectrometry , selectivity , analytical chemistry (journal) , inorganic chemistry , photochemistry , stereochemistry , organic chemistry , catalysis , chromatography , quantum mechanics , physics
Based on specific reactivity of the vinyloxy group to Hg 2+ ions, a new ratiometric phenanthroimidazole‐based fluorescent sensor, 2‐(2‐(vinyloxy)phenyl)‐1 H ‐phenanthro[9,10‐ d ]imidazole, is prepared. The selectivity of the probe toward Hg 2+ ions is very high, and shows minimal interference from other commonly coexistent metal ions. The reactive stoichiometry of the probe with Hg 2+ ion is 2:1. Its detection limit is evaluated and Hg 2+ ions can be detected down to a lower limit of 2.5×10 −8 M . Moreover, the Hg 2+ ‐promoted selective hydrolysis of a vinyloxy group of the probe is further confirmed by 1 H NMR spectroscopy and mass spectrometry.