Heavy metal ion contamination may pose significant risks to the environment. Detection of mercury and its compounds in the environment is of great interest because of their high toxicity, wide usage in a number of industrial processes, and biomagnification in the food chain [1]. Once mercury is introduced into the food chains as a result of bioaccumulation, this environmental cycle causes serious threat to the human health and ecology [2,3]. Despite the great efforts for the reduction of its industrial use, mercury pollution still continues through a variety of natural and anthropogenic sources [2][3][4]. To date, a number of Hg 2+ ion detection methods have been examined and include colorimetric strategies [5][6][7][8] and fluroionophores [4,[9][10][11][12]. Anthraquinone dyes are the second most important class after azo dyes. Aminoanthraquinone dyes are the most important of the anthraquinone derivatives since most commercial anthraquinone dyes contain at least one amino sbstituent. For example, 1,4-diaminoanthraquinone is CI Disperse Violet 1. Anthraquinone derivatives have been widely utilized as chemosensors for several ions due to its high absorption coefficient and possibility of naked eye detection [13][14][15]. We have reported a number of different types of anthraquinone dyes for optical recording media [16][17][18]. Herein, we report new colorimetric chemosensor based on 1,2-specifically towards the Hg 2+ ion. In addition, its solvatochromic properties were investigated by qualitative spectroscopic analysis.In our present experiments, Hg(ClO4)2 was gradually added to the solution of AQ in DMSO as mercury source, and the coordination abilities of AQ with Hg 2+ were investigated by UV-Vis spectroscopy. Fig. 1 Note 1,2-Diaminoanthraquinone(AQ) Fig. 1 The changes in the absorption spectra of AQ (1 × 10 −4 mol L −1 ) upon titration with Hg 2+ in DMSO.
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