Abstract
Many photo-physical studies have been reported for the detection of Hg2+ ions. Here we present the effect of Hg 2 2+ ions on the absorption and fluorescence of indole-2-carboxylic acid (I2C). Experimental evidence, supported by density functional theory B3LYP/LANL2DZ/PCM, for the formation of a I2C-Hg 2 2+ complex, is reported for the first time. It was observed that I2C forms a ground-state complex with Hg 2 2+ ions in a ratio of 3:1. The possibility of I2C to be used as a selective novel chemical sensor for the spectrophotometric detection of mercurous ions is described.
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