Design and synthesis of novel chemosensor based on rhodamine 6G monitoring heavy metal ions

Abstract

One of the organic dye materials which has long been investigated is regarded as rhodamine 6G dye class. This dye material shows a special attractive intention with considerable interests due to the reason of its promising photochemical properties such as clear photoabsorption and emission characteristics. In this study, a novel fluorescent dye compound based on rhodamine 6G derivative was designed and synthesised through the reaction of rhodamine 6G hydrazide and indole-3-carboxaldehdyde. The resulting absorption and fluorescent emission spectra of this chemosensor were determined on the properties of sensing function towards Hg2+. This chemosensor 1 was also investigated on the binding ratio between chemosensor 1 towards Hg2+ using Job's method. Related electron density and energy state of the dye compound were also characterised by computational calculations.