Luminescent molecular chemosensors are designed in a way that sensing
arises due to the binding of the analytes to the receptors. Here, the analyte binds to the
metal-based receptor as a ligand. Researchers all around the world have been working
to build these chemosensors to detect various analytes. These are used in many
different disciplines, including biology, physiology, chemistry, and environmental
science.Following the receptor-analyte engagement, an intercomponent process such as
energy transfer or electron transfer occurs, which specifically modifies luminophore
release and signals the recognition event. Because of their low detection limit and ease
of use, the fluorescence probes are recognized as performing unique detection methods.
This chapter discusses metal complex sensors for cation and anion detection.
Keywords: Anion sensing, Cation sensing, Luminescence, Metal complexes, Phosphorescence.
