Supramolecules and Host Guest Chemistry

Supramolecular chemistry also very familiar as “Chemistry beyond the molecules”. It also focuses on molecular frameworks with a discrete no of components or subunits. Forces including hydrogen bonding, metal coordination, Van der waals forces, Electrostatic effects, pi-pi interactions, hydrophobic forces etc. mainly responsible for the spatial arrangements between the coupling molecular components. Accordingly, the development of molecular sensors for differential detection became most encouraging applications of such host-guest recognition. Host guest systems have been utilized to remove hazardous materials from the environment. They can be made in different sizes and different shapes to trap a variety of chemical guests. Traditionally, chemical sensing has been approached with a system that contains a covalently bound indicator to a receptor through a linker. Once the analyte binds the indicator changes its photo-physical properties.