Hello Abhinash Kumar Panigrahi

Crown ethers are cyclic chemical compounds that consist of a ring containing several ether groups. They strongly bind certain cations, forming complexes. The oxygen atoms are well situated to coordinate with a cation located at the interior of the ring, whereas the exterior of the ring is hydrophobic.

Function of crown ether are

• The cations form salts that are soluble in nonpolar solvents, and for this reason crown ethers are useful in phase transfer catalysis.
• The denticity of the polyether influences the affinity of the crown ether for various cations.
• Similar in function to the natural product valinomycin.

Hope it helps you.