Calix[n]arenes with unique cavity structure is well known as 'The third generation supramolecule' followed crown ethers and cyclodextrins because it can recognize ionic and molecular guests via electrostatic, hydrogen-bonding, hydrophobic, π -π and inclusion interactions. Crown ethers and cyclodextrins stand for 'The first and second generation supramolecules', respectively. The great progress in the two generations hosts has been achieved in chemistry and supramolecular chemistry. However, in comparison w...