Thermodynamic study on supramolecular complex formation of fullerene with calix[5]arenes in organic solvents

Thermodynamic parameters for the supramolecular complex formation of fullerene C-60 With calix[5]arene receptors are reported. The entropy change in chloroform is negative, but in toluene is positive, suggesting the tight solvation around the guest in toluene. Desolvation of the guest plays an important role in the supramolecular complex formation in toluene. (C) 2000 Elsevier Science Ltd. All rights reserved.