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Abstract
This paper envisages the spectroscopic insights behind supramolecular interaction between xantheno-linked benzo-15-crown-5 (1) and fullerenes in solution. Estimation of binding constants (K) in various solvents gave rise to the highest binding affinity for C70 complex of 1 in toluene, i.e., K=133.000dm3⋅mol−1. Studies of binding as a function of solvent (K1,2-dichlorobenzene<Kchlorobenzene<Ktoluene) correlates inversely with fullerene solubility, indicating that desolvation of fullerene is a major factor for determining the magnitude of K. DFT calculations provide convincing support in favor of high value of K for C70-1 system.
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