Electron Donor-Acceptor Interactions of C60with n-andπ-Donors: A Rational Approach Towards its Solubility

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Abstract
Investigations on molecular interactions of C60 with a variety of solvents show that its solubility is largely controlled by efficient charge transfer interactions between electron deficient C60, with suitable n-and π-donors. Organic species having a lone pair of electron on heteroatoms (n-donors) and/or π-electron cloud (π-donors) which are capable of forming charge transfer complexes with C60, are better solvents. Solvent-C60 interaction studies thus help in the rational design of solvents and has led to the discovery of several new classes of solvents such as brominated aliphatic hydrocarbons, nitrogen heterocycles, alkylated aromatics, aryl-alkyl ethers and bromoaryl-alkyl ethers. A detailed NMR study gave insight into the nature of molecular interactions.

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