The weak interaction between C60 and molecular iodine in solution

Incorporation of the Similarly Sized Molecules, Diiodine and Carbon Disulfide, into Cocrystals Formed with the Fullerenes, C60 or C70

“…In our hands, C 70 , but not C 60 , forms a stoichiometric cocrystal with diiodine. In fact, stability constant measurements had found earlier that C 60 does not form a stable complex with diiodine in different organic solvents at room temperature . It is tempting to suppose that C 70 may have a somewhat greater preference for diiodine due to shape compatibility.…”

“…In fact, stability constant measurements had found earlier that C 60 does not form a stable complex with diiodine in different organic solvents at room temperature. 19 It is tempting to suppose that C 70 may have a somewhat greater preference for diiodine due to shape compatibility. In fact, a nearly parallel alignment of the diiodine axis with the 5-fold axis of C 70 is present in all three of these structures.…”

Molecular iodine/polymer complexes

“…The constant of the formation of C 60 .3I 2 was estimated to be 8.9. The results, mainly confined to the stability of the C 60 .3I 2 complex and the solubility dependence of C 60 on iodine concentration, were disapproved by Beck et al [356,366]. The latter authors [366], however, proved spectrophoto metrically the formation of a complex, and thermogravi metrically the covalent binding of some part of iodine.…”

“…Because of its high ioni zation potential (7.6 eV), fullerene C 60 is expected not to interact with molecular iodine under no external force. Indeed, some reports indicate the weakness of this inter action [355][356][357]. However, some molecules of about the same ionization potential such as pyrene (7.41 eV) and perlyene (7.00 eV) do act as electrondonors towards molecular iodine [358,359].…”