Study of Charge Transfer Interactions of a Resorcin[4]arene with [60]- and [70]Fullerenes by the Absorption Spectrometric Method

摘要

The resorcin[4]arene host compound 2,8,14,20-tetrapentadecylpentacyclo [19.3.1.1.~(3,7)l.~(9,13)l~(15,19)]octacosa-l(25),3,5,7(28),9,11,13(27),15,17,19(26),21,23-dodecaene-4,6,10,12,16,18,22,24-octol (1) has been shown to form charge-transfer complexes with a series of electron acceptors including [60]- and [70]fullerenes,and from the trends in CT transition energies the vertical ionization potential of 1 has been estimated (7.62 eV).By the UV-vis spectrophotometric method it has been shown that 1 forms an inclusion complex of 2(resorcinarene):l(fullerene) stoichiometry besides showing CT absoption bands.On the other hand,1 does not include [70]fullerene and forms with it a simple CT type of molecular complex.This has been established by determining formation constants and enthalpies and entropies of complexation.It has been shown that inclusion of [60]fullerene is a predominantly entropy-driven process.