Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 111, Issue 34, Pages 12500-12503Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp073918m
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Using a diacetylamidopyridine/uracil complementary hydrogen-bonding motif, a novel bis(zinc porphyrin)fullerene supramolecular triad is constructed and characterized. The geometry of the triad deduced from DFTMO studies revealed the presence of the three-point hydrogen bonding and that one of the porphyrin units of the dimer is closer to the fullerene entity. Picosecond time-resolved emission and nanosecond transient absorption techniques were employed, respectively, to evaluate the kinetics of electron transfer and to characterize the electron-transfer products. The positioning of the porphyrin entity with respect to the fullerene entity ( near or far) seems to influence the kinetics of charge-separation and charge-recombination events, thus delineating the structural importance of the studied supramolecular triad in governing the electron-transfer rates.
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