TY - JOUR
T1 - Light-induced electron transfer of a supramolecular bis(zinc porphyrin)-fullerene triad constructed via a diacetylamidopyridine/uracil hydrogen-bonding motif
AU - Gadde, Suresh
AU - Shafiqul Islam, D. M.
AU - Wijesinghe, Channa A.
AU - Subbaiyan, Navaneetha K.
AU - Zandler, Melvin E.
AU - Araki, Yasuyuki
AU - Ito, Osamu
AU - D'Souza, Francis
PY - 2007/8/30
Y1 - 2007/8/30
N2 - 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 DFT-MO 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 anosecond 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.
AB - 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 DFT-MO 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 anosecond 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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U2 - 10.1021/jp073918m
DO - 10.1021/jp073918m
M3 - Article
AN - SCOPUS:34548574939
VL - 111
SP - 12500
EP - 12503
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 34
ER -