Light-induced electron transfer of a supramolecular bis(zinc porphyrin)-fullerene triad constructed via a diacetylamidopyridine/uracil hydrogen-bonding motif

Suresh Gadde, D. M. Shafiqul Islam, Channa A. Wijesinghe, Navaneetha K. Subbaiyan, Melvin E. Zandler, Yasuyuki Araki, Osamu Ito, Francis D'Souza

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)12500-12503
Number of pages4
JournalJournal of Physical Chemistry C
Volume111
Issue number34
DOIs
Publication statusPublished - 2007 Aug 30

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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