Comparative study on photoinduced electron transfer from N,N-dimethylaniline (DMA) and 4,4′-methylenebis(N,N-dimethylaniline) (BDMA) to C60 and C70 in toluene

Jeunghee Park, Dongho Kim, Yung Doug Suh, Seong Keun Kim

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Photoinduced electron transfer reactions from aromatic amines to C60 and C70 were studied by steady-state fluorescence, picosecond time-resolved fluorescence, and picosecond transient absorption. The observed fluorescence quenching efficiency of amines and the change in fluorescence lifetime of fullerenes suggest the formation of a charge transfer complex between fullerenes and amines. The transient absorption spectra show that the fullerene anion and amine cation are immediately produced upon photoexcitation as an ion pair and undergo fast charge recombination to ground state. The time-resolved fluorescence spectra revealed that various amines typically show single-exponential fluorescence decay, but in the case of 4,4′-methylenebis(N,N-dimethylaniline) (BDMA) the decay was distinctly biexponential. This was interpreted as due to the bidentate complexation capability of the latter molecule, which leads to concentration-dependent mixture of monodentate and bidentate complexes, each with its own decay time.

Original languageEnglish
Pages (from-to)12715-12719
Number of pages5
JournalJournal of Physical Chemistry
Issue number48
Publication statusPublished - 1994 Jan 1


All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physical and Theoretical Chemistry

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