skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Energy and photoinduced electron transfer in porphyrin-fullerene dyads

Abstract

Time-resolved fluorescence and absorption techniques have been used to investigate energy and photoinduced electron transfer in a covalently linked free-base porphyrin-fullerene dyad and its zinc analogue. In toluene, the porphyrin first excited singlet states decay in about 20 ps by singlet-singlet energy transfer to the fullerene. The fullerene first excited singlet state is not quenched and undergoes intersystem crossing to the triplet, which exists in equilibrium with the porphyrin triplet state. In benzonitrile, photoinduced electron transfer from the porphyrin first excited singlet state to the fullerene competes with energy transfer. The fullerene excited singlet state is also quenched by electron transfer from the porphyrin. Overall, the charge-separated state is produced with a quantum yield approaching unity. This state lives for 290 ps in the free-base dyad and 50 ps in the zinc analog. These long lifetimes suggest that such dyads may be useful as components of more complex light-harvesting systems. 32 refs., 12 figs., 1 tab.

Authors:
; ; ; ; ;  [1]; ;  [2];  [3]
  1. Arizona State Univ., Tempe, AZ (United States)
  2. Univ. of Southern California, Los Angeles, CA (United States)
  3. Univ. of Auckland (New Zealand)
Publication Date:
OSTI Identifier:
405311
Resource Type:
Journal Article
Journal Name:
Journal of Physical Chemistry
Additional Journal Information:
Journal Volume: 100; Journal Issue: 39; Other Information: PBD: 26 Sep 1996
Country of Publication:
United States
Language:
English
Subject:
40 CHEMISTRY; FULLERENES; ELECTRON TRANSFER; PHOTOCHEMICAL REACTIONS; ABSORPTION SPECTRA; PORPHYRINS; FLUORESCENCE; EXCITED STATES; ZINC COMPOUNDS; PHOTOSYNTHESIS; ORGANIC COMPOUNDS

Citation Formats

Kuciauskas, D, Lin, S, Seely, G R, Moore, A L, Moore, T A, Gust, D, Drovetskaya, T, Reed, C A, and Boyd, P D.W. Energy and photoinduced electron transfer in porphyrin-fullerene dyads. United States: N. p., 1996. Web. doi:10.1021/jp9612745.
Kuciauskas, D, Lin, S, Seely, G R, Moore, A L, Moore, T A, Gust, D, Drovetskaya, T, Reed, C A, & Boyd, P D.W. Energy and photoinduced electron transfer in porphyrin-fullerene dyads. United States. https://doi.org/10.1021/jp9612745
Kuciauskas, D, Lin, S, Seely, G R, Moore, A L, Moore, T A, Gust, D, Drovetskaya, T, Reed, C A, and Boyd, P D.W. Thu . "Energy and photoinduced electron transfer in porphyrin-fullerene dyads". United States. https://doi.org/10.1021/jp9612745.
@article{osti_405311,
title = {Energy and photoinduced electron transfer in porphyrin-fullerene dyads},
author = {Kuciauskas, D and Lin, S and Seely, G R and Moore, A L and Moore, T A and Gust, D and Drovetskaya, T and Reed, C A and Boyd, P D.W.},
abstractNote = {Time-resolved fluorescence and absorption techniques have been used to investigate energy and photoinduced electron transfer in a covalently linked free-base porphyrin-fullerene dyad and its zinc analogue. In toluene, the porphyrin first excited singlet states decay in about 20 ps by singlet-singlet energy transfer to the fullerene. The fullerene first excited singlet state is not quenched and undergoes intersystem crossing to the triplet, which exists in equilibrium with the porphyrin triplet state. In benzonitrile, photoinduced electron transfer from the porphyrin first excited singlet state to the fullerene competes with energy transfer. The fullerene excited singlet state is also quenched by electron transfer from the porphyrin. Overall, the charge-separated state is produced with a quantum yield approaching unity. This state lives for 290 ps in the free-base dyad and 50 ps in the zinc analog. These long lifetimes suggest that such dyads may be useful as components of more complex light-harvesting systems. 32 refs., 12 figs., 1 tab.},
doi = {10.1021/jp9612745},
url = {https://www.osti.gov/biblio/405311}, journal = {Journal of Physical Chemistry},
number = 39,
volume = 100,
place = {United States},
year = {1996},
month = {9}
}