Paramagnetic states and dynamics of photoexcited C{sub 60}
- Hebrew Univ. of Jerusalem (Israel)
Photoexcited triplet and photoinduced doublet states of C{sub 60}, oriented in a nematic liquid crystal (LC) and toluene, were studied by time-domain EPR. The data indicate that in both matrices, {sup 3}C{sub 60} undergoes temperature dependent molecular rotation. However, whereas in the LC the rotation rate is increased monotonously between 7 and 298 K, the dynamics in toluene depends strongly on its phase diagram. About the melting point of toluene, a polarized doublet is observed concurrently with the disappearance of the triplet. At higher temperatures, where the liquid phase prevails, the dynamics of the photoinduced doublet suggests an unpaired electron delocalized on an aggregate of C{sub 60} in toluene, with relatively long-lived magnetization of {approximately}25 {mu}s. 16 refs., 3 figs.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 555302
- Journal Information:
- Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 15 Vol. 96; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
Similar Records
Photoinduced electron transfer from triplet fullerene, [sup 3]C[sub 60], to tetracyanoethylene. Fourier transform electron paramagnetic resonance study
The photoexcited triplet state of sapphyrin dication: Unusual spin alignment in monomers and spin delocalization in dimers