FT-EPR study of triplet state C60. Spin dynamics and electron transfer quenching

Carlos A. Steren, Patricia R. Levstein, Hans van Willigen, Henry Linschitz, L. Biczók

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

A FT-EPR study was made of paramagnetic species formed by pulsed-laser excitation of C60 in fluid solution. Earlier findings that photoexcitation of C60 in fluid solution gives rise to an EPR signal with narrow linewidth were confirmed. The lifetime of the signal corresponds to that of the C60 triplet as measured by flash photolysis. In the presence of donors, the rate of signal decay is increased and matches the growing in of EPR signals from oxidized donors. The time dependence of the FT-EPR spectra gives values for electron transfer rate constants which agree with those derived from flash photolysis measurements on the same systems. Based on these findings, we assign the narrow line signal to the triplet of C60. The time evolution of the FT-EPR signal establishes that the triplets are born with less spin polarization that the thermal equilibrium value. As a result, signal growth is controlled by spin-lattice relaxation.

Original languageEnglish
Pages (from-to)23-28
Number of pages6
JournalChemical Physics Letters
Volume204
Issue number1-2
DOIs
Publication statusPublished - Mar 12 1993

Fingerprint

Spin dynamics
spin dynamics
atomic energy levels
Paramagnetic resonance
Quenching
electron transfer
quenching
Electrons
Photolysis
flash
photolysis
Spin polarization
Laser excitation
Fluids
Spin-lattice relaxation
Photoexcitation
Pulsed lasers
Linewidth
Rate constants
fluids

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Spectroscopy
  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Surfaces and Interfaces

Cite this

FT-EPR study of triplet state C60. Spin dynamics and electron transfer quenching. / Steren, Carlos A.; Levstein, Patricia R.; van Willigen, Hans; Linschitz, Henry; Biczók, L.

In: Chemical Physics Letters, Vol. 204, No. 1-2, 12.03.1993, p. 23-28.

Research output: Contribution to journalArticle

Steren, Carlos A. ; Levstein, Patricia R. ; van Willigen, Hans ; Linschitz, Henry ; Biczók, L. / FT-EPR study of triplet state C60. Spin dynamics and electron transfer quenching. In: Chemical Physics Letters. 1993 ; Vol. 204, No. 1-2. pp. 23-28.
@article{5aac53653089418381b517f129f1c466,
title = "FT-EPR study of triplet state C60. Spin dynamics and electron transfer quenching",
abstract = "A FT-EPR study was made of paramagnetic species formed by pulsed-laser excitation of C60 in fluid solution. Earlier findings that photoexcitation of C60 in fluid solution gives rise to an EPR signal with narrow linewidth were confirmed. The lifetime of the signal corresponds to that of the C60 triplet as measured by flash photolysis. In the presence of donors, the rate of signal decay is increased and matches the growing in of EPR signals from oxidized donors. The time dependence of the FT-EPR spectra gives values for electron transfer rate constants which agree with those derived from flash photolysis measurements on the same systems. Based on these findings, we assign the narrow line signal to the triplet of C60. The time evolution of the FT-EPR signal establishes that the triplets are born with less spin polarization that the thermal equilibrium value. As a result, signal growth is controlled by spin-lattice relaxation.",
author = "Steren, {Carlos A.} and Levstein, {Patricia R.} and {van Willigen}, Hans and Henry Linschitz and L. Bicz{\'o}k",
year = "1993",
month = "3",
day = "12",
doi = "10.1016/0009-2614(93)85600-S",
language = "English",
volume = "204",
pages = "23--28",
journal = "Chemical Physics Letters",
issn = "0009-2614",
publisher = "Elsevier",
number = "1-2",

}

TY - JOUR

T1 - FT-EPR study of triplet state C60. Spin dynamics and electron transfer quenching

AU - Steren, Carlos A.

AU - Levstein, Patricia R.

AU - van Willigen, Hans

AU - Linschitz, Henry

AU - Biczók, L.

PY - 1993/3/12

Y1 - 1993/3/12

N2 - A FT-EPR study was made of paramagnetic species formed by pulsed-laser excitation of C60 in fluid solution. Earlier findings that photoexcitation of C60 in fluid solution gives rise to an EPR signal with narrow linewidth were confirmed. The lifetime of the signal corresponds to that of the C60 triplet as measured by flash photolysis. In the presence of donors, the rate of signal decay is increased and matches the growing in of EPR signals from oxidized donors. The time dependence of the FT-EPR spectra gives values for electron transfer rate constants which agree with those derived from flash photolysis measurements on the same systems. Based on these findings, we assign the narrow line signal to the triplet of C60. The time evolution of the FT-EPR signal establishes that the triplets are born with less spin polarization that the thermal equilibrium value. As a result, signal growth is controlled by spin-lattice relaxation.

AB - A FT-EPR study was made of paramagnetic species formed by pulsed-laser excitation of C60 in fluid solution. Earlier findings that photoexcitation of C60 in fluid solution gives rise to an EPR signal with narrow linewidth were confirmed. The lifetime of the signal corresponds to that of the C60 triplet as measured by flash photolysis. In the presence of donors, the rate of signal decay is increased and matches the growing in of EPR signals from oxidized donors. The time dependence of the FT-EPR spectra gives values for electron transfer rate constants which agree with those derived from flash photolysis measurements on the same systems. Based on these findings, we assign the narrow line signal to the triplet of C60. The time evolution of the FT-EPR signal establishes that the triplets are born with less spin polarization that the thermal equilibrium value. As a result, signal growth is controlled by spin-lattice relaxation.

UR - http://www.scopus.com/inward/record.url?scp=0002126268&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0002126268&partnerID=8YFLogxK

U2 - 10.1016/0009-2614(93)85600-S

DO - 10.1016/0009-2614(93)85600-S

M3 - Article

AN - SCOPUS:0002126268

VL - 204

SP - 23

EP - 28

JO - Chemical Physics Letters

JF - Chemical Physics Letters

SN - 0009-2614

IS - 1-2

ER -