Time-resolved EPR and Fourier transform EPR study of triplet C60. Determinations of T1 and the 13C hyperfine coupling constant

Daisy Zhang; James R. Norris; Paul J. Krusic; Edel Wasserman; C. C. Chen; Charles M. Lieber

doi:10.1021/j100124a018

Time-resolved EPR and Fourier transform EPR study of triplet C₆₀. Determinations of T₁ and the ¹³C hyperfine coupling constant

Daisy Zhang, James R. Norris^*, Paul J. Krusic, Edel Wasserman, C. C. Chen, Charles M. Lieber

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

32 Citations (Scopus)

Abstract

Continuous wave (CW) and time-resolved (TR) EPR spectra of triplet C₆₀ with partial and full ¹³C enrichment in methylcyclohexane solutions after UV irradiation were obtained. Line broadening from ¹³C satellites was observed. The ¹³C hyperfine coupling constant was determined to be 0.06 G. Fourier transform EPR (FT-EPR) experiments with a resolution of 20 ns were carried out, and T₁ was found to be 0.8 ± 0.1 μs by fitting the intensity of the free induction decay signal to the modified Bloch equations. The relaxation time from FT-EPR is in excellent agreement with estimations from the line width of CW-EPR. Because the ¹³C hyperfine coupling constant is so small, no distinct satellite lines were observed with ¹³C in natural abundance at 200 K.

Original language	English
Pages (from-to)	5886-5889
Number of pages	4
Journal	Journal of physical chemistry
Volume	97
Issue number	22
DOIs	https://doi.org/10.1021/j100124a018
Publication status	Published - 1993
Externally published	Yes

ASJC Scopus subject areas

General Engineering
Physical and Theoretical Chemistry

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@article{ec0fe657f9ff43cc830adc632711451b,

title = "Time-resolved EPR and Fourier transform EPR study of triplet C60. Determinations of T1 and the 13C hyperfine coupling constant",

abstract = "Continuous wave (CW) and time-resolved (TR) EPR spectra of triplet C60 with partial and full 13C enrichment in methylcyclohexane solutions after UV irradiation were obtained. Line broadening from 13C satellites was observed. The 13C hyperfine coupling constant was determined to be 0.06 G. Fourier transform EPR (FT-EPR) experiments with a resolution of 20 ns were carried out, and T1 was found to be 0.8 ± 0.1 μs by fitting the intensity of the free induction decay signal to the modified Bloch equations. The relaxation time from FT-EPR is in excellent agreement with estimations from the line width of CW-EPR. Because the 13C hyperfine coupling constant is so small, no distinct satellite lines were observed with 13C in natural abundance at 200 K.",

author = "Daisy Zhang and Norris, {James R.} and Krusic, {Paul J.} and Edel Wasserman and Chen, {C. C.} and Lieber, {Charles M.}",

year = "1993",

doi = "10.1021/j100124a018",

language = "English",

volume = "97",

pages = "5886--5889",

journal = "Journal of physical chemistry",

issn = "0022-3654",

publisher = "American Chemical Society",

number = "22",

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TY - JOUR

T1 - Time-resolved EPR and Fourier transform EPR study of triplet C60. Determinations of T1 and the 13C hyperfine coupling constant

AU - Zhang, Daisy

AU - Norris, James R.

AU - Krusic, Paul J.

AU - Wasserman, Edel

AU - Chen, C. C.

AU - Lieber, Charles M.

PY - 1993

Y1 - 1993

N2 - Continuous wave (CW) and time-resolved (TR) EPR spectra of triplet C60 with partial and full 13C enrichment in methylcyclohexane solutions after UV irradiation were obtained. Line broadening from 13C satellites was observed. The 13C hyperfine coupling constant was determined to be 0.06 G. Fourier transform EPR (FT-EPR) experiments with a resolution of 20 ns were carried out, and T1 was found to be 0.8 ± 0.1 μs by fitting the intensity of the free induction decay signal to the modified Bloch equations. The relaxation time from FT-EPR is in excellent agreement with estimations from the line width of CW-EPR. Because the 13C hyperfine coupling constant is so small, no distinct satellite lines were observed with 13C in natural abundance at 200 K.

AB - Continuous wave (CW) and time-resolved (TR) EPR spectra of triplet C60 with partial and full 13C enrichment in methylcyclohexane solutions after UV irradiation were obtained. Line broadening from 13C satellites was observed. The 13C hyperfine coupling constant was determined to be 0.06 G. Fourier transform EPR (FT-EPR) experiments with a resolution of 20 ns were carried out, and T1 was found to be 0.8 ± 0.1 μs by fitting the intensity of the free induction decay signal to the modified Bloch equations. The relaxation time from FT-EPR is in excellent agreement with estimations from the line width of CW-EPR. Because the 13C hyperfine coupling constant is so small, no distinct satellite lines were observed with 13C in natural abundance at 200 K.

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ER -

Time-resolved EPR and Fourier transform EPR study of triplet C₆₀. Determinations of T₁ and the ¹³C hyperfine coupling constant

Abstract

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