Measurement of spin-lattice relaxation times of 13C in organic solids

Jinyuan Zhou; Riqiang Fu; Jian Zhi Hu; Liyun Li; Chaohui Ye

doi:10.1016/S0926-2040(96)01283-0

Measurement of spin-lattice relaxation times of ¹³C in organic solids

Jinyuan Zhou, Riqiang Fu, Jian Zhi Hu, Liyun Li, Chaohui Ye

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

12 Scopus citations

Abstract

A transient nuclear Overhauser effect (NOE) makes measurements of the ¹³C spin-lattice relaxation times in organic solids complicated. Extended Solomon equations are applied in order to describe ¹³C spin-lattice relaxation with ¹H r.f. field irradiation. Spin-lattice relaxation under r.f. irradiation is shown to be generally a triple-exponential process, but it can be reduced to be single-exponential under stronger r.f. field irradiation as well as in the absence of ¹H initial magnetizations. Based on numerical calculations, the difference between spin-lattice relaxation curves obeying T^C₁ < T^H₁ and those obeying T^C₁ > T^H₁ is clearly indicated. The methyl group resonances in solid-state L-valine are examined, and the experimental results agree well with the theoretical results.

Original language	English (US)
Pages (from-to)	291-299
Number of pages	9
Journal	Solid State Nuclear Magnetic Resonance
Volume	7
Issue number	4
DOIs	https://doi.org/10.1016/S0926-2040(96)01283-0
State	Published - Feb 1997
Externally published	Yes

Keywords

C spin-lattice relaxation
Extended Solomon equations
H r.f. Field irradiation
Transient nuclear Overhauser effect

ASJC Scopus subject areas

Radiation
General Chemistry
Nuclear and High Energy Physics
Instrumentation

Access to Document

10.1016/S0926-2040(96)01283-0

Cite this

@article{951332bf493d4f9b95ef6ed321604d2f,

title = "Measurement of spin-lattice relaxation times of 13C in organic solids",

abstract = "A transient nuclear Overhauser effect (NOE) makes measurements of the 13C spin-lattice relaxation times in organic solids complicated. Extended Solomon equations are applied in order to describe 13C spin-lattice relaxation with 1H r.f. field irradiation. Spin-lattice relaxation under r.f. irradiation is shown to be generally a triple-exponential process, but it can be reduced to be single-exponential under stronger r.f. field irradiation as well as in the absence of 1H initial magnetizations. Based on numerical calculations, the difference between spin-lattice relaxation curves obeying TC1 < TH1 and those obeying TC1 > TH1 is clearly indicated. The methyl group resonances in solid-state L-valine are examined, and the experimental results agree well with the theoretical results.",

keywords = "C spin-lattice relaxation, Extended Solomon equations, H r.f. Field irradiation, Transient nuclear Overhauser effect",

author = "Jinyuan Zhou and Riqiang Fu and Hu, {Jian Zhi} and Liyun Li and Chaohui Ye",

note = "Funding Information: The authors thank the referees of this paper for their helpful comments.T his work was supportedb y the National Nature Science Foundation of China.",

year = "1997",

month = feb,

doi = "10.1016/S0926-2040(96)01283-0",

language = "English (US)",

volume = "7",

pages = "291--299",

journal = "Solid State Nuclear Magnetic Resonance",

issn = "0926-2040",

publisher = "Elsevier",

number = "4",

}

TY - JOUR

T1 - Measurement of spin-lattice relaxation times of 13C in organic solids

AU - Zhou, Jinyuan

AU - Fu, Riqiang

AU - Hu, Jian Zhi

AU - Li, Liyun

AU - Ye, Chaohui

N1 - Funding Information: The authors thank the referees of this paper for their helpful comments.T his work was supportedb y the National Nature Science Foundation of China.

PY - 1997/2

Y1 - 1997/2

N2 - A transient nuclear Overhauser effect (NOE) makes measurements of the 13C spin-lattice relaxation times in organic solids complicated. Extended Solomon equations are applied in order to describe 13C spin-lattice relaxation with 1H r.f. field irradiation. Spin-lattice relaxation under r.f. irradiation is shown to be generally a triple-exponential process, but it can be reduced to be single-exponential under stronger r.f. field irradiation as well as in the absence of 1H initial magnetizations. Based on numerical calculations, the difference between spin-lattice relaxation curves obeying TC1 < TH1 and those obeying TC1 > TH1 is clearly indicated. The methyl group resonances in solid-state L-valine are examined, and the experimental results agree well with the theoretical results.

AB - A transient nuclear Overhauser effect (NOE) makes measurements of the 13C spin-lattice relaxation times in organic solids complicated. Extended Solomon equations are applied in order to describe 13C spin-lattice relaxation with 1H r.f. field irradiation. Spin-lattice relaxation under r.f. irradiation is shown to be generally a triple-exponential process, but it can be reduced to be single-exponential under stronger r.f. field irradiation as well as in the absence of 1H initial magnetizations. Based on numerical calculations, the difference between spin-lattice relaxation curves obeying TC1 < TH1 and those obeying TC1 > TH1 is clearly indicated. The methyl group resonances in solid-state L-valine are examined, and the experimental results agree well with the theoretical results.

KW - C spin-lattice relaxation

KW - Extended Solomon equations

KW - H r.f. Field irradiation

KW - Transient nuclear Overhauser effect

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U2 - 10.1016/S0926-2040(96)01283-0

DO - 10.1016/S0926-2040(96)01283-0

M3 - Article

C2 - 9176934

AN - SCOPUS:0031060774

SN - 0926-2040

VL - 7

SP - 291

EP - 299

JO - Solid State Nuclear Magnetic Resonance

JF - Solid State Nuclear Magnetic Resonance

IS - 4

ER -