Non-linear signal detection improvement by radiation damping in single-pulse NMR spectra

Judith Schlagnitweit; Steven Morgan; Martin Nausner; Norbert Müller; Herve Desvaux

doi:10.1002/cphc.201100724

Non-linear signal detection improvement by radiation damping in single-pulse NMR spectra

Judith Schlagnitweit, Steven Morgan, Martin Nausner, Norbert Müller, Herve Desvaux

Institute of Organic Chemistry

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

Abstract

When NMR lines overlap and at least one of them is affected by radiation damping, the resonance line shapes of all lines are no longer Lorentzian. We report the appearance of narrow signal distortions, which resemble hole-burnt spectra. This new experimental phenomenon facilitates the detection of tiny signals hidden below the main resonance. Theoretical analysis based on modified Maxwell-Bloch equations shows that the presence of strong transverse magnetization creates a feedback through the coil, which influences the magnetization of all spins with overlapping resonance lines. In the time domain this leads to cross-precession terms between magnetization densities, which ultimately cause non-linear behavior. Numerical simulations corroborate this interpretation. Copyright 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original language	English
Pages (from-to)	482-487
Number of pages	6
Journal	ChemPhysChem
Volume	13
Issue number	2
DOIs	https://doi.org/10.1002/cphc.201100724
Publication status	Published - Feb 2012

Fields of science

104021 Structural chemistry
103 Physics, Astronomy

JKU Focus areas

Nano-, Bio- and Polymer-Systems: From Structure to Function
Engineering and Natural Sciences (in general)

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10.1002/cphc.201100724

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title = "Non-linear signal detection improvement by radiation damping in single-pulse NMR spectra",

abstract = "When NMR lines overlap and at least one of them is affected by radiation damping, the resonance line shapes of all lines are no longer Lorentzian. We report the appearance of narrow signal distortions, which resemble hole-burnt spectra. This new experimental phenomenon facilitates the detection of tiny signals hidden below the main resonance. Theoretical analysis based on modified Maxwell-Bloch equations shows that the presence of strong transverse magnetization creates a feedback through the coil, which influences the magnetization of all spins with overlapping resonance lines. In the time domain this leads to cross-precession terms between magnetization densities, which ultimately cause non-linear behavior. Numerical simulations corroborate this interpretation. Copyright 2012 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim.",

author = "Judith Schlagnitweit and Steven Morgan and Martin Nausner and Norbert M{\"u}ller and Herve Desvaux",

year = "2012",

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doi = "10.1002/cphc.201100724",

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T1 - Non-linear signal detection improvement by radiation damping in single-pulse NMR spectra

AU - Schlagnitweit, Judith

AU - Morgan, Steven

AU - Nausner, Martin

AU - Müller, Norbert

AU - Desvaux, Herve

PY - 2012/2

Y1 - 2012/2

N2 - When NMR lines overlap and at least one of them is affected by radiation damping, the resonance line shapes of all lines are no longer Lorentzian. We report the appearance of narrow signal distortions, which resemble hole-burnt spectra. This new experimental phenomenon facilitates the detection of tiny signals hidden below the main resonance. Theoretical analysis based on modified Maxwell-Bloch equations shows that the presence of strong transverse magnetization creates a feedback through the coil, which influences the magnetization of all spins with overlapping resonance lines. In the time domain this leads to cross-precession terms between magnetization densities, which ultimately cause non-linear behavior. Numerical simulations corroborate this interpretation. Copyright 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

AB - When NMR lines overlap and at least one of them is affected by radiation damping, the resonance line shapes of all lines are no longer Lorentzian. We report the appearance of narrow signal distortions, which resemble hole-burnt spectra. This new experimental phenomenon facilitates the detection of tiny signals hidden below the main resonance. Theoretical analysis based on modified Maxwell-Bloch equations shows that the presence of strong transverse magnetization creates a feedback through the coil, which influences the magnetization of all spins with overlapping resonance lines. In the time domain this leads to cross-precession terms between magnetization densities, which ultimately cause non-linear behavior. Numerical simulations corroborate this interpretation. Copyright 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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U2 - 10.1002/cphc.201100724

DO - 10.1002/cphc.201100724

M3 - Article

C2 - 22266720

SN - 1439-7641

VL - 13

SP - 482

EP - 487

JO - ChemPhysChem

JF - ChemPhysChem

IS - 2

ER -

Non-linear signal detection improvement by radiation damping in single-pulse NMR spectra

Abstract

Fields of science

JKU Focus areas

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