Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Through-bond and through-space radiofrequency amplification by stimulated emission of radiation. / Trofimov, Ivan A.; Salnikov, Oleg G.; Pravdivtsev, Andrey N. и др.
в: Communications Chemistry, Том 7, № 1, 235, 23.10.2024.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Through-bond and through-space radiofrequency amplification by stimulated emission of radiation
AU - Trofimov, Ivan A.
AU - Salnikov, Oleg G.
AU - Pravdivtsev, Andrey N.
AU - de Maissin, Henri
AU - Yi, Anna P.
AU - Chekmenev, Eduard Y.
AU - Hövener, Jan Bernd
AU - Schmidt, Andreas B.
AU - Koptyug, Igor V.
PY - 2024/10/23
Y1 - 2024/10/23
N2 - Radio Amplification by Stimulated Emission of Radiation (RASER) is a phenomenon observed during nuclear magnetic resonance (NMR) experiments with strongly negatively polarized systems. This phenomenon may be utilized for the production of very narrow NMR lines, background-free NMR spectroscopy, and excitation-free sensing of chemical transformations. Recently, novel methods of producing RASER by ParaHydrogen-Induced Polarization (PHIP) were introduced. Here, we show that pairwise addition of parahydrogen to various propargylic compounds induces RASER activity of other protons beyond those chemically introduced in the reaction. In high-field PHIP, negative polarization initiating RASER is transferred via intramolecular cross-relaxation. When parahydrogen is added in Earth’s field followed by adiabatic transfer to a high field, RASER activity of other protons is induced via both J-couplings and cross-relaxation. This through-bond and through-space induction of RASER holds potential for the ongoing development and expansion of RASER applications and can potentially enhance spectral resolution in two-dimensional NMR spectroscopy techniques.
AB - Radio Amplification by Stimulated Emission of Radiation (RASER) is a phenomenon observed during nuclear magnetic resonance (NMR) experiments with strongly negatively polarized systems. This phenomenon may be utilized for the production of very narrow NMR lines, background-free NMR spectroscopy, and excitation-free sensing of chemical transformations. Recently, novel methods of producing RASER by ParaHydrogen-Induced Polarization (PHIP) were introduced. Here, we show that pairwise addition of parahydrogen to various propargylic compounds induces RASER activity of other protons beyond those chemically introduced in the reaction. In high-field PHIP, negative polarization initiating RASER is transferred via intramolecular cross-relaxation. When parahydrogen is added in Earth’s field followed by adiabatic transfer to a high field, RASER activity of other protons is induced via both J-couplings and cross-relaxation. This through-bond and through-space induction of RASER holds potential for the ongoing development and expansion of RASER applications and can potentially enhance spectral resolution in two-dimensional NMR spectroscopy techniques.
UR - https://www.webofscience.com/wos/woscc/full-record/WOS:001333847100001
UR - https://www.mendeley.com/catalogue/71df6c78-32b3-3c4e-9287-2b3d3def6ffa/
U2 - 10.1038/s42004-024-01313-0
DO - 10.1038/s42004-024-01313-0
M3 - Article
C2 - 39414912
VL - 7
JO - Communications Chemistry
JF - Communications Chemistry
SN - 2399-3669
IS - 1
M1 - 235
ER -
ID: 61254438