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Akademický článek

Studies on the 1H NMR Spectral Features of Hydrogen Molecules in the Interstices of SiO2 Particles

Autor: WANG Xingle, SHAO Zhengze, DONG Hongchun, WEI Daxiu, CHEN Qun, YAO Yefeng

Publikováno v: Chinese Journal of Magnetic Resonance, Vol 41, Iss 3, Pp 315-321 (2024)

1H NMR spectral features of hydrogen molecules in the stacking interstices of silicon dioxide (SiO2) microspheres with different sizes are studied in the present article. The chemical shift of hydrogen molecules is observed to gradually shift towards

Externí odkaz: https://doaj.org/article/c1c052e3197c40d99d3e7cb667d91f99

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Akademický článek

Preparation Efficiency of Singlet States in Multi-spin Systems with Different Coupling Configurations

Autor: WANG Ziwen, XIN Jiaxiang, WEI Daxiu, YAO Yefeng

Publikováno v: Chinese Journal of Magnetic Resonance, Vol 41, Iss 1, Pp 67-76 (2024)

Nuclear spin singlet is a special quantum state that lasts longer than T1 and can be used to study slow diffusion and motion between molecules. The preparation of singlet states is the key to their successful application. Currently, various methods f

Externí odkaz: https://doaj.org/article/611634834def4c1eaa732aa29fb1166a

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Akademický článek

A Solid-state NMR Study of Dimethylamine Cation-doped MAPbBr3 Perovskite Materials

Autor: MA Kaiyang, QIAO Wencheng, WANG Xuelu, YAO Yefeng

Publikováno v: Chinese Journal of Magnetic Resonance, Vol 40, Iss 1, Pp 10-21 (2023)

In this paper, 2H nuclear magnetic resonance (NMR) was performed to study the motions of the embedded cations in the cation-doped lead bromide perovskite (MA0.6DMA0.4PbBr3). By selectively deuterating dimethylamine (DMA) and methylammonium (MA) catio

Externí odkaz: https://doaj.org/article/28ec07e7c7ac4f3cbfac2ec7fa6f4ece

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Akademický článek

Preparation and Lifetime Studies of the Singlet State of Five Spins in Hexene Molecules Used to Guide the Preservation of the Parahydrogen-induced Nuclear Polarization State

Autor: CI Jie, YANG Xue, XIN Jiaxiang, WEI Daxiu, YAO Yefeng

Publikováno v: Chinese Journal of Magnetic Resonance, Vol 40, Iss 1, Pp 30-38 (2023)

Parahydrogen-induced polarization (PHIP) technique can greatly enhance the sensitivity of nuclear magnetic resonance (NMR) signals, and has been applied in the fields of magnetic resonance imaging, in situ chemical reaction monitoring, etc. In additi

Externí odkaz: https://doaj.org/article/99f8f905d40d439e99d861ee28c2213b

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