Magnetic susceptibility measurement by NMR: 2. The magnetic susceptibility of NMR solvents and their chemical shifts

被引：12

作者：

Hoffman, Roy ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Inst Chem, Edmond Y Safra Campus, IL-9190401 Jerusalem, Israel

来源：

JOURNAL OF MAGNETIC RESONANCE | 2022年 / 335卷

关键词：

NMR spectroscopy; Chemical shift; Magnetic susceptibility; Chemical shift referencing; TMS; Tetramethylsilane; NMR solvent; Chemical shift standard; TEMPERATURE-DEPENDENCE; MOLECULAR-COMPLEXES; INTERNAL REFERENCE; DIELECTRIC POLARIZATION; BENZENE; SPECTROSCOPY; CONSTANTS; LIQUID; STANDARDIZATION; DIAMAGNETISM;

D O I：

10.1016/j.jmr.2021.107105

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Most routine H-1 NMR spectroscopy references the chemical shift of TMS to zero. However, its chemical shift varies with solvent and environmental conditions. Chemical shifts and magnetic susceptibilities of TMS and several NMR solvents are accurately measured over a range of temperatures. Methods for improving the measurements of chemical shifts and magnetic susceptibilities are developed and demonstrated. This makes it possible to compare chemical shifts of compounds between solvents, improving the accuracy of solvent effect measurements. The effects of polarizability and aromaticity on the chemical shift of TMS are shown. The molar magnetic susceptibilities of the deuterated solvents are similar to those of the regular protiated solvents. (C) 2021 Elsevier Inc. All rights reserved.

引用

页数：9

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