Thallium chemical shift referencing

被引：2

作者：

Hoffman, Roy E. ^{[1
]}

机构：

[1] Hebrew Univ Jerusalem, Inst Chem, IL-9190401 Jerusalem, Israel

来源：

JOURNAL OF MAGNETIC RESONANCE | 2021年 / 326卷

关键词：

Thallium nmr; Chemical shift; 230Tl; 205Tl; NUCLEAR-MAGNETIC-RESONANCE; TL-205; NMR; GRAMICIDIN-A; ION; RELAXATION; BINDING; CONVENTIONS; TEMPERATURE; METHANOL; PROTON;

D O I：

10.1016/j.jmr.2021.106944

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Thallium chemical shifts are very sensitive to chemical and physical conditions. This makes accurate chemical shift referencing difficult. Therefore, chemical shifts are usually referenced to the H-1 reference multiplied by a standard factor. However, past papers are referenced to TlNO3 solution in water at infinite dilution. The chemical shift of TlNO3 at infinite dilution is measured accurately and found to be -22.16 and 0.75 ppm for Tl-203 and Tl-205, respectively relative to the standard frequency ratios to proton. The behavior of thallium chemical-shift with concentration and temperature are determined and discussed in relation to the degree of ionic association. (C) 2021 Elsevier Inc. All rights reserved.

引用

页数：5

共 45 条

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