NMR study of paramagnetic chemical shifts of [Dy(DTPA)]2− at various concentrations in solution

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Polyhedron Pub Date : 2025-05-17 DOI:10.1016/j.poly.2025.117603

E.N. Zapolotsky , I.P. Chuikov , Jinsheng Zhang , S.P. Babailov

引用次数: 0

Abstract

The [Dy(H₂O)_n(DTPA)]²⁻ complex was studied in aqueous solution by ¹H NMR at different temperatures and concentrations. It was experimentally found that the longitudinal relaxation rates of signals in the NMR spectra of the [Dy(H₂O)_n(DTPA)]²⁻ complex are sensitive to concentration changes. It was found that the Curie-spin contribution to the lanthanide-induced enhancement in the spin–spin relaxation rate is dominant in the region of high concentrations and low temperatures. The complex can be considered as a promising NMR/MRI probe and reagent for in vitro and in vivo determination of temperature in aqueous media, as well as for temperature control during in situ studies of exothermic or endothermic processes.

查看原文本刊更多论文

溶液中不同浓度[Dy(DTPA)]2−顺磁化学位移的核磁共振研究

在不同温度和浓度的水溶液中，用1H NMR研究了[Dy(H2O)n(DTPA)]2−配合物。实验发现，[Dy(H2O)n(DTPA)]2−配合物的核磁共振波谱信号的纵向弛豫速率对浓度变化很敏感。结果表明，在高浓度低温下，居里自旋对镧系元素诱导的自旋-自旋弛豫速率增强的贡献占主导地位。该配合物可以被认为是一种有前途的NMR/MRI探针和试剂，用于体外和体内测定水介质的温度，以及在放热或吸热过程的原位研究中进行温度控制。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.