Local diffusion in paramagnetic solutions by NMR relaxometry at one frequency

被引：7

作者：

Melchior, Andrea ^{[1
]}

Fries, Pascal H. ^{[1
]}

机构：

[1] CEA, Dept Rech Fondamentale Mat Condensee, DSM, UMRE 3,UJF,Serv Chim Inorgan & Biol,Lab Reconnais, F-38054 Grenoble 9, France

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2006年 / 128卷 / 23期

关键词：

D O I：

10.1021/ja061235z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The relative diffusion coefficient D of a paramagnetic species and a diamagnetic probe molecule bearing nuclear spins is obtained from their measured relaxation times T1 and T2 (or T1ρ). This is achieved by introducing the longitudinal relaxivity, r1, a linear expression of 1/T1, and the mixed relaxivity, rmix, a linear expression of 1/T1 and 1/T2 (or 1/T1ρ). Under weak assumptions, D is proportional to (rmix - r1) to the power -2/3 and to rmix to the power -1, with easy-to-determine proportionality factors. The method is noninvasive and easy to use on standard NMR spectrometers and imagers. It is validated through the study of various solutions of a Gd(III)-based contrast agent for magnetic resonance imaging. Copyright © 2006 American Chemical Society.

引用

收藏

页码：7424 / 7425

页数：2

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