Enhanced triple-quantum excitation in 13C magic-angle spinning NMR

被引：10

作者：

Carravetta, M

Günne, JSAD

Levitt, MH ^{[1
]}

机构：

[1] Univ Southampton, Dept Chem, Southampton SO17 1BJ, Hants, England

[2] Stockholm Univ, Div Phys Chem, S-10691 Stockholm, Sweden

[3] Univ Bonn, Inst Anorgan Chem, D-5300 Bonn, Germany

来源：

JOURNAL OF MAGNETIC RESONANCE | 2003年 / 162卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1016/S1090-7807(03)00059-4

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

We describe a new method for exciting triple-quantum coherences in C-13-labelled powder samples under MAS. The proposed method combines selective double-quantum excitation with rotational resonance and frequency-selective composite pulses. The spin dynamics of this new method are described theoretically. Numerical calculations of the spin dynamics are compared to experimental results on fully C-13-labelled (L)-alanine. The observed triple-quantum filtering efficiency is around 10% for the most intense spectral peak. The method is also demonstrated on other fully C-13-labelled compounds, including a uniformly C-13-labelled amino acid. (C) 2003 Elsevier Science (USA). All rights reserved.

引用

页码：443 / 453

页数：11