A combination of slow and fast RF field modulation for improved cross polarization in solid-state MAS NMR

被引：33

作者：

Hediger, S ^{[1
]}

Signer, P ^{[1
]}

Tomaselli, M ^{[1
]}

Ernst, RR ^{[1
]}

Meier, BH ^{[1
]}

机构：

[1] CATHOLIC UNIV NIJMEGEN,PHYS CHEM LAB,CTR MOL STRUCT DESIGN & SYNTH,NSR,NL-6525 ED NIJMEGEN,NETHERLANDS

来源：

JOURNAL OF MAGNETIC RESONANCE | 1997年 / 125卷 / 02期

关键词：

D O I：

10.1006/jmre.1997.1109

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

A method for efficient Hartmann-Hahn cross polarization under rapid magic-angle sample spinning is presented. It combines rotor-synchronized amplitude modulation of one of the two spin-lock radio-frequency fields for dipolar recoupling, with a slow adiabatic amplitude variation to enhance the net polarization transfer. The proposed scheme, called AMAP-CP, allows for cross polarization on the original Hartmann-Hahn matching condition omega(1I) = omega(1S). The polarization transfer is insensitive to chemical-shift offsets, rotation frequency, and inhomogeneity of the radiofrequency field. (C) 1997 Academic Press.

引用

页码：291 / 301

页数：11

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