@article {362,
	title = {Two-dimensional high-resolution NMR spectra in matched B-0 and B-1 field gradients},
	journal = {Journal of Magnetic Resonance},
	volume = {156},
	year = {2002},
	note = {J Magn Reson568UETimes Cited:15Cited References Count:26},
	month = {May},
	pages = {146-151},
	abstract = {<p>In a recent publication we presented a method to obtain highly resolved NMR spectra in the presence of an inhomogeneous B-0 field with the help of a matched RF gradient. If RF gradient pulses are combined with \&quot;ideal\&quot; 90degrees pulses to form inhomogeneous z rotation pulses, the line broadening caused by the B-0 gradient can be refocused, while the full chemical shift information is maintained. This approach is of potential use for NMR spectroscopy in an inhomogeneous magnetic field produced by an \&quot;ex-situ\&quot; surface spectrometer. In this contribution, we extend this method toward two-dimensional spectroscopy with high resolution in one or both dimensions. Line narrowing in the indirect dimension can be achieved by two types of nutation echoes, thus leading to depth-sensitive NMR spectra with full chemical shift information. If the nutation echo in the indirect dimension is combined with a stroboscopic acquisition using inhomogeneous z-rotation pulses, highly resolved two-dimensional correlation spectra can be obtained in matched field gradients. Finally, we demonstrate that an INEPT coherence transfer from proton to carbon spins is possible in inhomogeneous B-0 fields. Thus, it is possible to obtain one-dimensional C-13 NMR spectra with increased sensitivity and two-dimensional HETCOR spectra in the presence of B-0 gradients of 0.4 mT/cm. These schemes may be of some value for ex-situ NMR analysis of materials and biological systems. (C) 2002 Elsevier Science (USA).</p>
},
	keywords = {echoes},
	isbn = {1090-7807},
	doi = {Doi 10.1006/Jmre.2002.2545},
	url = {<Go to ISI>://WOS:000176562100016},
	author = {Heise, H. and Sakellariou, D. and Meriles, C. A. and Moule, A. and Pines, A.}
}
