Abstract
The maximum entropy method (MEM) has been shown to yield one-dimensional NMR spectra with sensitivity and resolution superior to those obtained using the discrete Fourier transform (DFT) (S. Sibisi, J. Skilling, R. G. Brereton, E. D. Laue, and J. Staunton, Nature (London) 311, 446 (1984)). A property of MEM which has not been exploited in previous applications of the method to NMR is its ability to produce spectral estimates from short data records, free of the truncation artifacts which typify DFT spectra of zero-extended data records. This property holds significance for two-dimensional NMR spectroscopy, allowing reduction of the time necessary to acquire a two-dimensional data set. In this paper the application of MEM to two-dimensional NMR data is described. It is concluded that use of MEM in two-dimensional NMR studies can lead to sensitivity improvements, reduction of instrumental artifacts, and shortened data acquisition times. It is pointed out, however, that the nonlinear nature of MEM may render it unsuitable for certain applications in NMR spectroscopy.
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