Rapid 3D NMR using the filter diagonalization method: application to oligosaccharides derivatized with 13C-labeled acetyl groups.
Rapid 3D NMR spectroscopy of oligosaccharides having isotopically labeled acetyl "isotags" was made possible with high resolution in the indirect dimensions using the filter diagonalization method (FDM). A pulse sequence was designed for the optimal correlation of acetyl methyl protons, methyl carbons, and carbonyl carbons. The multi-dimensional nature of the FDM, coupled with the advantages of constant-time evolution periods, resulted in marked improvements over Fourier transform (FT) and mirror-image linear prediction (MI-LP) processing methods. The three methods were directly compared using identical data sets. A highly resolved 3D spectrum was achieved with the FDM using a very short experimental time (28 min).
Chemistry Department, University of California, Irvine, CA 92697-2025, USA.
Geoffrey S
GS
Armstrong
Kristin E
KE
Cano
Vladimir A
VA
Mandelshtam
A J
AJ
Shaka
Brad
B
Bendiak
D008962:Models, Theoretical; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods*; D009844:Oligosaccharides / Q000737:chemistry*; D012815:Signal Processing, Computer-Assisted
D009844:Oligosaccharides