Application of 2-D and Dipolar Dephasing exp 13 C NMR Techniques to the Study of Structural Variations in Coal Macerals.

摘要

Data are reported on a series of whole coals and coal macerals using conventional cross-polarization magic spinning nuclear magnetic spectroscopy (CP/MAS), dipolar dephasing, and 2-D dipolar dephasing techniques. These data provide a wealth of new structural information and demonstrate that multiple pulse and 2-D spectroscopic techniques can be utilized on complex carbonaceous materials. Data obtained on maceral samples separated by the density gradient centrifugation method are also presented. 15 references, 1 figure, 1 table. (ERA citation 09:001781)