日本ゼオライト学会　刊行物 Publication of Japan Zeolite Association

Within about 15 years, high-resolution solid-state NMR has developed and has been widespread into an effective means of elucidating suitable detail information on the micro-environments of a range of various types of solid materials including zeolites and their families. For example, it is possible to calculate the silicon to aluminum ratio of zeolitic framework from the ²⁹Si-magic angle spinning (MAS) spectrum, while the ²⁷Al-MAS spectrum gives information on the cordination states. In this review, a background of progress of solid-state NMR in relation to an advant of new zeolitic materials was briefly summarized. Moreover the usefulness of the doble rotation (DOR) NMR, new meaningful technique which averages the anisotropy of the second-order quadrupolar interactions, and the applicability to the distinction of Al–O sites of zeolites were described by comparison with usual MAS method.