Citation: Feng DENG, You Ru DU, Kai Xuan WANG, Da Tong DING, Jing Zhong WANG, He Xuan Ll. ¹H-²⁷Al CP/MAS NMR STUDIES OF DEALUMINATED HZSM-5 ZEOLITE[J]. Chinese Chemical Letters, ;1993, 4(5): 453-456. shu

¹H-²⁷Al CP/MAS NMR STUDIES OF DEALUMINATED HZSM-5 ZEOLITE

a State Key Lab. of Magn. Resort. and Atomic and Mol. Phys., Wuhan Inst. of Phys., the Chinese Academy of Sciences, Wuhan, 430071;
b Department of Chemistry, Nankai University, Tianjin, 300071

Received Date: 23 November 1992

Fund Project: Project supported by the National Natural Science Fundation of China.

Recently introduced method of ¹H-²⁷Al CP/MAS was used to study the dealuminated HZSM-5 zeolite. The experimental result suggests that the resonance signal at ca. 30ppm is an independent signal (not part of a second-order quadrupolar lineshape), probably resulted from 5-coordinated non-framework aluminium (Al^NFP). The coincidence of the peaks of 4-coordinated framework (Al^F) and 4-coordinated non-framework (Al^NF) aluminium at 60ppm was confirmed by ²⁷Al MAS NMR after treating the dealuminated sample with acetylacetone (acac).
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