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27Al and 19F Solid-State NMR Studies of Zeolite H-β Dealuminated with Ammonium Hexafluorosilicate.

✍ Scribed by Hsien-Ming Kao; Yun-Chu Chen


Publisher
John Wiley and Sons
Year
2003
Weight
58 KB
Volume
34
Category
Article
ISSN
0931-7597

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27Al quadrupole nutation and 1H27Al cro
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H-27Al cross-polarization magic-angle spinning (PC/MA.?) NMR has been used to monitor selectively the non-framework aluminium (AINF) species in dealuminated zeolite Y (Si/AI=4.0-14). \*'AI quadrupole nutation with fast ( 12.5 kHz) MASand radiofrequency excitation fields up to 220 kHz reveals resonan