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The interaction of phenol with zeolite NaX has been studied by 1 H and 29 Si MAS and 29 Si-CP-MAS NMR spectroscopy. A large displacement of the chemical shift of hydroxyl protons from 1.2 ppm in the crystalline state to about 9 ppm occurs upon H-bonding of phenol to basic oxygen atoms of the zeolite. An enhancement of the 29 Si-CP-MAS signal is observed...
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