Aluminium triplets in dealuminated zeolites detected by Al-27 NMR correlation spectroscopy

作者：Malicki Nicolas; Mali Gregor; Quoineaud Anne Agathe; Bourges Patrick; Simon Laurent J; Thibault Starzyk Frederic; Fernandez Christian^*

来源：Microporous and Mesoporous Materials, 2010, 129(1-2): 100-105.

DOI：10.1016/j.micromeso.2009.09.003

• USY zeolite
• Extra-framework aluminium
• Al-27 solid-state NMR
• Enhanced acidity

Arrangements associating three aluminium atoms in dealuminated Y zeolites are for the first time detected using a combination of multiple-quantum MAS (MQMAS) and 2D double-quantum homonuclear NMR correlation spectroscopy. From these results, we propose a model describing the enhanced Bronsted acid sites in dealuminated Y zeolite, consisting in a configuration where framework aluminium pairs are interacting with cationic extra-framework aluminium atoms.

• 出版日期2010-4-1