Catalysis

Crystal structure

Lewis acids and bases

Inorganic chemistry

Organic chemistry

Mordenite

Zeolite

Crystallography

Brønsted–Lowry acid–base theory

Chemistry

Octahedron

Aluminium

Chemical Science

Framework-associated aluminum is demonstrated to facilitate a reversible switch between Lewis and Brønsted acidity in zeolites with the Lewis acid sites preferentially populating the side-pockets in the case of mordenite.

On the location of Lewis acidic aluminum in zeolite mordenite and the role of framework-associated aluminum in mediating the switch between Brønsted and Lewis acidity