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Transition Metal Ions in Microporous Crystalline Aluminophosphates: Isomorphous Substitution
Author(s) -
Weckhuysen Bert M.,
Rao R. Ramachandra,
A. Martens Johan,
Schoonheydt Robert A.
Publication year - 1999
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/(sici)1099-0682(199904)1999:4<565::aid-ejic565>3.0.co;2-y
Subject(s) - microporous material , chemistry , molecular sieve , transition metal , substitution (logic) , hydrothermal synthesis , hydrothermal circulation , crystallography , ion , catalysis , inorganic chemistry , chemical engineering , organic chemistry , computer science , programming language , engineering
Microporous crystalline metalloaluminophosphates (MeAPO‐ n ) represent an important group of molecular sieves because of their potential catalytic and adsorptive properties. Many transition metal ions are claimed to incorporate in the framework of these molecular sieves. Here, the concept of isomorphous substitution, and the different indirect and direct tools available to verify this substitution process for Co, Cr, V, Fe and Mn are reviewed taking the AlPO 4 ‐5 structure as an example. In addition, it will be shown that transition metal ions can be used as a probe to follow the hydrothermal synthesis process of microporous aluminophosphates.