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Structural Characterization of Metal Ions Incorporated in Molecular Sieve Frameworks
Author(s) -
Wei AnChyi,
Chao KueiJung
Publication year - 2000
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.200000003
Subject(s) - chemistry , silanol , molecular sieve , tetrahedron , redox , metal , inorganic chemistry , characterization (materials science) , catalysis , silicate , crystallography , transition metal , ion , solvent , metal ions in aqueous solution , nanotechnology , organic chemistry , materials science
Isomorphous and non‐isomorphous substitutions of transition metal and IIIA elements for framework atoms of molecular sieves are very interesting in order to modify their acidic and redox catalytic properties. In this paper, we review the interaction between metal cations other than Al +3 with zeolitic frameworks in Ti, Co, V and Ga‐containing silicate and aluminophosphate zeolites detected by spectroscopic investigations. During synthesis and redox treatments, solvent, oxidant and surface silanol groups sometimes were found to attach to the framework metal ion sites, perhaps involved in the variation from tetrahedral to non‐tetrahedral coordinations.