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Spectroscopy of the Formation of Microporous Transition Metal Ion Containing Aluminophosphates under Hydrothermal Conditions
Author(s) -
Weckhuysen Bert M.,
Baetens David,
Schoonheydt Robert A.
Publication year - 2000
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/1521-3773(20001002)39:19<3419::aid-anie3419>3.0.co;2-r
Subject(s) - molecular sieve , microporous material , hydrothermal circulation , hydrothermal synthesis , electron paramagnetic resonance , crystallization , chemistry , diffuse reflectance infrared fourier transform , transition metal , spectroscopy , ion , diffuse reflection , coordination complex , inorganic chemistry , chemical engineering , metal , photochemistry , organic chemistry , catalysis , nuclear magnetic resonance , adsorption , photocatalysis , physics , quantum mechanics , optics , engineering
The coordination environment of transition metal ions can be monitored during the synthesis of molecular sieves at high pressures and temperatures by using the apparatus shown, which allows the measurement of diffuse reflectance and electron spin resonance spectra in situ. The spectroscopic data obtained allow a better understanding of the hydrothermal crystallization process of CoAPO‐5 molecular sieves in terms of the coordination chemistry of Co 2+ in the synthesis gel.