Valency changes of iron and tin in framework-substituted molecular sieves investigated by in situ Mossbauer spectroscopy

Authors
Lazar, K Chandwadkar, AJ Fejes, P Cejka, J Ramaswamy, AV
Citation
K. Lazar et al., Valency changes of iron and tin in framework-substituted molecular sieves investigated by in situ Mossbauer spectroscopy, J RAD NUCL, 246(1), 2000, pp. 143-148
Citations number
20
Categorie Soggetti
Inorganic & Nuclear Chemistry
Journal title
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY
ISSN journal
02365731 → ACNP
Volume
246
Issue
1
Year of publication
2000
Pages
143 - 148
Database
ISI
SICI code
0236-5731(200010)246:1<143:VCOIAT>2.0.ZU;2-Q
Abstract
Valency changes of iron and tin in framework-substituted microporous and me soporous molecular sieves (Fe-ETS-10, Fe-ZSM-5, Fe-AlPO-11, Sn-ZSM-12 and S n-MCM-41) have been studied under reducing and oxidizing conditions by in s itu Mossbauer spectroscopy. It is demonstrated that the structure of the ho st matrices strongly influences the stabilization and the oxidation state o f the ions. Debye temperature, Theta (D), data also are estimated, they sup port the suggested structural assignment of various species.