TY - JOUR
T1 - Behavior of microporous nitroprussides in presence of ammonia
AU - Reguera, E.
AU - Balmaseda, J.
AU - Rodríguez-Hernández, J.
AU - Autie, M.
AU - Gordillo, A.
AU - Yee-Madeira, H.
PY - 2004/10
Y1 - 2004/10
N2 - The behavior of microporous nitroprussides in the presence of ammonia, both in anhydrous and hydrated states, was studied using ammonia adsorption isotherms and IR, Mössbauer and XRD techniques. In their anhydrous state these materials behave as a zeolite for ammonia adsorption, however when structural water is present a decomposition process was observed. The crystallization or adsorbed water is used by ammonia to form NH4 + and OH-, creating basic conditions where the structural building unit [Fe(CN)5NO] loses the NO group to form a pentacyano complex. This leads to the formation of mixed salts, M(NH 4)[Fe(CN)5]·xH2O. For ferrous nitroprusside the formed OH- ion competes with the complex anion for the iron(2+) cation which is removed, then oxidized and finally observed as a ferric oxyhydroxide, FeOOH.
AB - The behavior of microporous nitroprussides in the presence of ammonia, both in anhydrous and hydrated states, was studied using ammonia adsorption isotherms and IR, Mössbauer and XRD techniques. In their anhydrous state these materials behave as a zeolite for ammonia adsorption, however when structural water is present a decomposition process was observed. The crystallization or adsorbed water is used by ammonia to form NH4 + and OH-, creating basic conditions where the structural building unit [Fe(CN)5NO] loses the NO group to form a pentacyano complex. This leads to the formation of mixed salts, M(NH 4)[Fe(CN)5]·xH2O. For ferrous nitroprusside the formed OH- ion competes with the complex anion for the iron(2+) cation which is removed, then oxidized and finally observed as a ferric oxyhydroxide, FeOOH.
KW - Adsorption
KW - Ammonia
KW - Infrared
KW - Microporous
KW - Mössbauer
KW - Nitroprusside
KW - Pentacyanide
UR - http://www.scopus.com/inward/record.url?scp=10044280674&partnerID=8YFLogxK
U2 - 10.1023/B:JOPO.0000046349.60983.aa
DO - 10.1023/B:JOPO.0000046349.60983.aa
M3 - Artículo
SN - 1380-2224
VL - 11
SP - 219
EP - 228
JO - Journal of Porous Materials
JF - Journal of Porous Materials
IS - 4
ER -