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Investigation of occluded and nonoccluded synthetic zeolites. Base-catalyzed demethylation of tetramethylthionine-methylene blue on a denitrated zeolite
The adsorption of methylene blue from aqueous and non-aqueous media onto the zeolite NaA, the occluded zeolite NaANaNO3 and the denitrated zeolite NaANa2O has been investigated. Adsorption isotherms have a standard form and a monolayer adsorption on the zeolite NaA is suggested on the basis of linear Langmuir plots. Demethylation of methylene blue in the presence of the denitrated zeolite has been shown from the changes in the absorption spectrum of the solution. In an alcoholic medium the demethylation is partial and yields the neutral trimethylthionine, TMT. In aqueous medium the demethylation process leads to the completely demethylated product, thionine, and the reaction occurs as a secondary process on the zeolite surface. The demethylation is base catalyzed by the activity of the strongly electronegative surface of the denitrated zeolite NaANa2O. A mechanism of demethylation in aqueous and alcoholic media has been suggested.
TY - JOUR
AU - Šušić, Milenko V.
AU - Petranović, Nadeẑda A.
AU - Miočinović, B.
PY - 1972
UR - https://cer.ihtm.bg.ac.rs/handle/123456789/4665
AB - The adsorption of methylene blue from aqueous and non-aqueous media onto the zeolite NaA, the occluded zeolite NaANaNO3 and the denitrated zeolite NaANa2O has been investigated. Adsorption isotherms have a standard form and a monolayer adsorption on the zeolite NaA is suggested on the basis of linear Langmuir plots. Demethylation of methylene blue in the presence of the denitrated zeolite has been shown from the changes in the absorption spectrum of the solution. In an alcoholic medium the demethylation is partial and yields the neutral trimethylthionine, TMT. In aqueous medium the demethylation process leads to the completely demethylated product, thionine, and the reaction occurs as a secondary process on the zeolite surface. The demethylation is base catalyzed by the activity of the strongly electronegative surface of the denitrated zeolite NaANa2O. A mechanism of demethylation in aqueous and alcoholic media has been suggested.
PB - Elsevier
T2 - Journal of Inorganic and Nuclear Chemistry
T1 - Investigation of occluded and nonoccluded synthetic zeolites. Base-catalyzed demethylation of tetramethylthionine-methylene blue on a denitrated zeolite
VL - 34
IS - 7
SP - 2349
EP - 2356
DO - 10.1016/0022-1902(72)80171-4
ER -
@article{
author = "Šušić, Milenko V. and Petranović, Nadeẑda A. and Miočinović, B.",
year = "1972",
abstract = "The adsorption of methylene blue from aqueous and non-aqueous media onto the zeolite NaA, the occluded zeolite NaANaNO3 and the denitrated zeolite NaANa2O has been investigated. Adsorption isotherms have a standard form and a monolayer adsorption on the zeolite NaA is suggested on the basis of linear Langmuir plots. Demethylation of methylene blue in the presence of the denitrated zeolite has been shown from the changes in the absorption spectrum of the solution. In an alcoholic medium the demethylation is partial and yields the neutral trimethylthionine, TMT. In aqueous medium the demethylation process leads to the completely demethylated product, thionine, and the reaction occurs as a secondary process on the zeolite surface. The demethylation is base catalyzed by the activity of the strongly electronegative surface of the denitrated zeolite NaANa2O. A mechanism of demethylation in aqueous and alcoholic media has been suggested.",
publisher = "Elsevier",
journal = "Journal of Inorganic and Nuclear Chemistry",
title = "Investigation of occluded and nonoccluded synthetic zeolites. Base-catalyzed demethylation of tetramethylthionine-methylene blue on a denitrated zeolite",
volume = "34",
number = "7",
pages = "2349-2356",
doi = "10.1016/0022-1902(72)80171-4"
}
Šušić, M. V., Petranović, N. A.,& Miočinović, B.. (1972). Investigation of occluded and nonoccluded synthetic zeolites. Base-catalyzed demethylation of tetramethylthionine-methylene blue on a denitrated zeolite. in Journal of Inorganic and Nuclear Chemistry
Elsevier., 34(7), 2349-2356.
https://doi.org/10.1016/0022-1902(72)80171-4
Šušić MV, Petranović NA, Miočinović B. Investigation of occluded and nonoccluded synthetic zeolites. Base-catalyzed demethylation of tetramethylthionine-methylene blue on a denitrated zeolite. in Journal of Inorganic and Nuclear Chemistry. 1972;34(7):2349-2356.
doi:10.1016/0022-1902(72)80171-4 .
Šušić, Milenko V., Petranović, Nadeẑda A., Miočinović, B., "Investigation of occluded and nonoccluded synthetic zeolites. Base-catalyzed demethylation of tetramethylthionine-methylene blue on a denitrated zeolite" in Journal of Inorganic and Nuclear Chemistry, 34, no. 7 (1972):2349-2356,
https://doi.org/10.1016/0022-1902(72)80171-4 . .
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