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Investigation of occluded and nonoccluded synthetic zeolites. Base-catalyzed demethylation of tetramethylthionine-methylene blue on a denitrated zeolite
dc.creator | Šušić, Milenko V. | |
dc.creator | Petranović, Nadeẑda A. | |
dc.creator | Miočinović, B. | |
dc.date.accessioned | 2021-05-26T13:06:45Z | |
dc.date.available | 2021-05-26T13:06:45Z | |
dc.date.issued | 1972 | |
dc.identifier.issn | 0022-1902 | |
dc.identifier.uri | https://cer.ihtm.bg.ac.rs/handle/123456789/4665 | |
dc.description.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. | sr |
dc.language.iso | en | sr |
dc.publisher | Elsevier | sr |
dc.rights | restrictedAccess | sr |
dc.source | Journal of Inorganic and Nuclear Chemistry | sr |
dc.subject | zeolite | sr |
dc.subject | occluded and nonoccluded synthetic zeolites | sr |
dc.subject | demethylation | sr |
dc.subject | denitrated zeolite | sr |
dc.title | Investigation of occluded and nonoccluded synthetic zeolites. Base-catalyzed demethylation of tetramethylthionine-methylene blue on a denitrated zeolite | sr |
dc.type | article | sr |
dc.rights.license | ARR | sr |
dcterms.abstract | Шушић, Миленко В.; Петрановић, Надеẑда A.; Миочиновић, Б.; | |
dc.citation.volume | 34 | |
dc.citation.issue | 7 | |
dc.citation.spage | 2349 | |
dc.citation.epage | 2356 | |
dc.identifier.doi | 10.1016/0022-1902(72)80171-4 | |
dc.identifier.scopus | 2-s2.0-0042766445 | |
dc.type.version | publishedVersion | sr |