DC Field | Value | Language |
---|---|---|
dc.contributor.author | Yu, JS | - |
dc.contributor.author | Kim, SJ | - |
dc.contributor.author | Hong, SB | - |
dc.contributor.author | Kevan, L | - |
dc.date.accessioned | 2016-04-01T08:18:27Z | - |
dc.date.available | 2016-04-01T08:18:27Z | - |
dc.date.created | 2010-01-06 | - |
dc.date.issued | 1996-03-07 | - |
dc.identifier.issn | 0956-5000 | - |
dc.identifier.other | 1996-OAK-0000019628 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/27680 | - |
dc.description.abstract | The interaction of Cu-II with deuteriated adsorbates in Cu-II-exchanged gallosilicate with the zeolite L channel-type structure has been investigated by EPR and electron spin echo modulation (ESEM) spectroscopies, and compared with that in Cu-II-exchanged K-L aluminosilicate zeolite. Similar results to those for CuK-L aluminosilicate were observed in CuK-L gallosilicate. It was found that, in the fresh hydrated material, Cu-II is octahedrally coordinated to six water molecules. This species is located in the main channels and rotates rapidly at room temperature. A minor Cu-II diaquo species seen in the aluminosilicate is not observed in the gallosilicate. Evacuation at room temperature removes three of these water molecules, leaving the Cu-II coordinated to three water molecules and anchored to the zeolite lattice by coordination to zeolitic oxygens in an eight-ring; the coordinated water is removed more easily in the gallosilicate than in the aluminosilicate. Upon further evacuation at increasing temperature, Cu-II moves from the main channel towards recessed sites. Dehydration at 400 degrees C produces one Cu-II species located in recessed sites, as evidenced by a lack of broadening of its EPR lines by oxygen. Adsorption of polar molecules such as water and alcohols causes changes in the EPR spectrum of the Cu-II indicating migration into the main channels where adsorbate coordination can occur. Ethene also coordinates with Cu-II but causes less migration. Cu-II forms complexes with two molecules of methanol and ethanol, and with one molecule of ethene, as evidenced by ESEM data, which is the same as for Cu-II in CuK-L aluminosilicate zeolite. | - |
dc.description.statementofresponsibility | X | - |
dc.language | English | - |
dc.publisher | Royal Society of Chemistry | - |
dc.relation.isPartOf | JOURNAL OF THE CHEMICAL SOCIETY FARADAY TRANSACTIONS | - |
dc.subject | STRUCTURAL CHARACTERIZATION | - |
dc.subject | Y-ZEOLITE | - |
dc.subject | RESONANCE | - |
dc.subject | COPPER(II) | - |
dc.subject | CATALYSTS | - |
dc.subject | SIMULATION | - |
dc.subject | OXIDATION | - |
dc.subject | SPECTRA | - |
dc.subject | MAZZITE | - |
dc.title | Electron Spin Resonance and Electron Spin Echo Modulation Spectroscopies of Cupric Ion Species in Cu(II)-Exchanged K-L Gallosilicate | - |
dc.type | Article | - |
dc.contributor.college | 환경공학부 | - |
dc.identifier.doi | 10.1039/ft9969200855 | - |
dc.author.google | Yu, JS | - |
dc.author.google | Kim, SJ | - |
dc.author.google | Hong, SB | - |
dc.author.google | Kevan, L | - |
dc.relation.startpage | 855 | - |
dc.relation.lastpage | 860 | - |
dc.contributor.id | 10077624 | - |
dc.relation.journal | JOURNAL OF THE CHEMICAL SOCIETY FARADAY TRANSACTIONS | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | JOURNAL OF THE CHEMICAL SOCIETY FARADAY TRANSACTIONS, v.92, no.5, pp.855 - 860 | - |
dc.identifier.wosid | A1996UA86500021 | - |
dc.date.tcdate | 2019-02-01 | - |
dc.citation.endPage | 860 | - |
dc.citation.number | 5 | - |
dc.citation.startPage | 855 | - |
dc.citation.title | JOURNAL OF THE CHEMICAL SOCIETY FARADAY TRANSACTIONS | - |
dc.citation.volume | 92 | - |
dc.contributor.affiliatedAuthor | Hong, SB | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 7 | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | STRUCTURAL CHARACTERIZATION | - |
dc.subject.keywordPlus | Y-ZEOLITE | - |
dc.subject.keywordPlus | RESONANCE | - |
dc.subject.keywordPlus | COPPER(II) | - |
dc.subject.keywordPlus | CATALYSTS | - |
dc.subject.keywordPlus | SIMULATION | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | SPECTRA | - |
dc.subject.keywordPlus | MAZZITE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Physics, Atomic, Molecular & Chemical | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Physics | - |
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