DC Field | Value | Language |
---|---|---|
dc.contributor.author | Heo, NH | - |
dc.contributor.author | Choi, HC | - |
dc.contributor.author | Jung, SW | - |
dc.contributor.author | Park, M | - |
dc.contributor.author | Seff, K | - |
dc.date.accessioned | 2016-03-31T09:16:48Z | - |
dc.date.available | 2016-03-31T09:16:48Z | - |
dc.date.created | 2012-01-30 | - |
dc.date.issued | 1997-07-10 | - |
dc.identifier.issn | 1520-6106 | - |
dc.identifier.other | 1997-OAK-0000024595 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/16939 | - |
dc.description.abstract | Indium has replaced all of the Tl+ ions in fully dehydrated fully Tl+(-)exchanged zeolite A by a solvent-free redox ion-exchange reaction with In metal at 623 K. The crystal structures of the zeolite before (Tl12Si12-Al12O48: a = 12.153(4) Angstrom, R-1 = 0.054, and R-2 = 0.060) and after the reaction, followed by washing with water and redehydration at 623 K (In10Si12Al12O48. In: a = 12.098(2) Angstrom, R-1 = 0.063, and R-2 = 0.062), have been determined by single-crystal X-ray crystallography at 294 K using the space group Pm3m. In In-10-A . In, 11 In atoms or ions/unit cell are distributed over seven crystallographically distinct positions. Seven In ions occupy 3-fold-axis equipoints: four In+ ions lie opposite 6-rings in large cavity (In(1)), and two In2+ (In(2)) and one In+ (In(3)) lie opposite 6-rings in the sodalite unit. Three In+ ions per unit cell are found at two different 8-ring positions: 1.5 on the 8-ring plane (In(4)) and 1.5 off(ln(5)). Finally, one In-0 atom per unit cell, probably associated with In ions, is found at two quite unusual positions: one-half of an In-0 lies at the center of sodalite unit (In(6)) and the other half of the In-0 is opposite a 4-ring relatively deep in the large cavity (In(7)). The crystal structure of In-10-A . In is viewed as a mixture of two kinds of ''unit cells,'' In-8-A . In and In-12-A . In, each with a cationic charge of 12+. By their approach distances to framework oxygens, the ionic radii of In+ and In2+ are ca. 1.23 and 1.04 Angstrom, respectively. The In(6) and In(7) positions lie deep within cavities where they approach only In cations. This suggests the existence of tetrahedral (In-5)(8+) clusters (four In2+ ions at In(2) with an In-0 atom at their center at In(6), In(2)-In(6) distance = 2.754(2) Angstrom in half of the sodalite units (In-8-A . In), and bent (In-3)(2+) clusters In(1)-In(7)-In(1) angle = 148.0(9)(0) and In(1)-In(7) = 3.073(8) Angstrom) in half of the large cavities (In-12-A . In). | - |
dc.description.statementofresponsibility | X | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.relation.isPartOf | JOURNAL OF PHYSICAL CHEMISTRY B | - |
dc.subject | AROMATIC-HYDROCARBONS | - |
dc.subject | PROPANE AROMATIZATION | - |
dc.subject | OPTICAL-PROPERTIES | - |
dc.subject | CDS SUPERCLUSTERS | - |
dc.subject | CLUSTERS | - |
dc.subject | CATALYSTS | - |
dc.subject | TRANSFORMATION | - |
dc.subject | POTASSIUM | - |
dc.subject | GROWTH | - |
dc.subject | CAGES | - |
dc.title | Complete redox exchange of indium for Tl+ in zeolite A. Crystal structures of anhydrous Tl-12-A and In-10-A center dot In. Indium appears as In2+, In+, and In-0. The clusters(In-5)(8+) and (In-3)(2+) are proposed | - |
dc.type | Article | - |
dc.contributor.college | 첨단재료과학부 | - |
dc.identifier.doi | 10.1021/JP970206V | - |
dc.author.google | Heo, NH | - |
dc.author.google | Choi, HC | - |
dc.author.google | Jung, SW | - |
dc.author.google | Park, M | - |
dc.author.google | Seff, K | - |
dc.relation.volume | 101 | - |
dc.relation.issue | 28 | - |
dc.relation.startpage | 5531 | - |
dc.relation.lastpage | 5539 | - |
dc.contributor.id | 10104219 | - |
dc.relation.journal | JOURNAL OF PHYSICAL CHEMISTRY B | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | JOURNAL OF PHYSICAL CHEMISTRY B, v.101, no.28, pp.5531 - 5539 | - |
dc.identifier.wosid | A1997XK23800014 | - |
dc.date.tcdate | 2019-01-01 | - |
dc.citation.endPage | 5539 | - |
dc.citation.number | 28 | - |
dc.citation.startPage | 5531 | - |
dc.citation.title | JOURNAL OF PHYSICAL CHEMISTRY B | - |
dc.citation.volume | 101 | - |
dc.contributor.affiliatedAuthor | Choi, HC | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 26 | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | AROMATIC-HYDROCARBONS | - |
dc.subject.keywordPlus | PROPANE AROMATIZATION | - |
dc.subject.keywordPlus | OPTICAL-PROPERTIES | - |
dc.subject.keywordPlus | CDS SUPERCLUSTERS | - |
dc.subject.keywordPlus | CLUSTERS | - |
dc.subject.keywordPlus | CATALYSTS | - |
dc.subject.keywordPlus | TRANSFORMATION | - |
dc.subject.keywordPlus | POTASSIUM | - |
dc.subject.keywordPlus | GROWTH | - |
dc.subject.keywordPlus | CAGES | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
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