Unique pore selectivity for Cs+ and exceptionally high NH4+ exchange capacity of the chalcogenide material K6Sn[Zn4Sn4S17]
| dc.contributor.author | Manos, M. J. | en |
| dc.contributor.author | Chrissafis, K. | en |
| dc.contributor.author | Kanatzidis, M. G. | en |
| dc.date.accessioned | 2015-11-24T16:51:57Z | |
| dc.date.available | 2015-11-24T16:51:57Z | |
| dc.identifier.issn | 0002-7863 | - |
| dc.identifier.uri | https://olympias.lib.uoi.gr/jspui/handle/123456789/9809 | |
| dc.rights | Default Licence | - |
| dc.subject | extra-large-pore | en |
| dc.subject | ion-exchange | en |
| dc.subject | structural-characterization | en |
| dc.subject | framework sulfide | en |
| dc.subject | porous materials | en |
| dc.subject | zeolites | en |
| dc.subject | transformation | en |
| dc.subject | geometry | en |
| dc.subject | channels | en |
| dc.subject | clusters | en |
| dc.title | Unique pore selectivity for Cs+ and exceptionally high NH4+ exchange capacity of the chalcogenide material K6Sn[Zn4Sn4S17] | en |
| heal.abstract | Highly selective ion-exchange properties and -exchange capacities of the open framework chalcogenide material K6Sn[Zn4Sn4S17] (1) with Cs+ and NH4+ are reported. Because the structure of this framework is known in great detail, these studies are a rare example where structure/property relationships can be directly drawn. 1 possesses three types of micropore cavities. The largest pore of 1 presents an exact fit for Cs+ and exhibits high selectivity for this ion, as demonstrated by competitive ion-exchange experiments. The next largest pore has a greater capacity (up to four cations) and is well suited for NH4+ ions. This leads to a high ammonium-exchange capacity for 1 of 3.06 mequiv/gr, which is close to the NH4+-exchange capacities of natural zeolites. The single-crystal structures of ammonium-exchanged products at various stages reveal an unusual mechanism for the exchange process of 1 which involves diffusion of ammonium cations from the large cavity to the small ones of the framework. Thermal analysis of one of these ammonium-exchanged products, in combination with mass spectroscopy, showed the decomposition of NH4+ cations to NH3 and H2S with the parallel transformation of the exchanged product to a mixture of crystalline phases. Since K6Sn[Zn4Sn4S17] can be grown in suitably large crystals ( much larger than most zeolites), it defines an excellent model system in which ion-exchange processes and products can be characterized and studied in detail in various reaction stages. | en |
| heal.access | campus | - |
| heal.fullTextAvailability | TRUE | - |
| heal.identifier.primary | Doi 10.1021/Ja061342t | - |
| heal.identifier.secondary | <Go to ISI>://000238728000040 | - |
| heal.identifier.secondary | http://pubs.acs.org/doi/pdfplus/10.1021/ja061342t | - |
| heal.journalName | J Am Chem Soc | en |
| heal.journalType | peer reviewed | - |
| heal.language | en | - |
| heal.publicationDate | 2006 | - |
| heal.publisher | American Chemical Society | en |
| heal.recordProvider | Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας | el |
| heal.type | journalArticle | - |
| heal.type.el | Άρθρο Περιοδικού | el |
| heal.type.en | Journal article | en |
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