DC Field | Value | Language |
---|---|---|
dc.contributor.author | Shin, K | ko |
dc.contributor.author | Park, Y | ko |
dc.contributor.author | Hong, JH | ko |
dc.contributor.author | Lee, Huen | ko |
dc.date.accessioned | 2009-06-16T08:57:22Z | - |
dc.date.available | 2009-06-16T08:57:22Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2007-09 | - |
dc.identifier.citation | KOREAN JOURNAL OF CHEMICAL ENGINEERING, v.24, no.5, pp.843 - 846 | - |
dc.identifier.issn | 0256-1115 | - |
dc.identifier.uri | http://hdl.handle.net/10203/9476 | - |
dc.description.abstract | In the present study, measurements and analyses were made of the High-Power Decoupling (HPDEC) solid-state C-13 NMR spectra of structure-H (sH) methane hydrates with isopentane, one of the simplest and smallest acyclic large guest molecules, and methylcyclohexane (MCH), a commonly used cyclic guest molecule that is larger than isopentane. From the spectroscopic information, clear and definite evidence for the molecular conformation of acyclic guest molecules that are sufficiently small so as to be entrapped into the structure-H large cage (sH-L) was expected. The C-13 NMR chemical shift change was additionally checked through the use of a hydrogen-hydrogen steric perturbation model. From the overall results, we concluded that one of the smallest acyclic guest molecules, isopentane, participating in the formation of a structure-H clathrate hydrate is encaged, confirming the gauche conformation in large cavities. The present results strongly suggest that the guest position and structure in hydrate cages are greatly influenced by both short-range interactions between guest molecules and cage frameworks and long-range interactions between small and large guests. Accordingly, cage dynamics must be carefully considered when a specific sH hydrate is designed and synthesized for the purpose of tuning material properties. | - |
dc.description.sponsorship | This research was performed by the Korea Science and Engineering Foundation (KOSEF) through the National Research Lab. Program funded by the Ministry of Science and Technology (R0A- 2005-000-10074-0(2007)) and the Gas Hydrate Research and Development Project funded by the Ministry of Commerce, Industry, and Energy of Korea. It was also partially supported by the Brain Korea 21 Project. | en |
dc.language | English | - |
dc.language.iso | en_US | en |
dc.publisher | KOREAN INST CHEM ENGINEERS | - |
dc.title | Gauche conformation of acyclic guest molecules appearing in the large cages of structure-H clathrate hydrates | - |
dc.type | Article | - |
dc.identifier.wosid | 000250077100020 | - |
dc.identifier.scopusid | 2-s2.0-36849045733 | - |
dc.type.rims | ART | - |
dc.citation.volume | 24 | - |
dc.citation.issue | 5 | - |
dc.citation.beginningpage | 843 | - |
dc.citation.endingpage | 846 | - |
dc.citation.publicationname | KOREAN JOURNAL OF CHEMICAL ENGINEERING | - |
dc.identifier.doi | 10.1007/s11814-007-0051-5 | - |
dc.embargo.liftdate | 9999-12-31 | - |
dc.embargo.terms | 9999-12-31 | - |
dc.contributor.localauthor | Lee, Huen | - |
dc.contributor.nonIdAuthor | Shin, K | - |
dc.contributor.nonIdAuthor | Park, Y | - |
dc.contributor.nonIdAuthor | Hong, JH | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | structure-H | - |
dc.subject.keywordAuthor | clathrate hydrate | - |
dc.subject.keywordAuthor | large guest molecule substance | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.