DC Field | Value | Language |
---|---|---|
dc.contributor.author | 박성환 | - |
dc.date.accessioned | 2018-10-17T06:01:04Z | - |
dc.date.available | 2018-10-17T06:01:04Z | - |
dc.date.issued | 2017 | - |
dc.identifier.other | OAK-2015-07670 | - |
dc.identifier.uri | http://postech.dcollection.net/jsp/common/DcLoOrgPer.jsp?sItemId=000002330317 | ko_KR |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/93858 | - |
dc.description | Master | - |
dc.description.abstract | Two novel silicon-rich silicoaluminophosphate (SAPO) molecular sieves with PHI and GIS topologies (designated as SAPO-PHI and SAPO-GIS, respectively) are synthesized using N,N-dimethylethylenediamine and N,N-dimethylpropylenediamine as organic structure-directing agents with Si/(Si + Al + P) ratios of 0.23, and 0.24, respectively. Single-crystal X-ray diffraction analysis on as-made SAPO-PHI reveals that the two identical organic moieties and one bridging water molecule are self-assembled through hydrogen-bonding thus construct a hydrogen-bonded dimer organic structure-directing agent. In addition, a combination of vibrational and multinuclear MAS NMR spectroscopies evidences the host-guest and guest-guest interactions within the two SAPO frameworks. Like the case of SAPO-PHI, SAPO-GIS exhibits the hydrogen-bonding interactions between water and organic molecules within itself, probably suggesting that they are also oriented to form a hydrogen-bonded dimer complex. Framework of both novel high silica SAPO materials is characterized by unprecedentedly high concentration of Si(OAl)4 species without any Si-rich domain, which can be attributed to the structure-directing of hydrogen-bonded aliphatic amine dimers. | - |
dc.language | eng | - |
dc.publisher | 포항공과대학교 | - |
dc.title | Hydrogen-Bonded Aliphatic Amine Dimers as Organic Structure-Directing Agents in Molecular Sieve Synthesis | - |
dc.type | Thesis | - |
dc.contributor.college | 일반대학원 환경공학부 | - |
dc.date.degree | 2017- 2 | - |
dc.type.docType | Thesis | - |
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