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CO2/Propylene Oxide Copolymerization with a Bifunctional Catalytic System Composed of Multiple Ammonium Salts and a Salen Cobalt Complex Containing Sulfonate Anions
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 이분열 | - |
| dc.contributor.author | 현용빈 | - |
| dc.date.accessioned | 2022-11-29T03:01:03Z | - |
| dc.date.available | 2022-11-29T03:01:03Z | - |
| dc.date.issued | 2022-02 | - |
| dc.identifier.other | 31452 | - |
| dc.identifier.uri | https://dspace.ajou.ac.kr/handle/2018.oak/20690 | - |
| dc.description | 학위논문(석사)--아주대학교 일반대학원 :분자과학기술학과,2022. 2 | - |
| dc.description.tableofcontents | 1 Introduction 1 2 Experimental Section 3 2.1 General Remarks 3 2.2 Preparation of 1 3 2.3 Preparation of 2 [X = I] 4 2.4 Preparation of 3 [X = I] 4 2.5 Preparation of 4 [X = I] 5 2.6 Preparation of 5 [X = I] 5 2.7 Conversion of 4 [X = I] to 4 [X = DNP] 6 2.8 Preperation of 6 6 2.9 Preperation of 7 6 2.10 Preperation of 8 7 2.11 Preperation of 9 7 2.12 Preperation of 10 7 2.13 Preperation of 11 8 2.14 Preparation of a mixture of 12 and 10 8 2.15 Preparation of a mixture of 13 and 11 9 2.16 Preperation of 14 10 2.17 Typical procedure for CO2/PO copolymerization 10 3 Result and Discussion 11 3.1 Preparation of multiple ammonium salts 11 3.2 Preparation of (Salen)Co(III) complexes tethering sulfonate anion groups 13 3.3 CO2/propylene oxide copolymerization 16 4 Conclusion 19 5 Acknowledgements 19 6 Reference 20 | - |
| dc.language.iso | eng | - |
| dc.publisher | The Graduate School, Ajou University | - |
| dc.rights | 아주대학교 논문은 저작권에 의해 보호받습니다. | - |
| dc.title | CO2/Propylene Oxide Copolymerization with a Bifunctional Catalytic System Composed of Multiple Ammonium Salts and a Salen Cobalt Complex Containing Sulfonate Anions | - |
| dc.type | Thesis | - |
| dc.contributor.affiliation | 아주대학교 일반대학원 | - |
| dc.contributor.department | 일반대학원 분자과학기술학과 | - |
| dc.date.awarded | 2022. 2 | - |
| dc.description.degree | Master | - |
| dc.identifier.localId | 1245048 | - |
| dc.identifier.uci | I804:41038-000000031452 | - |
| dc.identifier.url | https://dcoll.ajou.ac.kr/dcollection/common/orgView/000000031452 | - |
| dc.subject.keyword | CO2 | - |
| dc.subject.keyword | Copolymerization | - |
| dc.subject.keyword | Multiple ammonium salts | - |
| dc.subject.keyword | Salen | - |
| dc.description.alternativeAbstract | A (Salen)Co(III) complex tethering four quaternary ammonium salts with covalent bonds is one of the most highly active catalysts for CO2/epoxide copolymerization. In this work, we aimed to prepare similar (Salen)Co(III) complexes to which quaternary ammonium salts are linked via ionic interactions. Thus, multiple ammonium salts containing 2-5 quaternary ammonium salt units and (Salen)Co(III) complexes containing one or two SO3[PhNH3]+ moieties were prepared. A binary catalytic system composed of the prepared multiple ammonium salts and the prepared (Salen)Co(III) complex containing -SO3-[(nBu)4N]+ moieties showed high activity (TOF, 15004500 h1) for CO2/propylene oxide (PO) copolymerization, whereas a combination of the multiple ammonium salts and the conventional (Salen)Co(III) complex not containing -SO3-[(nBu)4N]+ moieties was inactive under the identical polymerization conditions of [PO]/[Co] = 20000. However, a substantial amount of cyclic carbonate was concomitantly generated, especially when a (Salen)Co(III) complex containing two -SO3-[(nBu)4N]+ moieties was used (2530%). This side-reaction could be mitigated by ca. 50% by employing a (Salen)Co(III) complex containing one -SO3-[(nBu)4N]+ moiety. Cyclic carbonate generation can reasonably be ascribed to ammonium salts ([(nBu)4N]+[carbonate]-) not linked to the (Salen)Co(III) complex formed in the binary catalytic system. | - |
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- Graduate School of Ajou University > Department of Molecular Science and Technology > 3. Theses(Master)
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