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중합촉매: 한 분자내 두 금속 또는 두 성분을 포함하는 뒷 전이금속 촉매
| DC Field | Value | Language |
|---|---|---|
| dc.contributor.advisor | 이분열 | - |
| dc.contributor.author | Sujith S | - |
| dc.date.accessioned | 2018-11-08T07:49:31Z | - |
| dc.date.available | 2018-11-08T07:49:31Z | - |
| dc.date.issued | 2008-08 | - |
| dc.identifier.other | 9349 | - |
| dc.identifier.uri | https://dspace.ajou.ac.kr/handle/2018.oak/7472 | - |
| dc.description | 학위논문(박사)--아주대학교 일반대학원 :분자과학기술학과,2008. 8 | - |
| dc.description.tableofcontents | CHAPTER 1. Introduction = 1 CHAPTER 2. Highly Active and Recyclable Catalytic System For CO2/(Propylene Oxide) Copolymerization = 18 2.1 Introduction = 19 2.2 Results and discussion = 23 2.2.1 Syntheses and Characterization = 23 2.2.2 Polymerization Studies = 26 2.2.3 Catalyst recovery Strategy = 29 2.3 Conclusion = 35 2.4 Experimental Section = 36 2.5 References = 63 2.6 Figures (NMR Spectra) = 66 CHAPTER 3. Ethylene/Polar Norbornene Copolymerization by Bimetallic Salicylaldimine-Nickel Catalysts = 92 3.1 Introduction = 93 3.2 Results and discussion = 94 3.2.1 Syntheses and Characterization = 94 3.2.2 Polymerization Studies = 97 3.2.3 Theoretical Calculations = 103 3.3 Conclusion = 104 3.4 Experimental Section = 105 3.5 References = 113 3.6 Figures (NMR Spectra) = 117 CHAPTER 4. Synthesis, Characterization and Norborne polymerization of ?3-benzylnickel(II) complexes of N-heterocyclic carbene = 128 4.1 Introduction = 129 4.2 Results and discussion = 129 4.2.1 Syntheses and Characterization = 129 4.2.2 X-ray Crystallographic Studies = 131 4.2.3 Polymerization Studies = 134 4.3 Conclusion = 137 4.4 Experimental Section = 137 4.5 References = 144 APPENDIX = 148 1. Preparation andCharacterization of Half-Sandwich Cobalt(III) Complexes of Cp Ligand with a Rigid Thioanisole Side-Chain = 149 2. InAsxSb1-x Alloy Nanocryatals for Use in the Near Infrared = 164 3. Two Components in a Molecule: Highly Efficient and Thermally Robust Catalytic System for CO2/Epoxide Copolymeization = 173 ABBREVIATION = 181 LIST of PUBLICATIONS = 183 | - |
| dc.language.iso | eng | - |
| dc.publisher | The Graduate School, Ajou University | - |
| dc.rights | 아주대학교 논문은 저작권에 의해 보호받습니다. | - |
| dc.title | 중합촉매: 한 분자내 두 금속 또는 두 성분을 포함하는 뒷 전이금속 촉매 | - |
| dc.title.alternative | SUJITH S. | - |
| dc.type | Thesis | - |
| dc.contributor.affiliation | 아주대학교 일반대학원 | - |
| dc.contributor.alternativeName | SUJITH S. | - |
| dc.contributor.department | 일반대학원 분자과학기술학과 | - |
| dc.date.awarded | 2008. 8 | - |
| dc.description.degree | Master | - |
| dc.identifier.localId | 567366 | - |
| dc.identifier.url | http://dcoll.ajou.ac.kr:9080/dcollection/jsp/common/DcLoOrgPer.jsp?sItemId=000000009349 | - |
| dc.subject.keyword | 중합촉매 | - |
| dc.subject.keyword | 분자 | - |
| dc.subject.keyword | 금속 | - |
| dc.subject.keyword | 전이금속 | - |
| dc.subject.keyword | 촉매 | - |
| dc.description.alternativeAbstract | 1. A highly active catalytic system for CO2/(propylene oxide) copolymerization was prepared based on the concept of a stystem containing a Lewis acidic metal center and quarternary ammonium salts units. The catalytic system showed high activity (TON >20000; TOF >20000 h-1) even at high temperature and high [epoxide]/[catalyst] ratio and selectively producing a very high molecular-weight copolymer (Mn, 300,000). The catalyst can be easily separated by filtration through a short pad of silica gel to obtain polymer containing negligible amounts of metal residue (1-2 ppm). The separated catalyst can be reused without significant loss in catalytic performance. 2. Bimetallic salicylaldimine-nickel complexes, bridge{[(2,6_(-i)Pr₂C_(6)H₂)-N=CH-(2- anthracenyl- C_(6)H₃-O)-κ²-N,O]Ni(η³-CH₂Ph)}₂ (bridge = ortho-C_(6)H₄, CH₂, ortho- C_(6)H₄(C_(6)H₄)₂,), are prepared. The bimetallic complexes show higher activities and higher polar monomer incorporations in the ethylene/2-(methoxycarbonyl)norbornene and ethylene/2-(acetoxymethyl)norbornene copolymerizations than the mononuclear complex, [(2,6-iPr₂C_(6)H₃)-N=CH-(2-anthracenyl-C_(6)H₃-O)- κ²-N,O]- Ni(η³-CH₂Ph). 3. Neutral η¹-benzylnickel carbene complexes, [Ni(η¹-CH₂C_(6)H_(5))(IiPr)(PMe3)(Cl)] (3) (IiPr = 1,3-bis-(2, 6-diisopropylphenyl)imidazol-2-ylidene) and [Ni(η¹- CH₂C_(6)H_(5))(SIiPr)(PMe3)(Cl)] (4) (SIiPr = 1,3-bis-(2, 6-diisopropylphenyl)imidazolin-2- ylidene), were prepared by the reaction between [Ni(η³- CH₂C_(6)H_(5))(PMe3)(Cl)] and an equivalent amount of the corresponding free N-heterocyclic carbene. The preparation of η³- benzylnickel carbene complexes, [Ni(η³-CH₂C_(6)H_(5))(IiPr)(Cl)] (5) and [Ni(η³- CH₂C_(6)H_(5))(SIiPr)(Cl)] (6) were carried out by the abstraction of PMe3 from 3 and 4 by the treatment of B(C_(6)F_(5))₃. The treatment of AgX on 5 and 6 produced the anion-exchanged complexes, [Ni(η³-CH₂C_(6)H_(5))(NHC)(X)] (7, NHC = IiPr, X = O₂CCF₃; 8, NHC = IiPr, X = O3SCF3; 9, NHC = SIiPr, X = O₂CCF₃; 10, NHC = SIiPr, X = O₃SCF₃). The solid state structures of 3 and 10 were determined by X-ray crystallography. The η³-benzyl complexes of IiPr (5, 7, and 8) alone, in the absence of any activators such as borate and MAO, showed good catalytic activity towards the vinyl-type norbornene polymerization. The catalyst was thermally robust and the activity increases as the temperature rises to 130 °C. | - |
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