다양한 코발트-살렌계 이산화탄소/에폭사이드 촉매의 개발 및 중합
Cobalt(III) Complexes of Various Salen-Type Ligand Bearing Four Quaternary Ammonium Salts and Their Reactivity for CO2/Epoxide Copolymerization
- 주제(키워드) Carbon dioxide , Epoxide , Salen-cobalt complexes , Polymerization
- 발행기관 아주대학교
- 지도교수 이분열
- 발행년도 2010
- 학위수여년월 2010. 2
- 학위명 석사
- 학과 및 전공 일반대학원 분자과학기술학과
- 실제URI http://www.dcollection.net/handler/ajou/000000010701
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
Ligand variation on a cobalt(III) complex of Salen-type ligand comprised of 1,2-cyclohexenediamine and salicylaldehyde bearing a methyl substituent on its 3-position and -[CMe(CH2CH2CH2N+Bu3)2] on its 5-position, which is a highly active catalyst for CO2/propylene oxide copolymerization, was carried out. Replacement of the methyl substituent on 3-position with bulky isopropyl group resulted in alteration of the binding mode, consequently lowering TOF significantly. Replacement with ethyl group preserved not only the binding mode but also the activity. Either replacement of tributylammonium unit with trihexylammonium or trioctylammonium or replacement of 1,2-cyclohexenediamino unit with -NC(Me)2CH2N- decreased the activity even though the binding mode was unaltered.
more목차
1. Introduction -1
2. Result and Discussion -2
2.1 Synthesis and Characterization -2
2.2 polymerization -6
3. Summary -8
4. Experimental Section -8
5. Reference -16
6. Figures (NMR Spentra) -16
