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코발트-살렌계 이산화탄소/에폭사이드 공중합 촉매 개발
- Author(s)
- 노은경
- Advisor
- 이분열
- Department
- 일반대학원 분자과학기술학과
- Publisher
- The Graduate School, Ajou University
- Publication Year
- 2008-02
- Language
- eng
- Keyword
- CO2 epoxide copolymerization; 코발트-살렌계
- Alternative Abstract
- Salicylaldehyde compound containing an ammonium salt unit, [2-(HO)-3-tBu-5-{Bu₃N+(CH₂)₃Si(Me₂)}C_(6)H₂C(=O)H][BF4-] is prepared from which a Salen-type ligand and its cobalt(III) complex, (Salen-1)CoX (1: Salen-1 = [trans-N,N'-bis(3-tBu-5-(Bu3N+(CH₂)₃Si(Me₂)-salicylidene)-1,2-cyclohexanediamine)] X=2,4-dinitrophenolate) is prepared. Complex 1 shows high activity for CO₂/(propylene oxide) copolymerization even at a condition of high [propylene oxide]/[catalyst] ratio and high temperature up to 90 ℃, at which conditions a typical binary system of [(Salen)CoX]/[PPNCl] does not yield any copolymer. A very high TOF (up to 3500 h^(-1)) and TON (up to 14,500) are achieved, which have never been attained with other catalytic systems. The high selectivity (>90%) for the formation of copolymer over cyclic carbonate and the high molecular weight of the obtained polymers (Mn = 53,000 - 80,000) are the other merits of the catalyst.1
- Fulltext
- Appears in Collections:
- Graduate School of Ajou University > Department of Molecular Science and Technology > 3. Theses(Master)
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