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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능
대회명 대한화학회 제121회 학술발표회 및 총회
등록일 2018년 2월 2일 14시 29분 12초
접수번호 3551
발표코드 INOR.P-46 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간 4월 19일 (목요일) 11:00~12:30
발표형식 포스터
발표분야 Inorganic Chemistry
저자 및 공동저자 Youngmin Byun, Eun Hye Wi, Junseong Lee*
Department of Chemistry, Chonnam National University, Korea
제목 Novel Titanium Complexes bearing Chiral Tridentate Ligand for Cyclic Cycloaddition of CO2 to Epoxide
내용

Since 1960s, CO2 utilization had led to a great deal of attention which from environmental protection and carbon economy. CO2 utilization with epoxide is one of the efficient ways to produce high value-added material such as polycarbonates (PCs) and cyclic carbonates (CCs). Although lots of complexes have already developed successful catalytic systems to produce polycarbonate (PCs) from the copolymerization of CO2 and epoxide, catalytic system of cyclic carbonate (CCs) is not well developed yet and searching for the efficient catalysts is still remained as an important research area. A series of new titanium complexes, TiLCl2(THF)(1) and TiL2(2), containing tridentate chiral [ONO] type Schiff-base ligand, L, easily prepared from the condensation reaction of 2,4-pentadione and (1R,2S)-(–)-1-aminoindanol were synthesized and characterized by various analytical methods including X-ray crystallography. Ligand L acted as a dianionic tridentate ligand and, owing a chiral center in the aminoindanol part, imparted chirality to its titanium complexes. The newly synthesized titanium complexes(1, 2) and previously reported analogues Ti complexes(3-5) were used as catalysts in the cycloaddition of CO2 to propylene oxide as the first representatives of titanium complexes with tridentate schiff-base ligand to have been used for this purpose. These complexes provided high selectivity toward cyclic propylene carbonate (>99%) and showed considerable activities with TOF values up to 131 h-1 in comparison with the previously reported catalyst systems.

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