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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

대한화학회 제121회 학술발표회 및 총회 Intermediate studies of aluminum and iron complex in CO2 activation with epoxide

등록일
2018년 2월 6일 20시 03분 04초
접수번호
4428
발표코드
INOR.P-101 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
4월 19일 (목요일) 11:00~12:30
발표형식
포스터
발표분야
Inorganic Chemistry
저자 및
공동저자
Sanha Park, Yunho Lee*
Department of Chemistry, Korea Advanced Institute of Science and Technology, Korea

Carbon dioxide conversion into valuable chemicals has received much attention since it has potential applications as an abundant, nontoxic and renewable C1 source. The most widely studied area in the activation of CO2 is its coupling reaction with various epoxides to produce industrially important commodity chemicals such as, polycarbonate and cyclic carbonate. Herein, we are trying to understand aluminum and iron complexes in parallel, by comparing the difference in selectivity of the iron and aluminum catalyst based on an imino-tris(phenolate) ligand. While generating polycarbonate and cyclic carbonate in the catalytic cycle, a metal oxide complex is possible, in which the metal center is coordinated to an oxygen atom of ring-opened epoxide. A following metal carbonate intermediate is generated by insertion of CO2. To investigate the intermediates, we are striving to directly synthesize metal oxide and carbonate complexes with aluminum and iron. An aluminum complex, {(NO3)Al}2, was synthesized and has been well characterized by various spectroscopic techniques and X-ray crystallography. Sodium isopropoxide, which possesses an analogous structure of ring-opened propylene oxide, was added to {(NO3)Al}2 to synthesize {(NO3)Al(OiPr)}Na, the expected intermediate-like aluminum isopropoxide. Following insertion of CO2 possibly generates the carbonate intermediate, {(NO3)Al(OC(=O)OiPr)}Na. An iron complex, {(NO3)Fe(THF)}2, was synthesized and well characterized by various spectroscopic techniques and X-ray crystallography. In a similar way, two kinds of the iron complex intermediate could possibly be prepared: {(NO3)Fe(OiPr)}Na and {(NO3)Fe(OC(=O)OiPr)}Na. By comparing the aluminum and iron complexes in a parallel way, we expect to better understand the intermediates of the aluminum and iron complexes and might suggest a plausible reason for the selective behavior.

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