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

제121회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Synthesis of Cobalt(Ⅲ) Complex Containing Tetradentate [ONNO] Type Ligand Derived from Pyridoxal and Its Catalytic Study in Cycloaddition Reaction of CO2

2018년 2월 2일 14시 29분 15초
INOR.P-44 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
Sam Hwang, Ji Yeon Ryu, Junseong Lee*
Department of Chemistry, Chonnam National University, Korea

Due to the use of coal fuel, CO2 has been steadily increased in nature. Global warming due to the accumulation of carbon dioxide has led our attention to conversion CO2 to industrial materials. One of the efficient methods is synthesis of cyclic- or poly- carbonate through ring opening reaction of propylene oxide with homogeneous catalyst. Co complexes containing SALEN(N,N’-bis(salicylidene)ethylenediamine) ligand have been reported effective catalyst in the reaction. A recent research trend is to use only catalyst without co-catalyst such as DMAP{4-dimethylamonopyridine} and tetraalkylamoniumiodide in the ring opening reaction. Following this trend we have focused on ligands with cationic moieties that can replace co-catalysts. In this study, the new cobalt complex containing SALEN ligand with pyridine was synthesized for developing new Co(Ⅲ) system used in transformation of carbon dioxide. A new cobalt(Ⅲ) complex of pyridoxyl SALEN ligand was synthesized by the reaction of pyr2en ligands (pyr2en =(N,N ‘-bis(pyridoxylideneiminato)ethylene) ) with Co(OAc)2. The complex was characterized by various spectroscopic methods such as infrared spectroscopy, high resolution mass analysis, and single crystal X-ray crystallography. The tetradentate Schiff base ligand binds cobalt metal in a plane and forms an octahedral geometry by coordinating acetate and DMSO. The synthesized cobalt complex was used in the cycloaddition reaction of CO2 to propylene oxide and the detailed study will be presented.