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

제121회 대한화학회 학술발표회, 총회 및 기기전시회 안내 A Chemical Function of Commonly Inert Trichloromethane: Room-Temperature Removal of Coordinated Solvents at Open Metal Sites in MOFs

2018년 2월 12일 16시 35분 52초
INOR.P-194 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
Jinhee Bae, Nak Cheon Jeong*
Department of Emerging Materials Science, Daegu Gyeongbuk Institute of Science & Technology, Korea
Open coordination sites (OCSs) in metal-organic frameworks (MOFs) have shown potential in applications such as molecular separation and sorption, catalysis, ionic and electronic conductions, and chemical sensing, among others. Thus, the removal of coordinated solvents at OCSs has been thought as an important prerequisite step that must be performed prior to use of MOFs in such applications. Thermal activation (TA) method that is normally performed by applying high temperature and vacuum has been commonly employed to remove the coordinated solvents from the MOFs. However, considering that the TA influences negatively on the structural integrity of MOF, a safe method for the activation has been demanded. In this poster presentation, we introduce a new and safe activation method, that is, ‘chemical activation’ that is performed by trichloromethane (TCM). More concretely, soaking MOFs into fresh TCM solvent several times can completely remove the coordinated solvent from the MOFs and thereby, fully activate the MOFs. We ascribe the activation function behaviour of TCM to its possible coordination to metal center. We observed that although TCM is an inert chemical so that employed as a solvent in the variety of chemical reactions, the lone-paired electrons at the Cl atoms in TCM could coordinate to the OCSs at Cu centers. In particular, we will discuss a possible coordination of TCM and a plausible mechanism for the chemical activation function of TCM treatment process on the basis of the results obtained from Raman spectroscopic analysis. Finally, we also demonstrate that this chemical activation method is a superior strategy for activating thermally deformable MOF-polymer mixed matrices (MMs).