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  • 09월 01일 18시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제118회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Stepwise Chemical Activation of Open-Metal Sites in Copper-Based Metal-Organic Framework HKUST-1

2016년 8월 31일 23시 01분 30초
INOR.P-251 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 13일 (목요일) 11:00~12:30
저자 및
배진희, 정낙천1,*
DGIST 신물질과학전공, Korea
1DGIST 신물질과학과, Korea
Metal-organic frameworks (MOFs) are an intriguing class of nanoporous materials that can be readily self-assembled by combining metal ions and organic ligands. With the extended nano-porosity and large internal surface area, MOFs have been examined as candidates for applications. In particular, the open coordination site(OCS) on nodal metal ion has shown considerable potential in its role for the applications in i.e., high ion transport and efficient gas sorption. Thus, the activation of MOFsthe removal of pre-coordinated solvent molecules (typically used in during the synthesis) from the OCSshas been thought as a prerequisite step for those applications. The thermal activation (TA), which is normally performed by applying heat and vacuum, has been a unique way to remove the OCS-coordinated solvent molecule, whereas the other four methods are only useful for removing pore-filling solvents. Given that the high temperature can lead to structural damage to MOFs, low-temperature process will be conceivably a promising way for OCS activation, compared to the cumbersome, pricey heat-and-vacuum technique. Recently, we have discovered a new, chemical method to activate the OCS, namely “chemical activation” ( CA). This process is performed just by soaking MOF samples into dichloromethane (DCM) for several minutes at room temperature. Although this CA method is quite useful for low-temperature activation, strongly coordinated solvent such as DMF and DMSO cannot be adaptable to this CA method because they are not readily replaced by DCM whose coordination is very weak. In this poster, we present an advanced CA method, “multistep chemical activation”. With this strategy, we could completely remove the DMF solvent coordinated to the OCS sites in HKUST-1 without structural damage.