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제112회 대한화학회 학술발표회, 총회 및 기기전시회 안내 A study on the MCM41 confinement effect on the structure and dynamics of lithium borohydride by using solid-state NMR

2013년 8월 29일 16시 59분 00초
PHYS.P-406 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
10월 16일 (수요일) 16:00~19:00
저자 및
최형근, Magnus To1, Hwang. Sonjong2,*, 김철*
한남대학교 화학과, Korea
1caltech, United States
2caltech, Korea
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승인 2건
The structural and dynamical properties of lithium borohydride confined in on ordered porous silica (MCM41) were studied by using 1H, 7Li, and 11B solid-state NMR. The physicochemical properties of metal hydrides modified at the nano scale. The lithium borohydride, a material with high hydrogen content, could be readily incorporated into porous silica (MCM41) by using a simple chemical impregnation technique (solvent infiltration). This method has the advantage that impregnation can be performed under milder conditions as compared to the melt infiltration scheme. We were able to confirm infiltration effect with the solid-state MAS NMR experiments. Observed starting at 323 K, a four-line pattern superimposed on the broad line became visible. This pattern can be assigned to mobile borohydride species which means that the mobility of the borohydride increased by the confinement at LiBH4. As drying time increased, the line split was more evident even at low temperature, which means penetration efficacy increased. We concluded that nano scale confinement of lithium borohydride in the porous silica strongly enhanced the mobility of borohydride anion and lithium cation.