Solid-State High-Resolution ¹H-NMR Study for Ammonia Borane of Hydrogen Storage Material

한덕영; 한준희; 이철의; 김세훈; 김창삼

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자료유형: 학술저널

저자정보: 한덕영 한준희 이철의 김세훈 김창삼

저널정보: 한국자기공명학회 Journal of the Korean Magnetic Resonance Society Journal of the Korean Magnetic Resonance Society 제14권 제1호

발행연도: 2010.1

수록면: 38 - 44 (7page)

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In liquids NMR, 1H is the most widely observed nucleus, which is not the case in solids NMR. The reason is due to the strong homo-dipolar interactions between the hydrogen atoms which mask the useful chemical shift information. Therefore we must remove the strong homo-dipolar interactions in order to get structural information, which can be investigated by the isotropic chemical shift. There are two ways of obtaining it. One is the ultra-fast MAS of ca. 70 kHz spinning speed, which has become available only recently. The other way is devising a pulse sequence which can remove the strong homo-dipolar interaction. In the latter way, MAS with a moderate spinning rate of a few kHz, is enough to remove the chemical shift anisotropy. In this report, 1D-CRAMPS and 2D MAS-FSLG techniques are utilized and their results will be compared. This kind of high-resolution 1H NMR for solids, should become a valuable analytical tool in the understanding and the developing of a new class of hydrogen storage materials. Here ammonium borane -NH3BH3, whose hydrogen content is high, is used as a sample.

#NH3BH3 #Hydrogen storage material #Proton-NMR #High-resolution NMR

참고문헌 (11)

참고문헌 신청

/ / DOE Office of Energy Efficiency and Renewable Energy, Hydrogen, Fuel Cells & Infrastructure Technologies Program Multi-Year Research, Development and Demonstration Plan

/ / Private communications

D. P. Burum / 1979 / / J. Chem. Phys. 71 : 944 ~

J.W. Wiench / 2007 / / 49th Rocky Mountain Conference on Analytical Chemistry

M.E. Bluhm / 2006 / / J. Am. Chem. Soc. 128 : 7748 ~ 7749

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