Determination of chemical shift of gas-phase hydrogen molecules by ~1H nuclear magnetic resonance

Fujiwara H.; Yamabe J.; Nishimura S.

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Determination of chemical shift of gas-phase hydrogen molecules by ~1H nuclear magnetic resonance

机译：〜1H核磁共振法测定气相氢分子的化学位移

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The precise and detailed chemical shift of gas-phase hydrogen molecules was successfully determined by ~1H nuclear magnetic resonance (NMR), avoiding the intervention of neighboring molecules such as in hydrogen occluding materials (free hydrogen). The measurement was conducted with double walled NMR sample tube taking into consideration the change of hydrogen pressure. The inner tube was filled with standard substance (DHO in D_2O at 4.8 ppm). The chemical shift of free hydrogen molecules was determined to be 7.40 ± 0.01 ppm at 0.18 MPa, 25 °C, which is different from previously reported chemical shifts of hydrogen gas with intervention of neighboring molecules.

机译：气相氢分子的精确和详细的化学位移已通过〜1H核磁共振（NMR）成功确定，避免了诸如吸氢的材料（游离氢）等邻近分子的干预。考虑到氢气压力的变化，用双壁NMR样品管进行测量。内管充满标准物质（D_2O中的DHO，浓度为4.8 ppm）。游离氢分子的化学位移在25°C和0.18 MPa下测定为7.40±0.01 ppm，这与先前报道的氢气在相邻分子的干预下的化学位移不同。

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《Chemical Physics Letters》 |2010年第3期|共3页
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Fujiwara H.; Yamabe J.; Nishimura S.;
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Determination of chemical shift of gas-phase hydrogen molecules by ~1H nuclear magnetic resonance

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