Proton CRAMPS of NH3+ groups: line broadening and molecular dynamics
Proton CRAMPS of NH3+ groups: line broadening and molecular dynamics
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NH3 基团的质子痉挛：谱线展宽和分子动力学
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
R. Harris
中科院分区：
文献类型：
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作者：
P. Jackson;R. Harris
通过变温实验研究了固态 NH3+ 基团内质子的 1H 组合旋转和多脉冲光谱 (CRAMPS) 线宽的增加。线宽随温度的变化可以与特定的分子动力学过程相关。对于 L-[15N]-丙氨酸，随着温度降低，NH3+ 和 CH3 基团重新取向都会引起各自 CRAMPS 信号的特定加宽。在确定 NH3+ 质子线形时，这种动态过程可能比 14N-1H 四极修改偶极展宽更重要。
Increased 1H combined rotation and multiple pulse spectroscopy (CRAMPS) linewidths for protons within NH3+ groups in the solid state have been investigated by variable-temperature experiments. Linewidth variation with temperature can be correlated with specific molecular dynamic processes. With L-[15N]-alanine, both the NH3+ and CH3 group reorientations give rise to specific broadening of the respective CRAMPS signals as the temperature is lowered. Such dynamic processes may be more important than 14N-1H quadrupolar-modified dipolar broadening in determining NH3+ proton lineshapes.