From Ultraslow to Extremely Fast Dynamics in Sodium Nitrate: an 17O NMR Study

From Ultraslow to Extremely Fast Dynamics in Sodium Nitrate: an 17O NMR Study
复制标题

硝酸钠从超慢到极快的动力学:17O NMR 研究

DOI:
10.1007/s00723-020-01201-5
复制
发表时间:
2020
影响因子:
1
通讯作者:
R. Böhmer
R. Böhmer
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
J. Beerwerth;R. Siegel;L. Hoffmann;L. S. Plaga;M. Storek;B. Bojer;J. Senker;W. Hiller;R. Böhmer

文献摘要

参考文献

被引文献

相似文献

增加动力学在固体中具有核进行二阶四极相互作用导致中央过渡光谱,经历两个连续的线形过渡。当分子交换速率在主导相互作用的强度的量级上时,发生常规的运动窄化。在第二步中,当运动变得比拉莫尔进动速率更快时,所得到的中间变窄的光谱进一步改变,导致可以显示残余四极位移的末端变窄的光谱。我们推导出这种位移的解析表达式,并分析了CN对称锥模型的四极中心跃迁谱。当N ≥ 3时,末端窄化谱保持不变,而中间窄化谱仅在N ≥ 5时保持不变。这一发现涉及到不同的(立方与二十面体)对称性,所需的平均出空间的第二和第四阶项的二阶四极相互作用。根据最近的工作(Hung等人,Solid State Nucl Magn Reson 84:14-19,2017),应用17 O NMR来检查NaNO 3中硝酸根基团的三位旋转。线形测量和分析,除了以前的工作,卫星过渡和受激回波实验进行。从后者提取的最终状态振幅再现使用模型计算。它示出了如何二维交换光谱有关的N-网站锥运动可以被分解的有效两个网站的跳跃光谱。后一种方法成功地测试了NaNO 3。
Increasing dynamics in solids featuring nuclei subjected to second-order quadrupolar interactions lead to central-transition spectra that undergo two consecutive line-shaped transitions. Conventional motional narrowing occurs when the molecular exchange rate is on the order of the strength of the dominant interaction. In a second step, the resulting intermediately narrowed spectra change further when the motion becomes faster than the Larmor precession rate, leading to terminally narrowed spectra that can display a residual quadrupolar shift. We derive analytic expressions for this shift and analyze the quadrupolar central-transition spectra in terms of CNsymmetrical cone models. Increasing the number of sites toN≥ 3, the terminally narrowed spectra remain unaltered, while the intermediately narrowed spectra remain unaltered only forN≥ 5. This finding relates to the different (cubic vs. icosahedral) symmetries that are required to average out the spatial second- and fourth-rank terms in the second-order quadrupolar interaction. Following recent work (Hung et al., Solid State Nucl Magn Reson 84:14–19, 2017),17O NMR is applied to examine the three-site rotation of the nitrate group in NaNO3. Line shapes are measured and analyzed, and in addition to prior work, satellite-transition and stimulated-echo experiments are carried out. The final-state amplitudes extracted from the latter are reproduced using model calculations. It is shown how two-dimensional exchange spectra relating toN-site cone motions can be decomposed in terms of effective two-site-jump spectra. This latter approach is successfully tested for NaNO3.
DOI: 10.1021/jz501729d
发表时间: 2014-09
期刊: The journal of physical chemistry letters
影响因子: --
作者:
W. Wang;Bryan E. G. Lucier;V. Terskikh;W. Wang;Yining Huang
通讯作者: W. Wang;Bryan E. G. Lucier;V. Terskikh;W. Wang;Yining Huang
低温正磷酸钠中的阴离子旋转和阳离子扩散:固态 NMR 结果
DOI: --
发表时间: 2001
期刊:
影响因子: --
作者:
M. Witschas;H. Eckert;H.;A. Putnis;G. Korus;M. Jansen
通讯作者: M. Jansen
粉末中四极核的卫星跃迁高分辨率核磁共振
DOI: --
发表时间: 1985
期刊:
影响因子: --
作者:
A. Samoson
通讯作者: A. Samoson
半整数四极自旋的 MQMAS 序列中的相位循环。
DOI: 10.1016/j.pnmrs.2010.05.003
发表时间: 2010
影响因子: 6.1
作者:
R. Hajjar;Y. Millot;P. Man
通讯作者: P. Man
DOI: 10.1063/1.4936416
发表时间: 2015-12
期刊: The Journal of chemical physics
影响因子: --
作者:
M. Adjei-Acheamfour;J. F. Tilly;Joachim Beerwerth;R. Böhmer
通讯作者: M. Adjei-Acheamfour;J. F. Tilly;Joachim Beerwerth;R. Böhmer