Magnetic Shielding of 19F in XeF2
Magnetic Shielding of 19F in XeF2
复制标题
XeF2 中 19F 的磁屏蔽
DOI：
10.1063/1.1671178
复制
发表时间：
1969
影响因子：
4.4
通讯作者：
W. E. Falconer
中科院分区：
文献类型：
--
作者：
D. Hindermann;W. E. Falconer
测量了XeF2的19F核磁共振刚体晶格第二矩与外加磁场的关系。实验屏蔽各向异性| Δσ | = 105±10 × 10−6与先前使用局域轨道模型计算的σ⊥−σ‖= - 506 × 10−6的值不完全一致。与场无关的刚性晶格第二矩比晶体学数据计算出的矩大0.4 G2，这可能是因为XeF2中的振幅较大。第二矩和自旋-晶格弛豫时间的温度依赖性也被报道。
The rigid‐lattice second moment of the 19F nuclear magnetic resonance of XeF2 has been measured as a function of the external magnetic field. The experimental shielding anisotropy | Δσ | = 105 ± 10 × 10−6 does not agree closely with a value of σ⊥ − σ‖ = − 506 × 10−6 previously calculated using a localized orbital model. The field‐independent rigid‐lattice second moment is ∼ 0.4 G2 larger than that calculated from crystallographic data, probably because of large amplitude vibrations in XeF2. The temperature dependences of the second moment and of the spin–lattice relaxation time are also reported.