The Front Cover shows the static solid-state ²⁷Al NMR spectrum of KAlH₄ in front of the crystal structure of this material. The spectrum exhibits the typical first-order quadrupole broadening of the satellite transitions that is caused by the interaction of the quadrupole moment of the aluminium nuclei with the electric field gradient. Therefore, the aluminium nuclei act as probe for the charge distribution, and hence for the local geometry. Complementary information can be obtained from density functional theory (DFT) calculations, as highlighted by the DFT electron density map in the lower part of the image. The authors are grateful to Dr. Frank Hoffmann (Hamburg) for preparing the cover image. More information can be found in the Research Article by Bodo Zibrowius et al.

中文翻译：

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封面：关于所罗门回波在复杂氢化铝的 27Al NMR 研究中的应用（ChemistryOpen 1/2024）

封面在该材料的晶体结构前面显示了KAlH ₄的静态固态^{27 Al NMR 谱。}光谱表现出典型的卫星跃迁的一阶四极展宽，这是由铝核的四极矩与电场梯度的相互作用引起的。因此，铝核充当电荷分布的探针，从而成为局部几何形状的探针。补充信息可以从密度泛函理论 (DFT) 计算中获得，如图像下部的 DFT 电子密度图突出显示的那样。作者感谢 Frank Hoffmann 博士（汉堡）准备封面图片。更多信息请参阅 Bodo Zibrowius 等人的研究文章。