Front Cover: On the Use of Solomon Echoes in 27Al NMR Studies of Complex Aluminium Hydrides (ChemistryOpen 1/2024)

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.