Angewandte Chemie International Edition

Cover image for Vol. 56 Issue 40

Editor: Peter Gölitz, Deputy Editors: Neville Compton, Haymo Ross

Online ISSN: 1521-3773

Associated Title(s): Angewandte Chemie, Chemistry - A European Journal, Chemistry – An Asian Journal, ChemistryOpen, ChemPhotoChem, ChemPlusChem, Zeitschrift für Chemie

Cover Picture (Angew. Chem. Int. Ed. Engl. 3/1991)

30_03/1991The cover picture shows how aesthetically appealing the results of modern analytical methods can be. The method is pulsed ESR spectroscopy, which now, long after NMR spectroscopy was revolutionized by pulsed methods, could also lead to a notable improvement in the experimental possibilities of ESR spectroscopy. The result shown in the cover picture is the response signal which was obtained after stochastic excitation of a cobalt complex containing N,O-ligands. The modulation pattern observed after adding together data from many individual measurements is caused by interaction between the spin of the unpaired electron and the spins of 14N nuclei. From the frequencies of these oscillations, hyperfine and nuclear quadrupole couplings of the 14N nuclei may be derived. More about the present state-of-the-art of pulsed ESR spectroscopy is reported by A. Schweiger on p. 265.

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