Angewandte Chemie International Edition

Cover image for Vol. 56 Issue 50

Editor: Neville Compton; Editor Emeritus: Peter Gölitz

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: Pyrromethene Dialkynyl Borane Complexes for “Cascatelle” Energy Transfer and Protein Labeling (Angew. Chem. Int. Ed. 24/2005)

44_24/2005An energy-cascade device is created by linking ethynylpyrene fragments to boron centers. The cover picture shows such a Bodipyrene dye in which irradiation of the pyrene moiety gives a virtual Stokes shift of 10 000 cm−1. The background shows a 3D plot of a fluorescence well containing femtomolar amounts of labeled biomaterial. In their Communication on page 3694 ff., G. Ulrich, R. Ziessel, and co-workers describe how biomolecules can be labeled with these dyes, which are very promising for fluorescence imaging.

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Also of Interest

Hypervalent Iodine Compoundsfor001

In his Minireview on page 3656 ff., T. Wirth describes recent advances and trends in hypervalent iodine chemistry. The stability and versatility of these compounds has opened the route to new applications in organic synthesis.

Enzyme Mechanismsfor002

Lyases catalyze the removal of the nonacidic β protons of histidine and phenylalanine with the release of ammonia. In their Review on page 3668 ff., J. Rétey and L. Poppe summarize the latest findings that have led to revision of the long-accepted reaction mechanism.

Oxoiron(iv) Complexesfor003

Structural insight obtained through a combination of X-ray crystallography, NMR spectroscopy, and DFT calculations of novel oxoiron(iv) complexes with pentadentate aza ligands is discussed by L. Que, Jr., C. J. Cramer, and co-workers in their Communication on page 3690 ff.