Cover Picture: Ln3Q9as a Molecular Framework for Ion-Size-Driven Assembly of Heterolanthanide (Nd, Er, Yb) Multiple Near-Infrared Emitters (Chem. Eur. J. 10/2015)

Abstract

The Three Graces of Canova illustrates an assembly of three entities, each carrier of its own virtue, which become one in the embrace to the central figure, governing the unit composition. Similarly, the Ln3Q9 molecular framework assembles three different NIR-luminescent lanthanide ions, in which the central position seems to be carved out for the neodymium ion, linking all of them together by quinolinolato bridges. The multiple composition of this unit allows the individual lanthanide emissions to become combined. For more details see the Communication by F. Artizzu, P. Deplano et al. on page 3882 ff. The Three Graces of Canova illustrates an assembly of three entities, each carrier of its own virtue, which become one in the embrace to the central figure, governing the unit composition. Similarly, the Ln3Q9 molecular framework assembles three different NIR-luminescent lanthanide ions, in which the central position seems to be carved out for the neodymium ion, linking all of them together by quinolinolato bridges. The multiple composition of this unit allows the individual lanthanide emissions to become combined. For more details see the Communication by F. Artizzu, P. Deplano et al. on page 3882 ff. Nanorattles or Yolk–Shell Nanoparticles Rapid progress in nanotechnology within the last several decades has favored the creation of nanostructures with increasing levels of complexity. Of these nanostructures, nanorattles remain a niche area to be further explored. In their Review on page 3854 ff., M. Priebe and K. Fromm look at the choice of building blocks and show that the various preparation methods frequently used for solid nanoparticles (NPs) can also be applied to fabricate nanorattles. The advantages of nanorattles over traditional NPs result from the presence of the void, which allows movement of the encapsulated core as well as its protection, factors that subsequently contribute to the potential applications of nanorattles in a variety of areas such as catalysis, Li-ion batteries, and drug delivery.1 Kinetic Resolution One of the specific features of ketenes, their enhanced reactivity towards Z-alkenes over E-alkenes in [2+2] cycloaddition processes, is illustrated through the kinetic resolution of Z/E mixtures of olefins. From a stereoisomeric mixture of olefins, either pure E isomers can be isolated by the selective reaction of the Z isomer with the ketene, while cis-cyclobutanones are selectively formed. This difference of reactivity has been explored using DFT calculations, unveiling the origin for this peculiar feature of ketenes. For more details see the Communication by J.-F. Poisson et al. on page 3876 ff.1 Novel Peptide Chemistry Unusual peptides revealing a novel class of natural products were found in the luminescent earthworms Fridericia heliota from Siberian taiga. The structures of these peptides give clues for understanding biosynthetic pathway for a recently described Fridericia luciferin. For more information see the Full Paper by I. V. Yampolsky et al. on page 3942 ff.1