Arndt Knöchel

TL;DR: In this article, various application possibilities of microscopic x-ray fluorescence and associated methods for the characterization and provenance analysis of objects and materials of cultural heritage value are discussed by means of a number of case studies.

TL;DR: A macrocyclic aminopolyether (Kryptofix®2.2.c.2.) supported labelling method for the preparation of n.a. [17-18F]- fluoroheptadecanoic acid is described, which allows a direct isolation of the product from the reaction mixture by means of reverse phase HPLC.

TL;DR: In this paper, a novel capillary optics technique for focusing synchrotron X-ray beams has been applied in an experiment performed at the DORIS storage ring at HASYLAB.

TL;DR: Based on symmetry breaking steps under one-pot conditions, simple molybdenum oxide-based building blocks initially assemble to 'giant molecular wheels' in a fast process followed by further slower assembly processes leading stepwise to more complex mesoscopic architectures including spherical ones and finally to those with a size larger than 500 nm.

TL;DR: In this article, the nucleophilic introduction of n.c.a.fluoride into alkanes and carboxylic acids using anion activation by macrocyclic polyethers was investigated.