No abstract

A number of novel luminescent di-, tri-, and tetranuclear copper complexes have been synthesized in good yields using a modular ligand system based on triazole-phosphines. This kind of ligand is easily accessible through an improved one-pot synthesis that permits the facile introduction of various alkyl or aromatic substituents at the 1-, 4-, or 5-position of the triazole ring. X-ray crystallography revealed three different types of complexes: neutral di- and tetranuclear structures with C i symmetry, and a charged trinuclear structure posessing C 3 symmetry. A spectroscopic evaluation showed promising photoluminescence properties in terms of their potential use in organic light-emitting devices, with maxima in the range of 500–550 nm, depending on the substitution pattern of the triazole ligand used for the complexation. Experimental observations were complemented by density functional theory calculations of ground and excited states.

No abstract

A new staining reagent was prepared and its ability to stain several azide-containing agents on TLC plates was determined.

The Mitsunobu reaction has been used as an efficient tool for the synthesis of orthogonallyprotected and unprotected depsipeptides such as Boc/Fmoc-l-Lys(Alloc)-d-Ala-d-Lac-OAllyl or l-Lysd-Ala-d-Lac that are bacterial cell wall precursor analogues found in vancomycin-resistant enterococci.