Synthesis and optical properties of (a)chiral terpyridine-ruthenium complexes

Hofmeier, Harald; El-ghayoury, Abdelkrim; Schenning, Albertus P. H. J.; Schubert, Ulrich S.

Abstract:

Chiral terpyridine ligands have been synthesized and characterized. By applying Ru(III)Ru(II) chemistry, symmetrical as well as asymmetrical bis-terpyridine ruthenium(II) complexes were obtained. These materials were fully characterized and their optical properties investigated. While the chiral metal complexes revealed no Cotton effect in good solvents such as chloroform, CD-measurements in dodecane showed an effect in both ligand and MLCT regions, suggesting chirality transfer from the lateral alkyl chains to the complex core. This behavior points to the formation of supramolecular aggregates in dodecane. Furthermore, the analogous achiral ligand and its corresponding ruthenium(II) complexes were prepared. (C) 2004 Elsevier Ltd. All rights reserved.

Year:

2004

Type of Publication:

Article

Keywords:

CD-spectroscopy; ruthenium; supramolecular chemistry; terpyridine complex; assisted-laser-desorption ionization; polymers; ligands; 2; 2'; -6'; ; 2'; '; -terpyridines

Journal:

Tetrahedron

Volume:

60

Number:

29

Pages:

6121-6128