Aboshyan-Sorgho, L., Cantuel, M., Petoud, S., Hauser, A. and Piguet, C.

Optical sensitization and upconversion in discrete polynuclear chromium–lanthanide complexes

Coordination Chemistry Reviews (2012) 256 (15-16) 1644-1663

Résumé :

Due to its extreme kinetic inertness, trivalent chromium, Cr(III), has been rarely combined with labile trivalent lanthanides, Ln(III), to give discrete self-assembled (supra)molecular polynuclearcomplexes. However, the plethora of accessible metal-centered excited states possessing variable lifetimes and emissive properties, combined with the design of efficient intramolecular Cr(III) ↔ Ln(III) energy transfer processes open attractive perspectives for programming directional light-conversion within these heterometallic molecules. Efforts made to address this exciting challenge for both light-sensitization and light-upconversion are discussed in this article.