Ultrafast dynamics in Cu(I)bisdiimine complexes from resonance Raman intensities

✍ Scribed by Samuel J. Lind; Keith C. Gordon; Mark R. Waterland

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 450 KB
• Volume: 39
• Category: Article
• ISSN: 0377-0486
• DOI: 10.1002/jrs.2038

✦ Synopsis

Abstract

Resonance Raman intensity analysis is used to examine the excited‐state dynamics in the Franck‐Condon region of the metal‐to‐ligand charge‐transfer (MLCT) states of a series of [Cu(I)(L)~2~]^+^ complexes where L = 2,2′‐bipyridyl (bpy), 1,10‐phenanthroline (phen) and 2,9‐dimethyl‐1,10‐phenanthroline (dmp). Large displacements are observed along phenanthroline ring‐breathing modes (ν~117~ and ν~119~ modes) and a methyl distortion mode (ν~83~) for [Cu(I)(dmp)~2~]^+^. Ring‐breathing modes also dominate the [Cu(I)(phen)~2~]^+^ and [Cu(I)(bpy)~2~]^+^ spectra. The enhancement patterns indicate that the dynamics in the Franck‐Condon region occur almost exclusively along ligand modes, with very little motion involving distortion of the copper coordination sphere. Copyright © 2008 John Wiley & Sons, Ltd.