Emitting state energies and vibronic structure in the luminescence spectra of trans-dioxorhenium(V) complexes

✍ Scribed by Carole Savoie; Christian Reber

• Book ID: 104111906
• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 877 KB
• Volume: 171
• Category: Article
• ISSN: 0010-8545
• DOI: 10.1016/s0010-8545(98)90059-5

✦ Synopsis

The luminescence properties of a series of" lrans-dioxo complexes of rhenium(V) with nitrogen donor ligands are summarized and their luminescence spectra analyzed New emissions in the visible to near infrared wavelength Iegion are observed for dioxo complexes with imidazo!e and ethylenediamine ligands. The intensity distribution within the main progression of the resolved spectra is very similar for all compounds, despite a variation of the luminescence band maxima by approximately 3000 cm -~ within the series of complexes. Molecular orbital and crystal field models are combined with time-dependent theory to analyze the experimental results. Unusual vibronic structure is shown to arise from coupling between the tAlg (Dah point group) ground state and a ~A~g excited state, an effect that is correlated with excited state energies. (