Abstract
The photophysics of the fac-[Re(Cl)(CO) 3(CO 2Et-dppz)] (CO 2Et-dppz = dipyrido[3,2a:2′,3′c]phenazine-11-carboxylic ethyl ester) was studied with picosecond time-resolved infrared ( ps-TRIR) spectroscopy in metal carbonyl (2100–1800 cm −1) and organic ester (1800–1600 cm −1) spectral regions. The ps-TRIR spectra in both regions give evidence for the formation of a metal-to-ligand charge transfer (MLCT) excited state. The magnitude of ν(CO) shift in the metal carbonyl region of the excited state relative to those of the ground state allows the excited state to be described more precisely as a dπ(Re) → π* (phenazine) 3 MLCT state.
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