Journal of Physical Chemistry A, Vol.101, No.49, 9286-9295, 1997
Resonance Raman investigation of the MLCT transition in [Pt(dppm)(2)(PhC=C)(2)] and the MMLCT transition in [Pt-2(mu-dppm)(2)(mu-PhC=C)(PhC=C)(2)](+)
We report resonance Raman spectra including absolute Raman cross section measurements obtained with excitation wavelengths within the MLCT absorption band of [Pt(dppm)(2)(PhC=C)(2)] and the MMLCT absorption band of [Pt-2(mu-dppm)(2)(mu-PhC=C)(PhC=C)(2)](+). We have simultaneously simulated the absolute absorption and resonance Raman intensities in order to estimate the vibrational reorganizational energies associated with the MLCT and MMLCT transitions, We observe a small amount of fluorescence background underneath the resonance Raman spectra of [Pr(dppm)(2)(PhC=C)(2)] which we attribute to emission from the very short-lived initially excited MLCT stale, Our quantum yield measurements of this fluorescence yields an excited state lifetime of approximately 80-130 fs.