Resonance Raman investigation of the MLCT transition in [Pt(dppm)2(PhC≡C)2] and the MMLCT transition in [Pt2(μ-dppm)2(μ-PhC≡C)(PhC≡C) 2]

Wai Ming Kwok, David Lee Phillips, Phyllis Kok Yan Yeung, Vivian Wing Wah Yam

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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 [Pt2(μ-dppm)2(μ-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 [Pt(dppm)2(PhC≡C)2] which we attribute to emission from the very shortlived initially excited MLCT state. Our quantum yield measurements of this fluorescence yields an excited state lifetime of approximately 80-130 fs.
Original languageEnglish
Pages (from-to)9286-9295
Number of pages10
JournalJournal of Physical Chemistry A
Issue number49
Publication statusPublished - 4 Dec 1997
Externally publishedYes

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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