Two-dimensional time-frequency ultrafast infrared vibrational echo spectroscopy.
2D spectrally resolved ultrafast (<200 fs) IR vibrational echo experiments were performed on Rh(CO)(2)acac [(acetylacetonato)dicarbonylrhodium (I)]. The 2D spectra display features that reflect the 0-1 and 1-2 transitions and the combination band transition of the symmetric (S) and antisymmetric (A) CO stretching modes. Three oscillations in the data arise from the frequency difference between the S and A modes (quantum beats) and the S and A anharmonicities. A new explanation is given for these "anharmonic" oscillations. Calculations show that spectral resolution enables the 0-1 and 1-2 dephasing to be measured independently.
Merchant
K A
KA
Department of Chemistry, Stanford University, Stanford, California 94305, USA.
Thompson
D E
DE
Fayer
M D
MD
D009942:Organometallic Compounds / Q000737:chemistry*; D012238:Rhodium; D012815:Signal Processing, Computer-Assisted; D013055:Spectrophotometry, Infrared / Q000379:methods*; D013816:Thermodynamics
D009942:Organometallic Compounds; C430324:(acetylacetonato)dicarbonylrhodium(I); D012238:Rhodium