Abstract
The ultrafast photoinduced intermolecular electron transfer (PIET) reaction of Rhodamine 101 (Rh101+) in N,N-diethylaniline (DEA) was investigated using off-resonance Raman, femtosecond time-resolved multiplex transient grating (TG) and transient absorption (TA) spectroscopies. The Raman spectra indicate that the C=C stretching vibration of the chromophore aromatic ring is more sensitive to ET compared with the C-C stretching mode. The ultrafast photoinduced intermolecular forward ET (FET) from DEA to Rh101 +* occurs on a time scale of τFET = 425-560 fs. The backward ET (BET) occurs in the inverted region with a time constant of τBET = 46.16-51.40 ps. The intramolecular vibrational relaxation (IVR) process occurs on the excited state potential energy surface with the time constant of τIVR = 2.77-5.39 ps.
| Original language | English |
|---|---|
| Pages (from-to) | 12-19 |
| Number of pages | 8 |
| Journal | Chemical Physics |
| Volume | 429 |
| DOIs | |
| State | Published - 31 Jan 2014 |
Keywords
- Forward electron transfer
- Intramolecular vibrational relaxation
- Multiplex transient grating
- Photoinduced intermolecular electron transfer
- Rhodamine 101
- Transient absorption
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