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Photoinduced intermolecular electron transfer and off-resonance Raman characteristics of Rhodamine 101/N,N-diethylaniline

  • Li Lin Jiang
  • , Wei Long Liu
  • , Yun Fei Song
  • , Xing He
  • , Yang Wang
  • , Chang Wang
  • , Hong Lin Wu
  • , Fang Yang
  • , Yan Qiang Yang*
  • *Corresponding author for this work
  • Harbin Institute of Technology
  • Hezhou University
  • China Academy of Engineering Physics

Research output: Contribution to journalArticlepeer-review

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 languageEnglish
Pages (from-to)12-19
Number of pages8
JournalChemical Physics
Volume429
DOIs
StatePublished - 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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