Photophysical study of photoinduced electron transfer in a bis-thiophene substituted peryleneimide

Fron E., Lor M., Pilot R., Schweitzer G., DİNÇALP H., De Feyter S., ...Daha Fazla

PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES, cilt.4, sa.1, ss.61-68, 2005 (SCI-Expanded, Scopus) identifier identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 4 Sayı: 1
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1039/b409346c
  • Dergi Adı: PHOTOCHEMICAL & PHOTOBIOLOGICAL SCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.61-68
  • Manisa Celal Bayar Üniversitesi Adresli: Hayır

Özet

Based on femtosecond time-resolved spectroscopy and single photon timing experiments, intramolecular photoinduced charge transfer has been investigated in two systems containing a peryleneimide chromophore ( P) and thiophene ( T) groups. The first compound bearing a single thiophene ring (PT1) is used as model and shows a behavior similar to P, studied previously, while in the compound with two thiophene rings attached (PT2) electron transfer from the thiophene donor to the peryleneimide acceptor is observed in benzonitrile. Femtosecond fluorescence upconversion and femtosecond transient absorption experiments in benzonitrile indicate that this ion-pair state formation occurs in 19 ps. This ion-pair state then decays with two time constants of 1400 and 820 ps, probably corresponding to different conformations of the thiophene rings.