Investigation of ultrafast energy transfer mechanism in BODIPY–Porphyrin dyad system

Dumanoğulları F. M., Tutel Y., Küçüköz B., SEVİNÇ G., KARATAY A., Yılmaz H., ...Daha Fazla

Journal of Photochemistry and Photobiology A: Chemistry, cilt.373, ss.116-121, 2019 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 373
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1016/j.jphotochem.2019.01.007
  • Dergi Adı: Journal of Photochemistry and Photobiology A: Chemistry
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.116-121
  • Anahtar Kelimeler: Borondipyrromethene, Fast energy transfer, Porphyrin, Ultrafast pump-probe spectroscopy
  • Bilecik Şeyh Edebali Üniversitesi Adresli: Evet

Özet

Novel β-fused BODIPY-Porphyrin compounds that contain free base porphyrin (TPP2BDP) and its Ni(II) complex (NiTPP2BDP) were synthesized to investigate intramolecular energy transfer mechanisms of β-fused BODIPY-porphyrin dyads and effect of the unfilled d shell metal ion on energy transfer mechanism. Fluorescence spectra of compounds exhibited that BODIPY emission was diminished upon excitation of the BODIPY unit because of the energy transfer from BODIPY to porphyrin unit. Femtosecond pump-probe spectroscopy measurements revealed that energy transfer of investigated compounds are faster than previous studies in literature. Rapid energy transfer (about 500 fs) from BODIPY to porphyrin was observed for both compounds when BODIPY unit is excited due to direct linkage of BODIPY to porphyrin unit. Intersystem crossing mechanism was also observed for the compound that contains free base porphyrin (TPP2BDP), whereas d-d transition was observed for the compound that contains metalloporphyrin (NiTPP2BDP) due to unfilled d orbital of Ni(II) ion.