Modulating the two photon absorption features of aza-BODIPY derivatives depending on the electron-donating substituents in near-IR region

Doğan A., Yılmaz H., Karatay A., Yıldız E., Sevinç G., Boyacıoğlu B., ...Daha Fazla

Synthetic Metals, cilt.313, 2025 (SCI-Expanded) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 313
  • Basım Tarihi: 2025
  • Doi Numarası: 10.1016/j.synthmet.2025.117887
  • Dergi Adı: Synthetic Metals
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
  • Anahtar Kelimeler: Aza-BODIPY, DFT, Intramolecular charge transfer, Open aperture Z-scan, Two-photon absorption, Ultrafast pump-probe spectroscopy
  • Bilecik Şeyh Edebali Üniversitesi Adresli: Evet

Özet

Aza-BODIPY derivatives are promising candidates for optical applications due to their tunable two-photon absorption (TPA) properties in the near-infrared (NIR) region. In this study, symmetrical aza-BODIPY compounds were synthesized and functionalized with electron-donating groups at the 2,6-positions to investigate their impact on TPA and photophysical properties. The compounds exhibited notable hypsochromic shifts and fluorescence quenching, with the highest TPA cross-section observed for BOD1 (37 GM) at 1000 nm wavelength due to efficient charge transfer characteristics. Density Functional Theory (DFT) calculations provided insights into the electronic structures, revealing that BOD4 was the most stable, exhibiting complex electronic transitions. The findings suggest that these aza-BODIPY derivatives are suitable candidates for NIR imaging, optical power limiting, and two-photon photodynamic therapy. This study demonstrates the potential of structural modifications to fine-tune TPA properties, paving the way for advanced optical applications.