Abstract
The quantum yield, Φ Δ, of singlet oxygen generation under two-photon excitation has been determined for a fluorene derivative. A photochemical method was developed using 1,3-diphenylisobenzofuran (DPBF), a chemical quencher of 1O 2, and 2-(9,9-didecyl-7- nitrofluoren-2-yl)benzothiazole (1) as a two-photon photosensitizer (PS). The photochemical kinetics of the quencher was measured by two different fluorescence methods. Fluorene 1 exhibited relatively high singlet oxygen quantum yield, Φ Δ∈≈∈0.4∈±∈0. 1, and had a two-photon absorption cross-section of 28∈±∈5GM. Thus, 1 may have potential for use as a two-photon PS in the near-IR spectral region for biomedical applications.
Original language | English (US) |
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Pages (from-to) | 111-117 |
Number of pages | 7 |
Journal | Journal of Fluorescence |
Volume | 16 |
Issue number | 1 |
DOIs | |
State | Published - Jan 2006 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Biochemistry
- Spectroscopy
- Clinical Biochemistry
Keywords
- Fluorene
- Photosensitizer
- Singlet Oxygen
- Two-Photon