Singlet oxygen quantum yield determination for a fluorene-based two-photon photosensitizer
Abbreviated Journal Title
singlet oxygen; photosensitizer; two-photon; fluorene; PHOTODYNAMIC THERAPY; TRIPLET-STATES; PHOTOCHEMICAL PROPERTIES; MOLECULAR-OXYGEN; CHARGE-TRANSFER; DERIVATIVES; GENERATION; SENSITIZERS; ABSORPTION; SOLVENTS; Biochemical Research Methods; Chemistry, Analytical; Chemistry, Physical
The quantum yield, Phi(Delta), 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 O-1(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, Phi(Delta) approximate to 0.4 +/- 0.1, and had a two-photon absorption cross-section of 28 +/- 5 GM. Thus, 1 may have potential for use as a two-photon PS in the near-IR spectral region for biomedical applications.
Journal of Fluorescence
"Singlet oxygen quantum yield determination for a fluorene-based two-photon photosensitizer" (2006). Faculty Bibliography 2000s. 5940.