Singlet Oxygen Quantum Yield Determination for a Fluorene-Based Two-Photon Photosensitizer

被引：0
作者：
Kevin D. Belfield
Mykhailo V. Bondar
Olga V. Przhonska
机构：
[1] University of Central Florida,Department of Chemistry and College of Optics and Photonics, CREOL and FPCE
[2] Institute of Physics,undefined
来源：
Journal of Fluorescence | 2006年 / 16卷 / 1期
关键词：
Singlet Oxygen; Photosensitizer; Two-Photon; Fluorene;
D O I：
10.1007/PL00021939
中图分类号：
学科分类号：
摘要：
The quantum yield, ΦΔ, 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 1O2, 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, ΦΔ ≈ 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.
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页码：111 / 117
页数：6
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