Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
26500 | Journal of Photochemistry and Photobiology A: Chemistry | 2014 | 4 Pages |
Abstract
•The open-aperture z-scan technique is applied to measure two-photon absorption.•The studied tumor photosensitizers show good two-photon absorption at 1.05–1.45 μm.•The two-photon absorption is lower for circular than for linear polarized light.
The two-photon absorption of the photosensitizers 5,10,15,20-tetrakis(m-hydroxyphenyl) porphyrin and the corresponding chlorin has been studied in the near infrared (IR) range using open-aperture z-scan technique. We found cross sections of 10–40 GM in the Q-band region, comparable to values in the Soret-band. Both photosensitizers are promising candidates for IR two-photon photodynamic therapy given the better penetration of IR light into tissue.
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Authors
Baidaa Hamed, Theodore von Haimberger, Valeri Kozich, Arno Wiehe, Karsten Heyne,