Near-Infrared Two-Photon Excitation of Protoporphyrin IX: Photodynamics and Photoproduct Generation¶

Rebecca L. Goyan; David T. Cramb

doi:10.1562/0031-8655(2000)072<0821:NITPEO>2.0.CO;2

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Rebecca L. Goyan,¹ David T. Cramb^1,*

¹Department of Chemistry, University of Calgary, Calgary, Alberta, Canada

^*¶Posted on the website on 1 November 2000.*To whom correspondence should be addressed at: Department of Chemistry, University of Calgary, 2500 University Dr. N.W., Calgary, AB T2N 1N4, Canada. Fax: 403-289-9488; dcramb@ucalgary.ca

Abstract

The spectroscopy and photochemistry of protoporphyrin IX in ethanol and in Triton X-100 micelle solution have been examined using near-infrared two-photon excitation (TPE). TPE will allow photodynamic therapy with highly localized light dosage. We have determined that the photochemistry subsequent to TPE is very similar to that found for one-photon excitation. Moreover, the photoproducts observed possess very intense TPE fluorescence spectra, which allows their detection at low relative concentrations.

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Rebecca L. Goyan and David T. Cramb "Near-Infrared Two-Photon Excitation of Protoporphyrin IX: Photodynamics and Photoproduct Generation^¶," Photochemistry and Photobiology 72(6), 821-827, (1 December 2000). https://doi.org/10.1562/0031-8655(2000)072<0821:NITPEO>2.0.CO;2

Received: 29 September 2000; Accepted: 1 October 2000; Published: 1 December 2000

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