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Femtosecond studies of the excited-state dynamics of ester-alkyloxy substituted zinc phthalocyanines

Paper ID Volume ID Publish Year Pages File Format Full-Text
27079 43999 2012 6 PDF Available
Title
Femtosecond studies of the excited-state dynamics of ester-alkyloxy substituted zinc phthalocyanines
Abstract

The ultrafast dynamics of two zinc(II) phthalocyanine derivatives with potential applications in photodynamic therapy was studied by femtosecond transient absorption spectroscopy. The kinetic features of the compounds were determined at excitation wavelengths within the Soret and the Q-bands. Three time constants revealed in time-resolved data were identified with the processes of solvent relaxation, heat transfer from the molecule to the solvent and the excited-state deactivation. The presence of long ester-alkyloxy substituents at non-peripheral positions of the molecule leads to the slow-down of the thermalization of the molecules and shortens the excited-state lifetime by a factor of approximately 3.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► We recorded transient absorption spectra for zinc phthalocyanine and its derivatives. ► Ester-alkyloxy substituents shorten the excited-state lifetime by a factor of 3. ► We did not observe any ultrafast processes undesired in photodynamic therapy.

Keywords
Photodynamic therapy; Phthalocyanines; Photosensitizer; Photophysics; Transient absorption spectroscopy
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 232, 15 March 2012, Pages 44–49
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us