Photophysics of squaraine dyes: role of charge-transfer in singlet oxygen production and removal

The Journal of Physical Chemistry. a
Patrizio SalicePeter R Ogilby

Abstract

The unique optical properties of squaraines render these molecules useful for applications that range from xerography to photodynamic therapy. In this regard, squaraines derived from the condensation of nitrogen-based heterocycles and squaric acid have many promising attributes. Key solution-phase photophysical properties of six such squaraines have been characterized in this study. One feature of these molecules is a pronounced absorption band in the region approximately 600-720 nm that has significant spectral overlap with the fluorescence band (i.e., the Stokes shift is small). As such, effects of emission/reabsorption yield unique excitation wavelength dependent phenomena that are manifested in quantum yields of both fluorescence and sensitized singlet oxygen production. Comparatively small squaraine-sensitized yields of singlet oxygen production and, independently, large rate constants for squaraine-induced deactivation of singlet oxygen are consistent with a model in which there is appreciable intra- and intermolecular charge-transfer in the squaraine and squaraine-oxygen encounter complex, respectively. The results reported herein should be useful in the further development of these compounds for a range of oxygen-depend...Continue Reading

References

May 15, 2003·Chemical Reviews·Claude Schweitzer, Reinhard Schmidt
Jan 6, 2005·Journal of the American Chemical Society·Peter K FrederiksenPeter R Ogilby
Jul 28, 2005·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·Zhongmin XiangSteven A Reeves
Aug 27, 2005·The Journal of Organic Chemistry·Christian B NielsenMikkel Jørgensen
Apr 29, 2006·Photochemistry and Photobiology·Martin J PatersonPeter R Ogilby
Jun 3, 2006·Photochemistry and Photobiology·Robert W Redmond, Irene E Kochevar
Aug 4, 2007·Journal of the American Chemical Society·Jun-Ho YumMohammad K Nazeeruddin
Dec 9, 2008·Journal of the American Chemical Society·Fabio SilvestriTobin J Marks
Jun 11, 2009·Journal of the American Chemical Society·Marina K KuimovaPeter R Ogilby
Feb 11, 2010·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Franco M CabrerizoPeter R Ogilby

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Citations

Mar 1, 2013·ACS Applied Materials & Interfaces·Anand ParthasarathyKirk S Schanze
Feb 9, 2012·International Journal of Molecular Sciences·Luís F Vieira FerreiraPaulo F Santos
Jul 23, 2013·Photochemistry and Photobiology·Frederico M PimentaPeter R Ogilby
Jan 13, 2015·Journal of the American Chemical Society·Michael WestbergPeter R Ogilby
Apr 1, 2015·Chemical Communications : Chem Comm·Ruixiang WuSuotang Jia
Dec 25, 2015·Physical Chemistry Chemical Physics : PCCP·Harald CeymannChristoph Lambert
May 6, 2015·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Mikkel BregnhøjPeter R Ogilby
Jan 3, 2015·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Frederico M PimentaPeter R Ogilby
Oct 7, 2016·Dalton Transactions : an International Journal of Inorganic Chemistry·Lara RiehlH-Jürgen Meyer
Sep 3, 2014·Journal of Computational Chemistry·Marta E AlbertoNino Russo
Dec 20, 2011·Organic & Biomolecular Chemistry·Rekha R AvirahDanaboyina Ramaiah
Feb 2, 2017·Beilstein Journal of Organic Chemistry·Ulrike Kauscher, Bart Jan Ravoo
Sep 28, 2013·Journal of Materials Chemistry. B, Materials for Biology and Medicine·Ragini JettyStephen H Foulger
Sep 12, 2013·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Kevin D BelfieldOlga V Przhonska
Aug 16, 2013·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·D P FerreiraL F Vieira Ferreira
Aug 7, 2020·Journal of Computational Chemistry·Erix W Hernández-RodríguezJulio Caballero
Feb 11, 2021·Chemistry : a European Journal·Pichandi AshokkumarAndrey S Klymchenko
Apr 4, 2012·The Journal of Physical Chemistry. B·Cristina SissaSatish Patil
Nov 26, 2010·Organic Letters·Nagappanpillai AdarshDanaboyina Ramaiah
Apr 10, 2015·The Journal of Physical Chemistry. B·Mikkel BregnhøjPeter R Ogilby
Mar 13, 2014·The Journal of Organic Chemistry·Stephan K PedersenPeter R Ogilby
Aug 1, 2019·Bioconjugate Chemistry·Kristina IlinaMaged Henary
Jun 20, 2013·The Journal of Physical Chemistry. B·K M ShafeekhAnna Painelli
Oct 31, 2020·Chemical Reviews·Roy WeinstainPetr Klán
Feb 16, 2017··Simone GallianoClaudia Barolo

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