Abstract
Two recent advances in optoelectronics, namely novel near-IR sensitive photomultipliers and inexpensive yet powerful diode-pumped solid-state lasers working at kHz repetition rate, enable the time-resolved detection of singlet oxygen (O2(a1Δg)) phosphorescence in photon counting mode, thereby boosting the time-resolution, sensitivity, and dynamic range of this well-established detection technique. Principles underlying this novel approach and selected examples of applications are provided in this perspective, which illustrate the advantages over the conventional analog detection mode.
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Edited by T. Gensch and C. Viappiani. This paper is derived from the lecture given at theXSchool of Pure andApplied Biophysics Time-resolved spectroscopic methods in biophysics (organized by the Italian Society of Pure and Applied Biophysics), held in Venice in January 2006.
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Jiménez-Banzo, A., Ragàs, X., Kapusta, P. et al. Time-resolved methods in biophysics. 7. Photon counting vs. analog time-resolved singlet oxygen phosphorescence detection. Photochem Photobiol Sci 7, 1003–1010 (2008). https://doi.org/10.1039/b804333g
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DOI: https://doi.org/10.1039/b804333g