2013
DOI: 10.1039/c3pp50246e
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Comparison of the photophysical properties of three phenothiazine derivatives: transient detection and singlet oxygen production

Abstract: New methylene blue (NMB+) and methylene violet (MV) are known for their photosensitizing properties for singlet oxygen ((1)O2) generation upon visible-light irradiation, and various examples of their use in the photodynamic inactivation of microorganisms and for photomedicinal purposes have been reported. However, their photophysical properties have never been extensively and systematically analyzed and compared. In the current work, we studied their absorption and fluorescence behavior relative to their paren… Show more

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Cited by 34 publications
(33 citation statements)
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“…Due to the fact that PTZ is an active chromophore, the photochemical behavior of PTZ‐containing drugs has attracted considerable attention, in connection with the possible photosensitizing side‐effects experienced by treated patients . In this context, it has been described that the key photophysical parameters of PTZs can be influenced by factors such as the substitution at positions 1 and 2, the nature of the solvent or the excitation energy .…”
Section: Introductionmentioning
confidence: 99%
“…Due to the fact that PTZ is an active chromophore, the photochemical behavior of PTZ‐containing drugs has attracted considerable attention, in connection with the possible photosensitizing side‐effects experienced by treated patients . In this context, it has been described that the key photophysical parameters of PTZs can be influenced by factors such as the substitution at positions 1 and 2, the nature of the solvent or the excitation energy .…”
Section: Introductionmentioning
confidence: 99%
“…Thus, at the next stage, we prepared a composite based on SiO 2 -coated and uncoated BaGdF 5 : 10% Eu 3+ conjugated with the methylene blue dye, known as an efficient photosensitizer for different applications [ 68 , 69 ]. The emission spectrum of BaGdF 5 :Eu 3+ at least partially overlaps the optical absorption of MB (see Figure 17 a), thus making the latter suitable for nanocomposite construction.…”
Section: Resultsmentioning
confidence: 99%
“…New Methylene Blue is a thiazine class compound used as a dye or antimicrobial agent ( Ragas et al, 2013 ) with an absorption maximum at λ max = 590 nm, a molar extinction coefficient at 525 nm of 471 molL -1 cm -1 and a singlet oxygen quantum yield of 0.66 ± 0.04 in air equilibrated acetonitrile ( Ronzani et al, 2013 ).…”
Section: Methodsmentioning
confidence: 99%