An experimental and theoretical study on the photophysical properties of methylene green

Glusko, Carlos A.; Previtali, Carlos M.; Vera, D. Mariano A.; Chesta, Carlos A.; Montejano, Hernán A.

doi:10.1016/j.dyepig.2010.11.003

Cited by 12 publications

(3 citation statements)

References 73 publications

(36 reference statements)

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“…The Φ Δ value determined was 0.43 and highlights the potential of AlPcCl as PS in PDI. Still, the value is similar to other PS, such as toluidine blue 0.5 , zinc phthalocyanine 0.53 , cobalt phthalocyanine 0.55 , nickel phthalocyanine 0.52 , hypericin 0.39 and methylene blue 0.55 , that has been studied and applied in PDI and PDT.…”

Section: Resultssupporting

confidence: 70%

Formulation of Aluminum Chloride Phthalocyanine in Pluronic^™ P‐123 and F‐127 Block Copolymer Micelles: Photophysical properties and Photodynamic Inactivation of Microorganisms

Vilsinski

Gerola

Enumo

et al. 2015

Photochem & Photobiology

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Aluminum Chloride Phthalocyanine (AlPcCl) can be used as a photosensitizer (PS) for Photodynamic Inactivation of Microorganisms (PDI). The AlPcCl showed favorable characteristics for PDI due to high quantum yield of singlet oxygen (ΦΔ ) and photostability. Physicochemical properties and photodynamic inactivation of AlPcCl incorporated in polymeric micelles of tri-block copolymer (P-123 and F-127) against microorganisms Staphylococcus aureus, Escherichia coli and Candida albicans were investigated in this work. Previously, it was observed that the AlPcCl undergoes self-aggregation in F-127, while in P-123 the PS is in a monomeric form suitable for PDI. Due to the self-aggregation of AlPcCl in F-127, this formulation did not show any effect on these microorganisms. On the other hand, AlPcCl formulated in P-123 was effective against S. aureus and C. albicans and the death of microorganisms was dependent on the PS concentration and illumination time. Additionally, it was found that the values of PS concentration and illumination time to eradicate 90% of the initial population of microorganisms (IC90 and D90 , respectively) were small for the AlPcCl in P-123, showing the effectiveness of this formulation for PDI.

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Section: Resultssupporting

confidence: 70%

Formulation of Aluminum Chloride Phthalocyanine in Pluronic^™ P‐123 and F‐127 Block Copolymer Micelles: Photophysical properties and Photodynamic Inactivation of Microorganisms

Vilsinski

Gerola

Enumo

et al. 2015

Photochem & Photobiology

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“…The solvatochromism observed in this study was evaluated through the solvent parameters shown in Table 1 -scale E T (30), dipole moment (m), dielectric constant (e), absolute viscosity (h) and refractive index (n) -in order of increasing polarity.…”

Section: Spectroscopic Studies Of Porphyrins In Homogeneous Systemsmentioning

confidence: 99%

“…It should be noticed that in all solvents, the fluorescence decay parameters depend on the molecular structure of the solvent, with special emphasis on its polarity. In addition, it is well-known that both the values of fluorescence lifetime and the fluorescence quantum yield have a decreasing tendency as the solvent polarity increases [30,31].…”

Section: Spectroscopic Studies Of Porphyrins In Homogeneous Systemsmentioning

confidence: 99%

Photophysical properties of porphyrin derivatives: Influence of the alkyl chains in homogeneous and micro-heterogeneous systems

Santos

Moreira

Novo

et al. 2015

J. Porphyrins Phthalocyanines

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This work is focused on the evaluation of the photophysical properties of protoporphyrin-IX derivatives with different alkyl chains. The goal of this work is to understand the physicochemical properties and select prototypes of photosensitizers for photodynamic therapy. Solvents with different dielectric constants were used to obtain relevant data on different physical and chemical processes, such as fluorescence quantum yield and emission level of aggregation in nonpolar media. In addition, studies were conducted in micro-heterogeneous systems through the interaction of porphyrin derivatives with different surfactants, such as cetyltrimethylammonium bromide, sodium dodecyl sulfate and octyl phenol ethoxylate. The compounds were characterized by electronic absorption spectroscopy in the ultraviolet-visible region and fluorescence emission spectroscopy. The comparative study between the different chemical environments evaluated in the present study represents a relevant contribution to the comprehension of the properties acquired by the porphyrins in different micro-heterogeneous systems, which allows us to understand various interactions that these compounds are subject in biological medium, such as the influence of the polarity of the medium in the reactivity of porphyrins with nonpolar substituents. These results show the decisive physicochemical influence of the alkyl chains on the properties of the tetraazomacrocycle porphyrin. +55 11-4996-0155 J. Porphyrins Phthalocyanines Downloaded from www.worldscientific.com by EMORY UNIVERSITY on 07/30/15. For personal use only. J. Porphyrins Phthalocyanines Downloaded from www.worldscientific.com by EMORY UNIVERSITY on 07/30/15. For personal use only.

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3H‐Phenothiazin‐3‐one: A Photocatalyst for the Aerobic Photochemical Oxidation of Sulfides to Sulfoxides

Spyropoulou,

Skolia,

Flesariu

et al. 2023

Adv Synth Catal

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In this study, 3H‐phenothiazin‐3‐one is identified as a photocatalyst for the photochemical oxidation of sulfides to sulfoxides. This photocatalytic method uses a low catalyst loading (0.05 mol%), molecular oxygen as the sole oxidant, and a blue LED lamp as the irradiation source. It can be applied to the oxidation of both alkyl‐aryl and alkyl‐alkyl sulfides. Moreover, the method is also applicable in the synthesis of the known pharmaceutically active compounds Modafinil and Sulforaphane.

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An experimental and theoretical study on the photophysical properties of methylene green

Cited by 12 publications

References 73 publications

Formulation of Aluminum Chloride Phthalocyanine in Pluronic^™ P‐123 and F‐127 Block Copolymer Micelles: Photophysical properties and Photodynamic Inactivation of Microorganisms

Formulation of Aluminum Chloride Phthalocyanine in Pluronic^™ P‐123 and F‐127 Block Copolymer Micelles: Photophysical properties and Photodynamic Inactivation of Microorganisms

Photophysical properties of porphyrin derivatives: Influence of the alkyl chains in homogeneous and micro-heterogeneous systems

3H‐Phenothiazin‐3‐one: A Photocatalyst for the Aerobic Photochemical Oxidation of Sulfides to Sulfoxides

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An experimental and theoretical study on the photophysical properties of methylene green

Cited by 12 publications

References 73 publications

Formulation of Aluminum Chloride Phthalocyanine in Pluronic™ P‐123 and F‐127 Block Copolymer Micelles: Photophysical properties and Photodynamic Inactivation of Microorganisms

Formulation of Aluminum Chloride Phthalocyanine in Pluronic™ P‐123 and F‐127 Block Copolymer Micelles: Photophysical properties and Photodynamic Inactivation of Microorganisms

Photophysical properties of porphyrin derivatives: Influence of the alkyl chains in homogeneous and micro-heterogeneous systems

3H‐Phenothiazin‐3‐one: A Photocatalyst for the Aerobic Photochemical Oxidation of Sulfides to Sulfoxides

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Formulation of Aluminum Chloride Phthalocyanine in Pluronic^™ P‐123 and F‐127 Block Copolymer Micelles: Photophysical properties and Photodynamic Inactivation of Microorganisms

Formulation of Aluminum Chloride Phthalocyanine in Pluronic^™ P‐123 and F‐127 Block Copolymer Micelles: Photophysical properties and Photodynamic Inactivation of Microorganisms