Recent developments in the detection of singlet oxygen with molecular spectroscopic methods

Wu, Haiyan; Song, Qijun; Ran, Guoxia; LU, Xiao-Mu; Xu, Baoguo

doi:10.1016/j.trac.2010.08.009

Cited by 102 publications

(66 citation statements)

References 69 publications

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“…[5,[10][11][12][13][14] Moreover, many organic UV filters are also well-known for their photo-instability resulting in the production of carcinogenic reactive oxygen species (ROS) upon solar irradiation. [15][16][17][18] One prospective method to improve the stability of organic UV filters whilst also minimizing skin contact is to incorporate them into nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

Size and Optically Tunable Ethyl Cellulose Nanoparticles as Carriers for Organic UV Filters

et al. 2018

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Optically active nanoparticles (NPs) are potential building blocks for bottom‐up functional technology in applications such as displays, sensors, and sunscreens. For sunscreens in particular, NPs can be used as delivery systems for organic UV filters in order to minimise skin exposure to these molecules. Here, we investigate the synthesis of size‐tunable ethyl cellulose NPs (ECNPs) and their application as carriers for multiple organic UV filters. We prepared ECNPs with sizes of 50 to 165 nm via an antisolvent precipitation technique and investigate the incorporation of three commonplace organic UV filters – oxybenzone, avobenzone, and octinoxate – into the ECNPs. We found the particle loading varied greatly with each UV filter. Photodegradation of the UV filters remained unchanged upon incorporation into ECNPs and was not affected by co‐encapsulating the antioxidant α‐tocopherol. These results can significantly advance the development of environmentally friendly functionalized nanoparticles and UV‐protective coatings.

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Section: Introductionmentioning

confidence: 99%

Size and Optically Tunable Ethyl Cellulose Nanoparticles as Carriers for Organic UV Filters

et al. 2018

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“…1 O 2 , the lowest excited state of molecular oxygen, can be used as a highly active oxidant in chemical, biological and environmental systems . 1 O 2 can be easily generated in solution by energy transfer from excited photosensitizers or chemically, which are the most common procedures . 1 O 2 has a standard potential E°( 1 O 2 / O 2 • ) equal to 0.65 V vs. NHE at pH 7 and its lifetime in aqueous solution depends on the presence of scavengers (DOM in natural waters), being 4 µs in pure water .…”

Section: Determination Of Reactive Oxygen Species Involved In Advancementioning

confidence: 99%

“…1 O 2 can be easily generated in solution by energy transfer from excited photosensitizers or chemically, which are the most common procedures . 1 O 2 has a standard potential E°( 1 O 2 / O 2 • ) equal to 0.65 V vs. NHE at pH 7 and its lifetime in aqueous solution depends on the presence of scavengers (DOM in natural waters), being 4 µs in pure water . The direct measurement of the luminescence emitted by 1 O 2 has been carried out at 1270 nm, althought sometimes the weak signal recorded hinders the application of this direct analytical method .…”

Section: Determination Of Reactive Oxygen Species Involved In Advancementioning

confidence: 99%

“…35,101,147 Among the different compounds tested as molecular probes in different AOPs, although luminol is the most applied one to determine O 2 -• , MCLA, NBT and XTT may have easier application, simpler implementation and better results than luminol due to the fact that analytical quantification techniques are simpler and, above all, these probes are less affected by the presence of interferences such as H 2 O 2 , metals and ionic species that may oxidize the probes. 28,155 The direct measurement of the luminescence emitted by 1 O 2 has been carried out at 1270 nm, althought sometimes the weak signal recorded hinders the application of this direct analytical method. 158,159 The research group of Daimon 160 -162 studied the production of 1 O 2 in TiO 2 photocatalysis, monitoring its phosphorescence and lifetime under various reaction conditions such as: presence of additives (KBr, KSCN, KI, H 2 O 2 ), pH, size of TiO 2 particles and gaseous environment (N 2 or O 2 ), and also investigating the mechanism that leads to the formation of 1 O 2 .…”

Section: Superoxide and Hydroperoxyl Radical Omentioning

confidence: 99%

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Insight on the fundamentals of advanced oxidation processes. Role and review of the determination methods of reactive oxygen species

Fernández-Castro

Vallejo

Román

et al. 2015

J of Chemical Tech & Biotech

189

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Advanced oxidation processes (AOPs) have known increased application to treat wastewaters containing recalcitrant compounds that are hardly degraded by conventional technologies. AOPs are characterized by the formation of strong oxidants such as hydroxyl radicals, superoxide anions, hydroperoxyl radicals and singlet oxygen, which react with the contaminant, contributing to its degradation. This paper provides an overview of the determination methods of reactive oxygen species, ROS, in the application of AOPs; the methods developed in the available literature for the detection and quantification of ROS are reviewed as a first step in the assessment and detailed description of the mechanisms involved in the oxidation reactions, focusing on the critical analysis of the main strengths and weaknesses presented by the probe molecules employed in the evaluated studies.

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“…Therefore, the following text will focus on frequently used detection techniques for this type of ROS. Wu et al have recently summarized methods of 1 O 2 detection [16], with focus on the recent technical advances. To investigate the chemistry of 1 O 2 , several analytical tools are available to obtain information about the concentration, the spatial distribution, and the temporal behavior of 1 O 2 formation, including spectrophotometry, fluorimetry, and (chemi)luminometry.…”

Section: Characterization Of the Photochemical And Photophysical Pmentioning

confidence: 99%

A Comprehensive Tutorial onIn VitroCharacterization of New Photosensitizers for Photodynamic Antitumor Therapy and Photodynamic Inactivation of Microorganisms

Kiesslich

Gollmer

Maisch

et al. 2013

BioMed Research International

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In vitro research performed on eukaryotic or prokaryotic cell cultures usually represents the initial step for characterization of a novel photosensitizer (PS) intended for application in photodynamic therapy (PDT) of cancer or photodynamic inactivation (PDI) of microorganisms. Although many experimental steps of PS testing make use of the wide spectrum of methods readily employed in cell biology, special aspects of working with photoactive substances, such as the autofluorescence of the PS molecule or the requirement of light protection, need to be considered when performing in vitro experiments in PDT/PDI. This tutorial represents a comprehensive collection of operative instructions, by which, based on photochemical and photophysical properties of a PS, its uptake into cells, the intracellular localization and photodynamic action in both tumor cells and microorganisms novel photoactive molecules may be characterized for their suitability for PDT/PDI. Furthermore, it shall stimulate the efforts to expand the convincing benefits of photodynamic therapy and photodynamic inactivation within both established and new fields of applications and motivate scientists of all disciplines to get involved in photodynamic research.

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Recent developments in the detection of singlet oxygen with molecular spectroscopic methods

Cited by 102 publications

References 69 publications

Size and Optically Tunable Ethyl Cellulose Nanoparticles as Carriers for Organic UV Filters

Size and Optically Tunable Ethyl Cellulose Nanoparticles as Carriers for Organic UV Filters

Insight on the fundamentals of advanced oxidation processes. Role and review of the determination methods of reactive oxygen species

A Comprehensive Tutorial onIn VitroCharacterization of New Photosensitizers for Photodynamic Antitumor Therapy and Photodynamic Inactivation of Microorganisms

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