Singlet Oxygen

Wasserman, Harry H.; Desimone, Robert; Chia, Kristie R. X.; Banwell, Martin G.

doi:10.1002/047084289x.rs035

Cited by 10 publications

(10 citation statements)

References 157 publications

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“…Nevertheless, the majority of commercially available quenchers pose several problems with regard to their use, e.g. instability to light (carotenes), intrinsic color (extensive conjugated systems and nickel dimethyldithiocarbamates), tendency to induce radicals (DABCO) and poor quenching efficiency in the adsorbed state [24,25].…”

Section: Effectiveness Of Uv Absorbers On Light Fastness Of Dyesmentioning

confidence: 99%

UV Protection and Photostabilization of Dyes Provided by Benzophenone UV Absorbers Containing a Built-in Benzotriazole Moiety

Oda

2011

Sen-i Gakkaishi

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Section: Effectiveness Of Uv Absorbers On Light Fastness Of Dyesmentioning

confidence: 99%

UV Protection and Photostabilization of Dyes Provided by Benzophenone UV Absorbers Containing a Built-in Benzotriazole Moiety

Oda

2011

Sen-i Gakkaishi

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“…As an alternative, the reactive oxygen species (ROS) singlet oxygen ( 1 O 2 ) is both readily generated photochemically and can cleave specific chemical bonds. 1 O 2 engages in [2 + 2] cycloadditions and ene reactions and can also act as a dienophile, oxidizing anthracenes, and other polycyclic aromatic hydrocarbons to endoperoxides through [4 + 2] cycloaddition reactions. − The cytotoxic nature of 1 O 2 makes it important in photodynamic therapy, a treatment that uses a photosensitizer to produce ROS upon irradiation to destroy cancer cells . The ubiquity and ease of generation of 1 O 2 has led to the concept of 1 O 2 cleaving chemical bonds selectively.…”

Section: Introductionmentioning

confidence: 99%

Polymer Amphiphiles for Photoregulated Anticancer Drug Delivery

Brega

Scaletti

Zhang

et al. 2018

ACS Appl. Mater. Interfaces

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We report the synthesis of amphiphilic polymers featuring lipophilic stearyl chains and hydrophilic poly(ethylene glycol) (PEG) polymers that are connected through singlet oxygencleavable alkoxyanthracene linkers. These amphiphilic polymers assembled in water to form micelles with diameters of ~2 0 nm. Reaction of the alkoxyanthracene linkers with light and O 2 cleaved the ether C-O bonds, resulting in formation of the corresponding 9,10-anthraquinone derivatives and concomitant disruption of the micelles. These micelles were loaded with the chemotherapeutic agent doxorubicin, which was efficiently released upon photo-oxidation. The drug-loaded reactive micelles were effective at killing cancer cells in vitro upon irradiation at 365 nm, functioning through both doxorubicin release and photodynamic mechanisms.

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“…SDO is an important intermediate in a number of chemical reactions of biological, medical and environmental significance [18]. It has been implicated in the photochemical transformations of air pollutants [19] and in the degradation of polymers [20]. Also, O 2 (a 1 g ) and O 2 (b 1 Σ + g ) molecules play an important role in the photochemistry of ozone in the middle and upper atmosphere [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Physics and chemistry of the influence of excited molecules on combustion enhancement

Starik

Loukhovitski

Sharipov

et al. 2015

Phil. Trans. R. Soc. A.

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The paper addresses detailed analysis of kinetic processes in the H 2 −O 2 , CO−O 2 and CH 4 −O 2 -reactive systems upon the presence of singlet oxygen molecules O 2 ( a 1 Δ g ) and and the influence of the activation of oxygen molecules in electric discharge on the acceleration of ignition in the H 2 −O 2 and CH 4 −O 2 mixtures. The possibility of the intensification of CO oxidation due to excitation of O 2 and N 2 molecule vibrations and generation of singlet oxygen molecules is also considered. It is shown that the effect of accelerating the ignition strongly depends on the reduced electric field and, as a consequence, on the composition of discharge plasma as well as on the features of chain mechanism development in oxy-fuel systems. It is revealed that the most effective approach for the intensification of CO oxidation both in the moist air and in the products of hydrocarbon combustion in air is the generation of O 2 ( a 1 Δ g ) molecules by electric discharge. Computations showed that the presence of 1% O 2 ( a 1 Δ g ) in the total oxygen allowed one to convert CO to CO 2 even at the temperature T =850–900 K in the time of 10 −2 s. The excitation of O 2 and N 2 molecule vibrations is less effective for such a conversion.

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Singlet Oxygen

Cited by 10 publications

References 157 publications

UV Protection and Photostabilization of Dyes Provided by Benzophenone UV Absorbers Containing a Built-in Benzotriazole Moiety

UV Protection and Photostabilization of Dyes Provided by Benzophenone UV Absorbers Containing a Built-in Benzotriazole Moiety

Polymer Amphiphiles for Photoregulated Anticancer Drug Delivery

Physics and chemistry of the influence of excited molecules on combustion enhancement

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