New Approach in the Application of Conjugated Polymers: The Light-Activated Source of Versatile Singlet Oxygen Molecule

Blacha–Grzechnik, Agata

doi:10.3390/ma14051098

Cited by 8 publications

(4 citation statements)

References 150 publications

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“…1, 34.4 mM/h) because of its enhanced solubility and beneficial π–π conjugation effect. In general, AQs with rigid planar molecular structures and strong π–π conjugation effects are anticipated to maximize their capability to capture hydrogen atoms through visible light excitation . Consequently, the efficient reduction of AQ can be accomplished under homogeneous conditions without the need for H 2 as an external hydrogen source.…”

Section: Resultsmentioning

confidence: 99%

Sustainable and Continuous Flow Preparation of High-Concentration H₂O₂ by Visible-Light-Activated Molecular Oxygen Oxidation of Lower Alcohols

Yu,

Zhao,

et al. 2023

ACS Sustainable Chem. Eng.

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H 2 O 2 is a multifunctional green oxidant, and the preparation of H 2 O 2 by photocatalysis is a kind of green and efficient method; however, the production of terminal H 2 O 2 with a high concentration of up to 10 mmol•g −1 •h −1 under visible light irradiation is a challenge. With this objective, herein, we report a strategy for the homogeneous visible light photocatalytic preparation of H 2 O 2 via the HAT (hydrogen atom transfer) process using commercially available 2-ethylanthraquinone (EAQ) as the photocatalyst. Even under intermittent conditions, the H 2 O 2 generation rate could reach up to 323.32 mM/h (526.6 mmol•g −1 •h −1 ), which represents the fastest photochemical H 2 O 2 production reaction reported. The continuous flow strategy could significantly improve the yield of H 2 O 2 by 91 times to ∼29460 mM/h. A liquid−liquid extraction device that connects with the flow reactor could realize the continuous separation of H 2 O 2 in aqueous solution of up to 11.1 wt % in 1 h with a lower EAQ loading of 0.2−0.3 mol % (∼6.2−9.3 g/L). Compared with the AO method, EAQ efficiency is significantly elevated by 10−20 times in this continuous flow photocatalysis strategy.

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Section: Resultsmentioning

confidence: 99%

Sustainable and Continuous Flow Preparation of High-Concentration H₂O₂ by Visible-Light-Activated Molecular Oxygen Oxidation of Lower Alcohols

Yu,

Zhao,

et al. 2023

ACS Sustainable Chem. Eng.

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“…For these reasons, novel means of generating singlet oxygen are continuously reported with applications involving photosensitization by an organic chromophore being highly attractive especially those based on white light or ambient light radiation, where a local power source is not required. While several chromophores have been proposed as 1 O 2 photosensitizers including porphyrins [ 11 ], fullerenes [ 12 ] and conjugated polymers [ 13 ], these often suffer from deactivation processes, especially photobleaching [ 14 ]. These disadvantages can be partly or wholly overcome through incorporation of the chromophore into extended porous structures such as metal organic frameworks (MOFs) [ 15 , 16 ], covalent organic frameworks (COFs) [ 17 ] or porous organic polymers (POPs) [ 18 ], where chromophore bleaching is arrested but 1 O 2 is able to emanate from the material at its surfaces or pores.…”

Section: Introductionmentioning

confidence: 99%

Mild selective photochemical oxidation of an organic sulfide using OxP-polyimide porous polymers as singlet oxygen generators

Hynek,

Payne,

Shrestha

et al. 2024

Science and Technology of Advanced Materials

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A series of porous organic polymers based on a singlet oxygen generating oxoporphyinogen (‘ OxP ’) has been successfully prepared from a pseudotetrahedral OxP -tetraamine precursor ( OxP(4-NH 2 Bn) 4 ) by its reaction with tetracarboxylic acid dianhydrides under suitable conditions. Of the compounds studied, those containing naphthalene ( OxP-N ) and perylene ( OxP-P ) spacers, respectively, have large surface areas (~530 m 2 g −1 ). On the other hand, the derivative with a simple benzene spacer ( OxP-B ) exhibits the best 1 O 2 generating capability. Although the starting OxP -tetraamine precursor is a poor 1 O 2 generator, its incorporation into OxP POPs leads to a significant enhancement of 1 O 2 productivity, which is largely due to the transformation of NH 2 groups to electron-withdrawing diimides. Overall 1 O 2 production efficacy of OxP-POP s under irradiation by visible light is significantly improved over the common reference material PCN-222 . All the materials OxP-B , OxP-N and OxP-P promote oxidation of thioanisole involving conversion of ambient triplet state oxygen to singlet oxygen under visible light irradiation and its reaction with the sulfide. Although the reaction rate of the oxidation promoted by OxP POPs is generally lower than for conventional materials (such as PCN-222 ) or previously studied OxP derivatives, undesired overoxidation of the substrate to methyl phenyl sulfone is suppressed. For organic sulfides, selectivity of oxidation is especially important for detoxification of mustard gas (bis(2-chloroethyl)sulfide) or similarly toxic compounds since controlled oxidation leads to the low toxicity bis(2-chloroethyl)sulfoxide while overoxidation leads to intoxification (since bis(2-chloroethyl)sulfone presents greater toxicity to humans than the sulfide substrate). Therefore, OxP POPs capable of promoting selective oxidation of sulfides to sulfoxides have excellent potential to be used as mild and selective detoxification agents.

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“…The wide group of these antimicrobial agents can be divided into organic (antibiotics, e.g., [17], quaternary ammonium salts [18][19][20], light-activated singlet oxygen generators [21,22], N-halamines [23]), and inorganic factors (halogens as well as heavy metals and their salts) [12,16]. Among various inorganic bactericides of medical importance, zinc is gaining more and more attention (over 5600 documents on the antibacterial activity of zinc and compounds and over 3000 on zinc oxide abstracted by Scopus) [24,25].…”

Section: Introductionmentioning

confidence: 99%

Preparation of Cotton–Zinc Composites by Magnetron Sputtering Metallization and Evaluation of their Antimicrobial Properties and Cytotoxicity

et al. 2022

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The aim of this investigation was to evaluate the biological properties of cotton–zinc composites. A coating of zinc (Zn) on a cotton fabric was successfully obtained by a DC magnetron sputtering system using a metallic Zn target (99.9%). The new composite was characterized using scanning electron microscopy/energy-dispersive X-ray spectroscopy (SEM/EDS), UV/Vis transmittance, and atomic absorption spectrometry with flame excitation (FAAS). The composite was tested for microbial activity against colonies of Gram-positive (Staphylococcus aureus) and Gram-negative (Escherichia coli) bacteria and antifungal activity against Aspergillus niger and Chaetomium globosum fungal mold species as model microorganisms. Cytotoxicity screening of the tested modified material was carried out on BALB/3T3 clone mouse fibroblasts. The SEM/EDS and FAAS tests showed good uniformity of zinc content on a large surface of the composite. The conducted research showed the possibility of using the magnetron sputtering technique as a zero-waste method for producing antimicrobial textile composites.

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New Approach in the Application of Conjugated Polymers: The Light-Activated Source of Versatile Singlet Oxygen Molecule

Cited by 8 publications

References 150 publications

Sustainable and Continuous Flow Preparation of High-Concentration H₂O₂ by Visible-Light-Activated Molecular Oxygen Oxidation of Lower Alcohols

Sustainable and Continuous Flow Preparation of High-Concentration H₂O₂ by Visible-Light-Activated Molecular Oxygen Oxidation of Lower Alcohols

Mild selective photochemical oxidation of an organic sulfide using OxP-polyimide porous polymers as singlet oxygen generators

Preparation of Cotton–Zinc Composites by Magnetron Sputtering Metallization and Evaluation of their Antimicrobial Properties and Cytotoxicity

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New Approach in the Application of Conjugated Polymers: The Light-Activated Source of Versatile Singlet Oxygen Molecule

Cited by 8 publications

References 150 publications

Sustainable and Continuous Flow Preparation of High-Concentration H2O2 by Visible-Light-Activated Molecular Oxygen Oxidation of Lower Alcohols

Sustainable and Continuous Flow Preparation of High-Concentration H2O2 by Visible-Light-Activated Molecular Oxygen Oxidation of Lower Alcohols

Mild selective photochemical oxidation of an organic sulfide using OxP-polyimide porous polymers as singlet oxygen generators

Preparation of Cotton–Zinc Composites by Magnetron Sputtering Metallization and Evaluation of their Antimicrobial Properties and Cytotoxicity

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Product

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About

Sustainable and Continuous Flow Preparation of High-Concentration H₂O₂ by Visible-Light-Activated Molecular Oxygen Oxidation of Lower Alcohols

Sustainable and Continuous Flow Preparation of High-Concentration H₂O₂ by Visible-Light-Activated Molecular Oxygen Oxidation of Lower Alcohols