Generation of singlet oxygen (1O2) from hydrogen peroxide decomposition by in situ generated hypervalent iodoarene reagents

2014 ◽  
Vol 86 (6) ◽  
pp. 945-952 ◽  
Author(s):  
Erbay Kalay ◽  
Hamdullah Kılıç ◽  
Mustafa Catir ◽  
Murat Cakici ◽  
Cavit Kazaz
Keyword(s):  
Hydrogen Peroxide ◽  
Singlet Oxygen ◽  
Molecular Oxygen ◽  
Singlet Molecular Oxygen ◽  
Hydrogen Peroxide Decomposition ◽  
Co Catalyst ◽  
Peroxide Decomposition ◽  
Novel Method

AbstractA novel method for the production of singlet oxygen from H2O2 was developed. A combination of iodoarene (ArI), methyltrioxorhenium (MTO), and H2O2 in the presence of pyridine as the co-catalyst efficiently produced singlet molecular oxygen (1O2) under biphasic conditions. The existence of 1O2 was demonstrated by trapping experiments with aromatic dienes, 1,3-cyclodienes, and alkenes. The mechanism of 1O2 production from the iodoarene/MTO/35 % H2O2 system and the reaction scope was also discussed.

scholarly journals Selective Generation of Singlet Oxygen in Chloride Accelerated Copper Fenton Chemistry

2018 ◽  
Author(s):  
Andrew Carrier ◽  
Collins Nganou ◽  
David Oakley ◽  
Yongli Chen ◽  
Ken Oakes ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Oxygen Sensor ◽  
Kinetic Studies ◽  
Side Reactions ◽  
Fenton Chemistry ◽  
Co Catalyst ◽  
Novel Method ◽  
Selective Generation ◽  
Antimicrobial Treatments

<p>Singlet oxygen (<sup>1</sup>O<sub>2</sub>), a widely used reactive oxygen species (ROS) in industry and biomedical applications, plays a fundamental role throughout nature. We report a novel method to generate <sup>1</sup>O<sub>2</sub>selectively and efficiently through copper-based Fenton chemistry under circumneutral conditions enhanced by chloride as co-catalyst, with reactivity completely different than that observed in classical iron-based Fenton chemistry. The mechanism of its formation was elucidated through the kinetic studies of orthogonally reactive reporter molecules, i.e., singlet oxygen sensor green, 4-hydroxy-2,2,6,6-tetramethylpiperidine, and phenol, and selective ROS quenchers. This method selectively generates <sup>1</sup>O<sub>2</sub><i>in situ</i>neither relying on photosensitization nor resulting in side reactions, and together with the mechanistic understanding of the Cu-Fenton reaction, not only opens new possibilities in many industries, such as organic synthesis and antimicrobial treatments, but also provides insight into Cu and H<sub>2</sub>O<sub>2</sub>containing chemical, environmental, and biological systems.</p>

Design of In Situ Fenton Oxidation Based on the Integration of Experimental and Numerical Modelling

2010 ◽  
Vol 13 (2) ◽  
Author(s):  
Renato Baciocchi ◽  
Cesare Ciotti ◽  
Giacomo Cleriti ◽  
Ivan Innocenti ◽  
Alessandro Nardella
Keyword(s):  
Hydrogen Peroxide ◽  
Numerical Modelling ◽  
Pilot Scale ◽  
Gas Production ◽  
Operating Conditions ◽  
Fenton Oxidation ◽  
Hydrogen Peroxide Decomposition ◽  
Batch Tests ◽  
Peroxide Decomposition

AbstractCriteria for the design of In-Situ Fenton Oxidation (ISFO) is proposed and applied to the development of a pilot-scale treatment of a former refinery site contaminated by hydrocarbons. The proposed criteria takes in account both the regulatory and technical constraints that typically characterize the application of in situ remediation technologies. The proposed design strategy of the ISFO treatment is based on coupling experimental and numerical modelling of the ISFO treatment in an iterative way. Batch tests are performed first, allowing to select the optimal operating conditions and the data on hydrogen peroxide decomposition kinetics. These data, together with the hydro-geological information collected in the field, are then used for the numerical modelling of the ISFO treatment, which allows to define the pilot plant layout and operating conditions and to evaluate the effective delivery of the oxidant and the hydraulic gradient developed in the field. These data are then used to design column scale tests aimed to evaluate the effective hydrogen peroxide longevity, the process performance and the extent of gas production from hydrogen peroxide decomposition.

scholarly journals Intratumoral synthesis of nano-metalchelate for tumor catalytic therapy by ligand field-enhanced coordination

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Bowen Yang ◽  
Heliang Yao ◽  
Han Tian ◽  
Zhiguo Yu ◽  
Yuedong Guo ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Reactive Oxygen Species Generation ◽  
Ligand Field ◽  
Hydrogen Peroxide Decomposition ◽  
Chemical Corrosion ◽  
Oxygen Reduction Reactions ◽  
Peroxide Decomposition ◽  
Cancer Nanomedicine ◽  
Iron Gall

AbstractThe iron gall ink-triggered chemical corrosion of hand-written documents is a big threat to Western cultural heritages, which was demonstrated to result from the iron gall (GA-Fe) chelate-promoted reactive oxygen species generation. Such a phenomenon has inspired us to apply the pro-oxidative mechanism of GA-Fe to anticancer therapy. In this work, we construct a composite cancer nanomedicine by loading gallate into a Fe-engineered mesoporous silica nanocarrier, which can degrade in acidic tumor to release the doped Fe3+ and the loaded gallate, forming GA-Fe nanocomplex in situ. The nanocomplex with a highly reductive ligand field can promote oxygen reduction reactions generating hydrogen peroxide. Moreover, the resultant two-electron oxidation form of GA-Fe is an excellent Fenton-like agent that can catalyze hydrogen peroxide decomposition into hydroxyl radical, finally triggering severe oxidative damage to tumors. Such a therapeutic approach by intratumoral synthesis of GA-Fe nano-metalchelate may be instructive to future anticancer researches.

scholarly journals Kinetics of the Bray-Liebhafsky oscillatory reaction perturbed by polymer supported cobalt catalyst

2011 ◽  
Vol 43 (1) ◽  
pp. 55-62 ◽  
Author(s):  
J.P. Maksimovic ◽  
Z.D. Cupic ◽  
D. Loncarevic ◽  
N. Pejic ◽  
D. Vasiljevic-Radovic ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Kinetic Data ◽  
Cobalt Catalyst ◽  
Batch Reactor ◽  
Oscillatory Reaction ◽  
Hydrogen Peroxide Decomposition ◽  
Co Catalyst ◽  
Peroxide Decomposition ◽  
Polymer Supported ◽  
Kinetics Of

The Bray-Liebhafsky (BL) oscillatory reaction generated in the batch reactor at 62- 68 oC was perturbed by cobalt(II)-nitrate, supported on the macroreticular copolymer of poly-4-vinylpyridine with divinylbenzene (Co-PVPDVB). The kinetic data was analyzed of the complex pathways of the hydrogen peroxide decomposition in the examined BL reaction. The obtained results confirm that the kinetics of the BL reaction in the presence Co-PVPDVB comes partially from the Co-catalyst and partially from the macroreticular copolymer support.

scholarly journals Selective Generation of Singlet Oxygen in Chloride Accelerated Copper Fenton Chemistry

2018 ◽  
Author(s):  
Andrew Carrier ◽  
Collins Nganou ◽  
David Oakley ◽  
Yongli Chen ◽  
Ken Oakes ◽  
...  
Keyword(s):  
Singlet Oxygen ◽  
Oxygen Sensor ◽  
Kinetic Studies ◽  
Side Reactions ◽  
Fenton Chemistry ◽  
Co Catalyst ◽  
Novel Method ◽  
Selective Generation ◽  
Antimicrobial Treatments

<p>Singlet oxygen (<sup>1</sup>O<sub>2</sub>), a widely used reactive oxygen species (ROS) in industry and biomedical applications, plays a fundamental role throughout nature. We report a novel method to generate <sup>1</sup>O<sub>2</sub>selectively and efficiently through copper-based Fenton chemistry under circumneutral conditions enhanced by chloride as co-catalyst, with reactivity completely different than that observed in classical iron-based Fenton chemistry. The mechanism of its formation was elucidated through the kinetic studies of orthogonally reactive reporter molecules, i.e., singlet oxygen sensor green, 4-hydroxy-2,2,6,6-tetramethylpiperidine, and phenol, and selective ROS quenchers. This method selectively generates <sup>1</sup>O<sub>2</sub><i>in situ</i>neither relying on photosensitization nor resulting in side reactions, and together with the mechanistic understanding of the Cu-Fenton reaction, not only opens new possibilities in many industries, such as organic synthesis and antimicrobial treatments, but also provides insight into Cu and H<sub>2</sub>O<sub>2</sub>containing chemical, environmental, and biological systems.</p>

scholarly journals In Situ Strain Evolution on Pt Nanoparticles during Hydrogen Peroxide Decomposition

Nano Letters ◽  
2020 ◽  
Vol 20 (12) ◽  
pp. 8541-8548
Author(s):  
Sungwook Choi ◽  
Myungwoo Chung ◽  
Dongjin Kim ◽  
Sungwon Kim ◽  
Kyuseok Yun ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Pt Nanoparticles ◽  
Hydrogen Peroxide Decomposition ◽  
Strain Evolution ◽  
Peroxide Decomposition

In situ oxidation remediation technologies: Kinetic of hydrogen peroxide decomposition on soil organic matter

2009 ◽  
Vol 170 (2-3) ◽  
pp. 627-632 ◽  
Author(s):  
Arturo Romero ◽  
Aurora Santos ◽  
Fernando Vicente ◽  
Sergio Rodriguez ◽  
A. Lopez Lafuente
Keyword(s):  
Hydrogen Peroxide ◽  
Organic Matter ◽  
Soil Organic Matter ◽  
Hydrogen Peroxide Decomposition ◽  
In Situ Oxidation ◽  
Peroxide Decomposition
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