Time-resolved ESR studies on transient radicals photogenerated in solutions of melamine in ethylene glycol

Konkin, A. A.; Roth, H.-K.; Schroedner, M.; Штырлин, В. Г.; Garipov, Ruslan; Ida, Tetsuo; Raetzsch, M. T.; Аганов, А. В.; Nazmutdinova, G. A.

doi:10.1016/j.chemphys.2005.11.020

Cited by 4 publications

(1 citation statement)

References 22 publications

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“…The CIDEP signal can be divided into two groups as shown by the stick spectrum. One is the six double lines with EPR parameters g = 2.0030, a HðaÞ ¼ 1:75mT, a 2Hðb;CH 2 Þ ¼ 0:99mT and a Hðb;OHÞ ¼ 0:1mT, which can be assigned to EG ketyl radical CH 2 C H OH ð Þ 2 [31]. The other is the seven broad hyperfine lines with EPR parameters g = 2.0048 and a Hðo;CH 3 Þ ¼ 4:9G, which can be assigned to neutral durosemiquinone radical DQH [32].…”

Section: Resultsmentioning

confidence: 99%

Viscosity effect on the CIDEP of laser photolysis of duroquinone in hydrogen-donor solvents

Jia

Shi

et al. 2010

Res Chem Intermed

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Chemically induced dynamic electron polarization (CIDEP) is one of the important research fields of dynamic spin chemistry. In the present work, with ethylene glycol, 1,2-propanol and their mixtures with different ratios in volume as solvents and duroquinone as photosensitive molecule, the influence of solvent viscosity on the CIDEP of photolyzed duroquinone radicals has been studied experimentally. In each solvent, duroquinone neutral radicals are observed. Duroquinone neutral radicals are generated through hydrogen transfer reaction from hydrogen-donor solvent molecules to excited duroquinone triplet. The CIDEP mechanism is mainly triplet mechanism. The CIDEP intensity of duroquinone neutral radicals decreases with the increase in the solvent viscosity, and the variation was rapid in low-viscosity range and slow in high-viscosity range.

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Section: Resultsmentioning

confidence: 99%

Viscosity effect on the CIDEP of laser photolysis of duroquinone in hydrogen-donor solvents

Jia

Shi

et al. 2010

Res Chem Intermed

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Time-Resolved Electron Paramagnetic Resonance Investigation on the Quenching Reaction of Photo-Induced Excited Triplet Vitamin K₃by Antioxidant Vitamin C in Homogeneous and Micelle Solutions

Wang

Zheng

Bian

et al. 2014

Spectroscopy Letters

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Viscosity Effect Study on Quenching of Photoinduced Excited Triplet Duroquinone by TEMPO

Jia

Shi

et al. 2010

Spectroscopy Letters

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Time-resolved ESR studies on transient radicals photogenerated in solutions of melamine in ethylene glycol

Cited by 4 publications

References 22 publications

Viscosity effect on the CIDEP of laser photolysis of duroquinone in hydrogen-donor solvents

Viscosity effect on the CIDEP of laser photolysis of duroquinone in hydrogen-donor solvents

Time-Resolved Electron Paramagnetic Resonance Investigation on the Quenching Reaction of Photo-Induced Excited Triplet Vitamin K₃by Antioxidant Vitamin C in Homogeneous and Micelle Solutions

Viscosity Effect Study on Quenching of Photoinduced Excited Triplet Duroquinone by TEMPO

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Time-resolved ESR studies on transient radicals photogenerated in solutions of melamine in ethylene glycol

Cited by 4 publications

References 22 publications

Viscosity effect on the CIDEP of laser photolysis of duroquinone in hydrogen-donor solvents

Viscosity effect on the CIDEP of laser photolysis of duroquinone in hydrogen-donor solvents

Time-Resolved Electron Paramagnetic Resonance Investigation on the Quenching Reaction of Photo-Induced Excited Triplet Vitamin K3by Antioxidant Vitamin C in Homogeneous and Micelle Solutions

Viscosity Effect Study on Quenching of Photoinduced Excited Triplet Duroquinone by TEMPO

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Product

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Time-Resolved Electron Paramagnetic Resonance Investigation on the Quenching Reaction of Photo-Induced Excited Triplet Vitamin K₃by Antioxidant Vitamin C in Homogeneous and Micelle Solutions