Molecular and Free Radical Products of Reactions of Nitrogen Dioxide with Polyvinylpyrrolidone

Davydov, E. Ya.; Pustoshnyi, V. P.; Pariyskii, G. B.; Заиков, Г. Е.

doi:10.1080/00914030008054845

Cited by 2 publications

(2 citation statements)

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“…For this reason, the course of reaction (15) was monitored by following the transformation of the radicals 5 into stable nitroxyl radicals under the action of nitrogen dioxide on the initial and Aerosil-filled (50 mass %) PVP. 93,94 Under these conditions, free-radical transformations of PVP occur according to the following scheme: 95 These reactions result in the formation of two stable nitroxyl radicals, viz., 7 and 8. The EPR spectrum recorded after exposure of PVP in NO 2 represents superimposition of the signals from these radicals (Fig.…”

Section: Effect Of the Filler On The Transformation Kinetics Of Macro...mentioning

confidence: 99%

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Application of radical cage reactions in studies of microstructures of polymers and composites

Davydov¹,

Vorotnikov²,

Pustoshnyi³

et al. 2000

Russ. Chem. Rev.

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Overlayers of a fatty acid (palmitic and lauric acid) formed at the interface between a solution of this molecule in phenyloctane and the basal plane of graphite are studied by in situ scanning tunnelling microscopy. The layers organize into lamellae, which are formed by a close packing arrangement of molecules parallel to the graphite surface. Chemical modification of the STM tips used allowed identification of the functional group. Indeed, the gold tips used are functionalized with 4-mercaptobenzoic acid (4-MBA) and 4-mercaptotoluene (4-MT). The same functional group on a sample is then 'seen' as a dark and a bright spot when imaged with 4-MBA and 4-MT modified tips, respectively. This contrast distinction is related to interactions (or a lack of them) between the carboxyl group on the sample and molecules on the tip, which can facilitate (or hinder) the electron tunnelling.

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Section: Effect Of the Filler On The Transformation Kinetics Of Macro...mentioning

confidence: 99%

“…Figure 8. The EPR spectra of polyvinylpyrrolidone after its irradiation in the presence of NO2 94. (a) Aerosil-free PVP; (b) PVP with 50 mass % of Aerosil.…”

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confidence: 99%