Stabilization of CCl4− radical anions in glassy matrices at low temperatures

Brickenstein, E.Kh.; Khairutdinov, R. F.

doi:10.1016/0009-2614(85)80674-6

Cited by 13 publications

(2 citation statements)

References 6 publications

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“…6). As was shown by Brickenstein and Khairutdinov (1985) the origin of electron binding to CCI4 depends on the matrix type. For the "solid" matrices with viscosities q at 77 K more than 10" Ps (C2H50H, CH30H, 2-methyltetrahydrofuran) stabilization of CC14 was mainly noted, meanwhile the reactions in "soft" matrices (q < 10'' Ps) (methylcyclohexane, 3-methylpenthane) yield mainly CC13 radicals.…”

Section: Electron Tunneling In the Reaction Of Metalloporphyrin Molecmentioning

confidence: 82%

Long Range Electron Tunneling in Biological and Model Systems

Khairutdinov

Brickenstein

1986

Photochem & Photobiology

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Abstract-This review paper reports the data on the role of long range electron tunneling in photosynthetic and model systems. The main papers concerned with elucidation mechanisms and kinetical peculiarities of electron transfer in reaction centers of bacteria and green plants are considered. The paper reviews the articles on long range electron transfer in reactions of metalloporphyrinssynthetic analogs of the main natural pigment of photosynthesis, chlorophyll. Liquid and solid phase redox reactions of electronically excited porphyrin molecules, intramolecular and photosensitized electron transfer processes are considered.

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Section: Electron Tunneling In the Reaction Of Metalloporphyrin Molecmentioning

confidence: 82%

Long Range Electron Tunneling in Biological and Model Systems

Khairutdinov

Brickenstein

1986

Photochem & Photobiology

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“…Many investigations (spectrometrical and theoretical) have shown that, in principle, halogenated hydrocarbons can form radical anions which decay to form the products in eq 7 ( 61, 62 ). For reduction reactions of polyhalogenated alkanes, radical anion intermediates have been observed by electron paramagnetic resonance ( − ) albeit under very different conditions (either in the gas phase or in solid solutions at 77 K). In aqueous solution, however, pathway II should be strongly favored relative to reactions in the gas phase due to the solvation energy of the anion X - that is formed during the reaction.…”

Section: Resultsmentioning

confidence: 99%

Iron Porphyrin and Mercaptojuglone Mediated Reduction of Polyhalogenated Methanes and Ethanes in Homogeneous Aqueous Solution

Perlinger

Buschmann

Angst

et al. 1998

Environ. Sci. Technol.

104

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Reduction rate constants of seventeen polyhalogenated methanes and ethanes were measured in aqueous solutions containing bulk reductants and the electron-transfer mediators iron porphyrin or juglone (5-hydroxy-1,4naphthoquinone). Rate constants varied 4 orders of magnitude in the case of reaction with iron porphyrin and 7 orders of magnitude in the reaction with mercaptojuglone, an addition product of juglone and hydrogen sulfide. For the iron porphyrin system the results support a reaction mechanism in which one electron is transferred in an outersphere process to the polyhalogenated alkane with bond breakage in the transition state. In the juglone system two competing reaction mechanisms are proposed: an outersphere electron transfer to the polyhalogenated alkane and an S N 2 reaction at the halogen. The kinetic results are directly applicable to environmental systems containing common reductants such as natural organic matter and reduced iron species, providing a "fingerprint" of reactivity for examination of reactive species and rate-limiting steps in those systems.

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Radiation Chemistry

Alfassi¹

2009

Patai's Chemistry of Functional Groups

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Stabilization of CCl4− radical anions in glassy matrices at low temperatures

Cited by 13 publications

References 6 publications

Long Range Electron Tunneling in Biological and Model Systems

Long Range Electron Tunneling in Biological and Model Systems

Iron Porphyrin and Mercaptojuglone Mediated Reduction of Polyhalogenated Methanes and Ethanes in Homogeneous Aqueous Solution

Radiation Chemistry

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