Разрушение Пептидов И Нуклеозидов В Реакциях С Электронами Низких Энергий

Муфтахов, М.В.; Щукин, П.В.

doi:10.21883/jtf.2018.05.45907.2425

Журнал Технической Физики

2018

DOI: 10.21883/jtf.2018.05.45907.2425

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Разрушение Пептидов И Нуклеозидов В Реакциях С Электронами Низких Энергий

М.В. Муфтахов¹,

П.В. Щукин²

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Cited by 2 publications

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References 19 publications

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“…H 2 O − ions are formed only in ribosides 27. This means that the ОНgroup at the 2′ site is involved in the formation of XC 2 H 2 O − ions,…”

mentioning

confidence: 99%

Resonant electron capture by uridine and deoxyuridine molecules: Fragmentation with charge transfer

Муфтахов

Shchukin

2019

Rapid Comm Mass Spectrometry

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Rationale Charge transfer via DNA plays an important role in physical and chemical processes in biological systems, and is used in biomolecular electronics. The present study considers the resonant interaction of free electrons with nucleosides, which is important for an understanding of the processes of electron transport in DNA. Methods Resonant electron capture negative ion mass spectrometry was used to study the processes of low‐energy electron attachment to two uracil nucleosides, uridine and deoxyuridine, while density functional theory (DFT) calculations were used to analyze the energy aspects of ion formation and decay. Results Short‐lived molecular ions, formed via mechanisms of π* shape resonances, were found in the energy region below 5 eV. The fragmentation channels of these resonances and the structures of the charged and neutral products formed were determined. Conclusions These results suggest that the formation of some fragment negative ions occurs through intramolecular charge transfer.

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“…H 2 O − ions are formed only in ribosides 27. This means that the ОНgroup at the 2′ site is involved in the formation of XC 2 H 2 O − ions,…”

mentioning

confidence: 99%

Resonant electron capture by uridine and deoxyuridine molecules: Fragmentation with charge transfer

Муфтахов

Shchukin

2019

Rapid Comm Mass Spectrometry

View full text Add to dashboard Cite

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Resonant Capture of Electrons by Molecules of Uracile, Cytosene, and Their 5-Methyl- and 5-Hydroxymethyl Derivatives

Muftakhov,

Tuktarov

2023

Russian Journal of Physical Chemistry

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A study is performed of electron-induced reactions with uracil, thymine, 5-hydroxymethyluracil, cytosine, 5-methylcytosine, and 5-hydroxymethylcytosine. The processes responsible for the formation of negative ions in the studied objects are identified. Features of the formation of the mass spectra of hydroxymethyl derivatives are associated with the abstraction and destruction of substituents. The cross sections of [M–H]− ions are determined in the 3 eV range of energies: (1.1–2.6) × 10−18 cm2 for uracils and (3.6–5.0) × 10−19 cm2 for cytosines.

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Разрушение Пептидов И Нуклеозидов В Реакциях С Электронами Низких Энергий

Cited by 2 publications

References 19 publications

Resonant electron capture by uridine and deoxyuridine molecules: Fragmentation with charge transfer

Resonant electron capture by uridine and deoxyuridine molecules: Fragmentation with charge transfer

Resonant Capture of Electrons by Molecules of Uracile, Cytosene, and Their 5-Methyl- and 5-Hydroxymethyl Derivatives

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