New Fragmentation Pathways in K-THF Collisions As Studied by Electron-Transfer Experiments: Negative Ion Formation

Diogo Almeida; F. Ferreira da Silva; Samuel Eden; Gustavo Garcia; P. Limao-Vieira

doi:10.1021/jp407997w

New Fragmentation Pathways in K-THF Collisions As Studied by Electron-Transfer Experiments: Negative Ion Formation

Diogo Almeida, F. Ferreira da Silva, Samuel Eden, Gustavo Garcia, P. Limao-Vieira

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Time-of-flight (TOF) negative ion mass spectra have been obtained in collisions of 20-100 eV neutral potassium atoms with tetrahydrofuran (C4H8O), an analogue for the sugar unit in DNA/RNA. Major enhancements in O- and C2H3O- production were observed compared with earlier dissociative electron attachment (DEA) experiments. In further contrast with DEA, no evidence was observed for dehydrogenated parent anions, and three new fragment anions were detected: CH-, C-2(-), and C2H-. These contrasting results for potassium impact and DEA highlight significant differences in the reaction pathways initiated by the two electron delivery processes.

Original language	English
Pages (from-to)	690-696
Number of pages	7
Journal	Journal of Physical Chemistry A
Volume	118
Issue number	4
DOIs	https://doi.org/10.1021/jp407997w
Publication status	Published - 30 Jan 2014

Keywords

LOW-ENERGY-ELECTRON
PHASE DEOXYRIBOSE ANALOGS
STIMULATED DESORPTION
CROSS-SECTIONS
TETRAHYDROFURAN
DISSOCIATION
SPECTROSCOPY
SCATTERING
POSITRON
ETHERS

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@article{2769f881d93e409caf25a1bc76aaf1a4,

title = "New Fragmentation Pathways in K-THF Collisions As Studied by Electron-Transfer Experiments: Negative Ion Formation",

abstract = "Time-of-flight (TOF) negative ion mass spectra have been obtained in collisions of 20-100 eV neutral potassium atoms with tetrahydrofuran (C4H8O), an analogue for the sugar unit in DNA/RNA. Major enhancements in O- and C2H3O- production were observed compared with earlier dissociative electron attachment (DEA) experiments. In further contrast with DEA, no evidence was observed for dehydrogenated parent anions, and three new fragment anions were detected: CH-, C-2(-), and C2H-. These contrasting results for potassium impact and DEA highlight significant differences in the reaction pathways initiated by the two electron delivery processes.",

keywords = "LOW-ENERGY-ELECTRON , PHASE DEOXYRIBOSE ANALOGS , STIMULATED DESORPTION , CROSS-SECTIONS , TETRAHYDROFURAN , DISSOCIATION , SPECTROSCOPY , SCATTERING , POSITRON , ETHERS",

author = "Diogo Almeida and {Ferreira da Silva}, F. and Samuel Eden and Gustavo Garcia and P. Limao-Vieira",

note = "D.A. and F.F.S. acknowledge the Portuguese Foundation for Science and Technology (FCT-MEC) for postgraduate SFRH/BPD/99261/2013 and postdoctoral grants SFRH/BPD/68979/2010, respectively. We also acknowledge partial funding from the Portuguese research Grants PEst-OE/FIS/UI0068/2011 and PTDC/FIS-ATO/1832/2012 through FCT-MEC and from the Spanish Ministerio de Economia y Competitividad (Project No. FIS 2012-31230). S.E. acknowledges the financial support of the British EPSRC (CAF fellowship). P.L.V. acknowledges his visiting Professor position at The Open University, U.K. Some of this work forms part of the EU/ESF COST Actions Nano-IBCT-MP1002.",

year = "2014",

month = jan,

day = "30",

doi = "10.1021/jp407997w",

language = "English",

volume = "118",

pages = "690--696",

journal = "Journal Of Physical Chemistry A",

issn = "1089-5639",

publisher = "American Chemical Society",

number = "4",

}

TY - JOUR

T1 - New Fragmentation Pathways in K-THF Collisions As Studied by Electron-Transfer Experiments

T2 - Negative Ion Formation

AU - Almeida, Diogo

AU - Ferreira da Silva, F.

AU - Eden, Samuel

AU - Garcia, Gustavo

AU - Limao-Vieira, P.

N1 - D.A. and F.F.S. acknowledge the Portuguese Foundation for Science and Technology (FCT-MEC) for postgraduate SFRH/BPD/99261/2013 and postdoctoral grants SFRH/BPD/68979/2010, respectively. We also acknowledge partial funding from the Portuguese research Grants PEst-OE/FIS/UI0068/2011 and PTDC/FIS-ATO/1832/2012 through FCT-MEC and from the Spanish Ministerio de Economia y Competitividad (Project No. FIS 2012-31230). S.E. acknowledges the financial support of the British EPSRC (CAF fellowship). P.L.V. acknowledges his visiting Professor position at The Open University, U.K. Some of this work forms part of the EU/ESF COST Actions Nano-IBCT-MP1002.

PY - 2014/1/30

Y1 - 2014/1/30

N2 - Time-of-flight (TOF) negative ion mass spectra have been obtained in collisions of 20-100 eV neutral potassium atoms with tetrahydrofuran (C4H8O), an analogue for the sugar unit in DNA/RNA. Major enhancements in O- and C2H3O- production were observed compared with earlier dissociative electron attachment (DEA) experiments. In further contrast with DEA, no evidence was observed for dehydrogenated parent anions, and three new fragment anions were detected: CH-, C-2(-), and C2H-. These contrasting results for potassium impact and DEA highlight significant differences in the reaction pathways initiated by the two electron delivery processes.

AB - Time-of-flight (TOF) negative ion mass spectra have been obtained in collisions of 20-100 eV neutral potassium atoms with tetrahydrofuran (C4H8O), an analogue for the sugar unit in DNA/RNA. Major enhancements in O- and C2H3O- production were observed compared with earlier dissociative electron attachment (DEA) experiments. In further contrast with DEA, no evidence was observed for dehydrogenated parent anions, and three new fragment anions were detected: CH-, C-2(-), and C2H-. These contrasting results for potassium impact and DEA highlight significant differences in the reaction pathways initiated by the two electron delivery processes.

KW - LOW-ENERGY-ELECTRON

KW - PHASE DEOXYRIBOSE ANALOGS

KW - STIMULATED DESORPTION

KW - CROSS-SECTIONS

KW - TETRAHYDROFURAN

KW - DISSOCIATION

KW - SPECTROSCOPY

KW - SCATTERING

KW - POSITRON

KW - ETHERS

U2 - 10.1021/jp407997w

DO - 10.1021/jp407997w

M3 - Article

C2 - 24400742

VL - 118

SP - 690

EP - 696

JO - Journal Of Physical Chemistry A

JF - Journal Of Physical Chemistry A

SN - 1089-5639

IS - 4

ER -