2021
DOI: 10.1002/bkcs.12220
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Facile Atmospheric Generation of Water Radical Cations via TiO2‐Nanoneedle Arrays for Aromatic Hydrocarbon Detection Based on Corona Discharge

Abstract: Water radical cations, (H2O)n+•, have attracted considerable attention owing to their potential practical applications in analytical chemistry, structural chemistry, radiotherapy, and radiochemistry. Recently, atmospheric pressure chemical ionization has emerged as a versatile method for direct mass spectrometric analysis. Usually, H3O+ is the major proton donor during ionization and only the pseudo molecular ion peaks, instead of molecular ions are detected. In this work, (H2O)2+• ions with high oxidizability… Show more

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Cited by 2 publications
(3 citation statements)
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“…New notable signals emerged at m / z 78, m / z 80, m / z 93, and m / z 94, even up to m / z 110, and m / z 128. According to our previous reports, , the signal at m / z 78 can be attributed to the benzene radical cation C 6 H 6 +• , which is the oxidation product of the electron-transfer reaction between neutral benzene and water dimer radical cations. The assignment of ions at m / z 80, m / z 93, and m / z 94 was confirmed according to MS n (Figure S6).…”
Section: Results and Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…New notable signals emerged at m / z 78, m / z 80, m / z 93, and m / z 94, even up to m / z 110, and m / z 128. According to our previous reports, , the signal at m / z 78 can be attributed to the benzene radical cation C 6 H 6 +• , which is the oxidation product of the electron-transfer reaction between neutral benzene and water dimer radical cations. The assignment of ions at m / z 80, m / z 93, and m / z 94 was confirmed according to MS n (Figure S6).…”
Section: Results and Discussionmentioning
confidence: 99%
“…Furthermore, Figure S3b shows a typical mass spectrum detected through the +2.0 kV corona discharge of dry dinitrogen gas after injecting benzene vapor into the reaction chamber with the capillary voltage and the tube lens voltage set to 0.0 V. The significant increase in the intensity of the signals of benzene radical cations ( m / z 78) and their protonated ions ( m / z 79), simultaneously combined with the remarkable decrease in the intensity of the signals of the water dimer radical cations ( m / z 36), indicated that the ions at m / z 78 and m / z 79 could be attributed to electron and proton transfer reactions between water dimer radical cations and neutral benzene, consistent with our previous report . It was found that the pyridine showed similar relative abundance to that shown in Figure b.…”
Section: Results and Discussionmentioning
confidence: 99%
“…In our previous reports, indirect evidence indicated the co-existence of the proton-transferred and hemi-bonded isomers of the water dimer radical cations in the reactions between (H 2 O) 2 •+ and benzene. Protonated benzene cations ( m/z 79) [ 28 ] and protonated phenol cations ( m/z 95) [ 17 ] could be formed from the [H 3 O + … • OH] isomer or even from their respective dissociation products: H 3 O + or • OH. Alternatively, the abundance of benzene radical cations ( m/z 78) [ 28 ] as well as the phenol radical cations ( m/z 94) could have originated from the [H 2 O⋯OH 2 ] •+ isomer, with the latter case being consistent with the conclusions of Qiu et al [ 15 ].…”
Section: Introductionmentioning
confidence: 99%