Formation of H3O+ in the Ionization and Fragmentation of Ethanol Induced by Electron Beam Irradiation

Formation of H3O+ in the Ionization and Fragmentation of Ethanol Induced by Electron Beam Irradiation
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电子束辐照诱导乙醇电离和裂解中 H3O 的形成

DOI:
10.1155/2021/6616439
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发表时间:
2021-01
影响因子:
0.9
通讯作者:
Xueguang Ren
Xueguang Ren
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Chao Ma;Jiaqi Zhou;Enliang Wang;Tao Yang;Zhongfeng Xu;Shaokui Jia;Alex;er Dorn;Xueguang Ren

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<jats:p>低能电子诱导乙醇分子的单次电离和解离(<jats:inline-formula>)
<jats:p>The single ionization and dissociation of ethanol molecules induced by low-energy electrons (<jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1"> <msub> <mrow> <mi>E</mi> </mrow> <mrow> <mn>0</mn> </mrow> </msub> <mo>=</mo> <mn>90</mn> <mtext> </mtext> <mtext>eV</mtext> </math> </jats:inline-formula>) are investigated using multiparticle coincident momentum spectroscopy. By detecting two outgoing electrons (<jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M2"> <msub> <mrow> <mi>e</mi> </mrow> <mrow> <mn>1</mn> </mrow> </msub> </math> </jats:inline-formula> and <jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M3"> <msub> <mrow> <mi>e</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msub> </math> </jats:inline-formula>) and one fragment ion in coincidence, we obtain the energy deposition (<jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M4"> <msub> <mrow> <mi>E</mi> </mrow> <mrow> <mn>0</mn> </mrow> </msub> <mo>−</mo> <msub> <mrow> <mi>E</mi> </mrow> <mrow> <mn>1</mn> </mrow> </msub> <mo>−</mo> <msub> <mrow> <mi>E</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msub> </math> </jats:inline-formula>) during electron ionization of the molecule, i.e., the binding energy spectra, for production of the different ionic fragments C2H5OH+, C2H4OH+, COH+, and H3O+. These data allow us to study the ionization channels for different ionic products. In particular, we focus on H3O+ as a product of double hydrogen migration. It is found that this channel mainly originates from the ionization of outer-valance orbitals (3a<jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M5"> <msup> <mrow /> <mrow> <mo>″</mo> </mrow> </msup> </math> </jats:inline-formula>,10a<jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M6"> <msup> <mrow /> <mrow> <mo>′</mo> </mrow> </msup> </math> </jats:inline-formula>, 2a<jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M7"> <msup> <mrow /> <mrow> <mo>″</mo> </mrow> </msup> </math> </jats:inline-formula>, 9a<jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M8"> <msup> <mrow /> <mrow> <mo>′</mo> </mrow> </msup> </math> </jats:inline-formula>, 8a<jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M9"> <msup> <mrow /> <mrow> <mo>′</mo> </mrow> </msup> </math> </jats:inline-formula>, 1a<jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M10"> <msup> <mrow /> <mrow> <mo>″</mo> </mrow> </msup> </math> </jats:inline-formula>, and 7a<jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M11"> <msup> <mrow /> <mrow> <mo>′</mo> </mrow> </msup> </math> </jats:inline-formula>). Additionally, there are minor contributions from the inner-valence orbitals such as 6a<jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M12"> <msup> <mrow /> <mrow> <mo>′</mo> </mrow> </msup> </math> </jats:inline-formula>, 5a<jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M13"> <msup> <mrow /> <mrow> <mo>′</mo> </mrow> </msup> </math> </jats:inline-formula>, and 4a<jats:inline-formula> <math xmlns="http://www.w3.org/1998/Math/MathML" id="M14"> <msup> <mrow /> <mrow> <mo>′</mo> </mrow> </msup> </math> </jats:inline-formula>. Quantum chemistry calculations show two fragmentation pathways: concerted and sequential processes for formation of H3O+.</jats:p>
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发表时间: 2010-03
期刊: Rapid communications in mass spectrometry : RCM
影响因子: --
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