The formation of electronically excited fragments by the electron impact of furan and related five-membered heterocycles.

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概要

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• In the wavelength region of 200–600 nm, photoemissions from electronically excited H, CH, C<SUB>2</SUB>, and CS (only from thiophene and tetrahydrothiophene) were observed when furan, tetrahydrofuran, thiophene, and tetrahydrothiophene were excited by electron impact (0–70 eV). Hydrogen atoms (<I>n</I>=4) and CH(A<SUP>2</SUP>Δ) radicals were produced from these five-membered heterocycles <I>via</I> single collision excitations, while CS(A<SUP>1</SUP>Π) radicals from thiophene and tetrahydrothiophene were partly formed in secondary processes. The appearance potentials for the hydrogen Balmer β and the CH(A<SUP>2</SUP>Δ-X<SUP>2</SUP>Π) bands from these five-membered heterocycles are determined, and the dissociation processes forming H(<I>n</I>=4) and CH(A) are discussed.

• 公益社団法人 日本化学会の論文

著者

• Tokue Ikuo

  Department Of Chemistry Faculty Of Science Niigata University

• Ito Yoshio

  Department of Appleed Chemiaity and Bialownology,Facutory of Enginiaring,niigata Institute of Technology

• Ikarashi Masami

  Department of Chemistry, Faculty of Science, Niigata University

• Takizawa Sadachika

  Department of Chemistry, Faculty of Science, Niigata University

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