Ionization of 4,4'-bis(phenylethynyl) anthracene by electron impact.
Ionization of a 4,4'-bis(phenylethynyl)anthracene (C(30)H(18), BPEA) molecule is studied for the first time at different energies of bombarding electrons in crossed electron and molecular beams. The relative cross-section of single ionization of a BPEA molecule in the energy range of 5-55 eV is measured. The ionization potential, E(I) = 7.62 +/- 0.2 eV, is determined using the threshold region of C(30)H(18)(+) ion yield energy dependence. A scheme of the BPEA molecule fragmentation is proposed. Experimental results are in reasonable accordance with calculations made in the framework of the density functional theory.
Kukhta
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B.I. Stepanov Institute of Physics, National Academy of Sciences of Belarus, Nezalezhnastsi Ave. 68, 220072 Minsk, Belarus. kukhta@imaph.bas-net.by
Kukhta
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Zavilopulo
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Agafonova
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Shpenik
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