J. Mass Spectrom. Soc. Jpn.

Vol. 58, No. 1, 2010

REVIEW 
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Fundamentals of Mass Spectrometry
ῌChemical Reaction by Core Electron Excitationῌ1῎2
Shin-ichi W6961῎ and Kenichiro T6C6@62
1

 

Department of Physical Science, Graduate School of Science,

Hiroshima University, Higashi-Hiroshima, HIROSHIMA, JAPAN
2

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

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 RIKEN SPring-8, Sayo, Sayo-gun, HYOGO,

JAPANCore electron excitation possesses an attractive potential of inducing selective chemical bond breaking.
Compared to valence excitation, core excitation takes place within a small area because of its spatial localization
and atomic selectivity. Therefore, a speciﬁc atom in a molecule can be excited selectively. The core-excited stateis quite unstable with an extremely high energy, so consecutive decay processesῌAuger decay and ionicdissociationῌcan occur in the vicinity of the excited atom. From this concept, site-selective ionic fragmentation
has been widely and successfully investigated in various core-excited molecular systems. This paper brieﬂy
describes the characteristics of core excitation and experimental methods, and then reviews representative
recent studies about site-selective chemical bond breaking induced by core excitation.
(Received May 25, 2009; Accepted May 25, 2009)

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῎ Correspondence to: Shin-ichi W696, Department of Physical Science, Graduate School of Science, Hiroshima University, 1῍3῍1 Kagamiyama, Higashi-Hiroshima, Hiroshima
739῍8526, JAPAN, e-mail: swada@sci.hiroshima-u.ac.jp
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Fig. 6.

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Keywords: Core electron excitation, Site-selective excitation,
Site-selective chemical bond breaking, Self-assembled monolayer (SAM), Time-of-ﬂight mass spectrometry (TOF-MS)

ῌ 27 ῌ