Intracluster electron transfer and reactions in alkali metal-methacrylate clusters

Hironori Tsunoyama, Keijiro Ohshimo, Fuminori Misaizu, Koichi Ohno

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Size-dependent stability and intracluster reactions have been investigated by photoionization mass spectrometry for alkali metal (M = Li, Na, and K)-methacrylate (CH2=C(CH3)CO2R; R=CH3 and C2H5) clusters. The following two features are commonly observed in the mass spectra of M(CH2=C(CH3)CO2R)n clusters; (1) enhanced ion signal (magic number) at n = 3, and (2) fragment ions with a loss of ROH only for n = 3 and 2. In addition, the magic number behavior at n = 6 is also observed in K system. These features are explained by an intracluster oligomerization and following dissociation reactions. The magic number trimer has a cyclohexane structure as a result of oligomerization, and the two dissociative products also have cyclic structures. The loss of ROH from n = 3 and n = 2 cluster can be attributed to Dieckmann cyclization and lactonization reaction, respectively. From the size-dependent additivity of H2O to M(methacrylate)n clusters, the numbers of methacrylate molecules filling the first solvation shell for Li, Na, and K systems are estimated to be 4, 5, and 6, respectively. From the consideration of the intracluster oligomerization, it is suggested that one and two methacrylate molecules directly bind to the metal atom in Li and Na systems, respectively, in addition to one cyclohexane derivatives. In the K system, two cyclohexanes are suggested to bind directly to the K atom, which is consistent with the observation of the n = 6 magic number.

Original languageEnglish
Pages (from-to)9649-9658
Number of pages10
JournalJournal of Physical Chemistry A
Volume105
Issue number42
DOIs
Publication statusPublished - 2001 Oct 25
Externally publishedYes

Fingerprint

Alkali Metals
Methacrylates
alkali metals
Oligomerization
electron transfer
cyclohexane
Electrons
Cyclohexanes
Ions
Atoms
Photoionization
Molecules
Cyclization
Solvation
trimers
mass spectra
Mass spectrometry
solvation
atoms
photoionization

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

Cite this

Intracluster electron transfer and reactions in alkali metal-methacrylate clusters. / Tsunoyama, Hironori; Ohshimo, Keijiro; Misaizu, Fuminori; Ohno, Koichi.

In: Journal of Physical Chemistry A, Vol. 105, No. 42, 25.10.2001, p. 9649-9658.

Research output: Contribution to journalArticle

Tsunoyama, Hironori ; Ohshimo, Keijiro ; Misaizu, Fuminori ; Ohno, Koichi. / Intracluster electron transfer and reactions in alkali metal-methacrylate clusters. In: Journal of Physical Chemistry A. 2001 ; Vol. 105, No. 42. pp. 9649-9658.
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