Ultraviolet laser ionization studies of 1-fluoronaphthalene clusters and density functional theory calculations

doi:10.1088/1674-1056/19/12/123602

Abstract This paper studies supersonic jet-cooled 1-fluoronaphthalene (1FN) clusters by ultraviolet (UV) laser ionization at 281 nm in a time-of-flight mass spectrometer. The (1FN)_n⁺ (n=1–3) series cluster ions are observed where the signal intensity decreases with increasing cluster size. The effects of sample inlet pressures and ionization laser fluxes to mass spectral distribution are measured. Using density functional theory calculations, it obtains a planar geometric structure of 1FN dimer which is combined through two hydrogen bonds. The mass spectra indicate that the intensity of 1FN trimer is much weaker than that of 1FN dimer and this feature is attributed to the fact that the dimer may form the first "shell" in geometric structure while the larger clusters are generated based on this fundamental unit.

Keywords: 1-fluoronaphthalene clusters ultraviolet laser ionization mass spectrum density functional theory calculation

Received: 21 January 2010
Revised: 15 March 2010
Accepted manuscript online:

PACS:	31.15.E-
	33.15.Fm	(Bond strengths, dissociation energies)
	33.80.Eh	(Autoionization, photoionization, and photodetachment)
	36.40.Cg	(Electronic and magnetic properties of clusters)
	36.40.Mr	(Spectroscopy and geometrical structure of clusters)

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Zhang Shu-Dong(张树东), Zhang Hai-Fang(张海芳), and Tzeng Wen-Bi(曾文碧) Ultraviolet laser ionization studies of 1-fluoronaphthalene clusters and density functional theory calculations 2010 Chin. Phys. B 19 123602

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Ultraviolet laser ionization studies of 1-fluoronaphthalene clusters and density functional theory calculations

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