Photofragmentation of mass-selected titanium oxide cluster cations

Jadraque, María; Sierra, Borja; Sfounis, A; Velegrakis, Michalis

doi:10.1007/s00340-009-3874-4

Cited by 11 publications

(19 citation statements)

References 20 publications

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“…The intensity peaks of Ti x O + y clusters in the spectrum are labeled as x, y ranging from 1,1 to 12,23. The clusters produced are similar to those observed previously in our laboratory [6,7]. Based on previous studies from our group [6,7] and others [1] the stable clusters observed can be described by the general formula (TiO) m (TiO 2 ) n (O 2 ) + k (with m, n = 0, 1, 2, .…”

Section: Resultssupporting

confidence: 73%

“…The formation of cluster ions using the molecular beam apparatus in our laboratory has previously been described in detail [6,7,14,15]. Briefly, Ti x O + y clusters are produced in a first vacuum chamber where a rotating titanium target is placed just in front of an oxygen (O 2 ) gas pulsed nozzle (5 bar backing pressure) and is irradiated by a pulsed laser (Nd:YAG second harmonic at 532 nm, 6 ns pulse width, 10 Hz repetition rate, 1 J/cm 2 fluence).…”

Section: Methodsmentioning

confidence: 99%

“…In this paper we present results from CID experiments of mass selected Ti x O + y clusters using krypton gas as collision partner. Our work focuses on the composition and the fragmentation of Ti x O + y clusters with sizes up to x = 4 and y = 9 and extend our previous studies based on photofragmentation [6,7], thus giving a more extensive investigation of these species. Furthermore, we used the CID results to determine the fragmentation cross section of the clusters.…”

Section: Introductionmentioning

confidence: 98%

“…These studies mainly focus on generating and analyzing the nature and the relative abundances of Ti x O + y clusters in order to assess their formation mechanism, stability and properties under different experimental conditions. Some of these studies contain extended investigations on the photoionization [5] and also the photofragmentation [6,7] of these clusters. The technique of collision-induced dissociation (CID) has been proven to be a powerful tool for obtaining information about the stability, the bonding, and the structure of ionic species.…”

Section: Introductionmentioning

confidence: 99%

“…Numerous experimental studies have been devoted to the study of gas-phase titanium oxide Ti x O + y clusters by means of laser ablation mass spectrometry [1][2][3][4][5][6][7][8][9]. These studies mainly focus on generating and analyzing the nature and the relative abundances of Ti x O + y clusters in order to assess their formation mechanism, stability and properties under different experimental conditions.…”

Section: Introductionmentioning

confidence: 99%

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Collision-induced dissociation studies on gas-phase titanium oxide cluster cations

2012

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Titanium oxide cluster cations Ti x O + y are produced in a molecular beam by combining laser ablation of titanium with the supersonic expansion of oxygen into vacuum. The size distribution of the clusters produced is analyzed by time-of-flight reflectron mass spectrometry. The stable clusters appearing in the mass spectrum can be described by the general formula (TiO) m (TiO 2 ) n (O 2 ) + k (with m, n = 0, 1, 2, . . . and k = 0, 1). Additionally, collisioninduced dissociation studies of mass selected clusters colliding with Kr atoms in a gas cell have been performed. The results show that the clusters lose neutral O 2 , TiO and/or (TiO 2 ) n units, and the remaining charged fragments are those with the lowest ionization potentials. From these results the fragmentation cross section of the selected clusters is obtained.

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