Study of Cluster Anions Generated by Laser Ablation of Titanium Oxides: A High Resolution Approach Based on Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

Abstract

FTICR cell confirm this assessment. Tandem mass spectrometry experiments were also performed in sustained off-resonance irradiation collision-induced dissociation (SORI-CID) mode. Three fragmentation pathways were observed: (1) elimination of water molecules, (2) O 2 loss for radical anions, and (3) fission of the cluster. Density functional theory (DFT) calculations were performed to explain the experimental data.

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

“…The results indicate that the titanium oxide cationic clusters lose mainly neutral O 2 , TiO and/or (TiO 2 ) n units. This trend seems to be a general behavior in many dissociation processes as observed also from the experimental studies of other groups [8,21,22]. The charged fragments observed are those that exhibit the lowest ionization potentials.…”

“…), belonging to the (TiO 2 ) + n series are absent in spectra presented in earlier reports [1,2,4]. Among the several mass spectrometric studies published in the literature, (TiO 2 ) n clusters are only reported in the work of Liu et al [3], of Himeno et al [9], for negative cluster ions in the work of Barthen et al [8] and of Matsuda and Bernstein [5]. In the latter case, the ions are produced via postionization of neutrals with 118 nm laser light.…”

“…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.…”

Cation–Cation Interactions in [(UO2)2(OH)n]4–n Complexes

“…A recent ablation study of titanium dioxide solids resulted in the detection of similar oxy-hydroxide anions, [(TiO 2 ) x (H 2 O) y OH] − and [(TiO 2 ) x (H 2 O) y O 2 ] − , after reaction with water and dioxygen. 55 The values of x and y in these species varied from 1 to 25 and 1 to 3, respectively. It can be rationalized that the previously identified uranates could also result in a similar variety of hydroxide and superoxide complexes if they are reacted with water or dioxygen.…”

Matrix‐assisted laser ablation production of gold cluster ions from Au‐coated photonic crystals

“…Investigation of clusters has been a very active field of research because their size falls in a range between a single atom and macroscopic materials, which offer many unique physical and chemical properties and have made the clusters useful in many fields such as biology and sensors . Of the various clusters studied, gold cluster ions (GCIs) have received increasing interest because they can be applied to high efficient catalytic reactions and other fields .…”