Interaction of small boron cluster ions with HF

Abstract

Articles you may be interested inHighly stable and symmetric boron caged B @ Co 12 @ B 80 core-shell cluster Appl. Phys. Lett. 94, 133102 (2009); 10.1063/1.3111444 Formation of hydrogenated boron clusters in an external quadrupole static attraction ion trap A combined experimental and theoretical study of the reactivity of small boron cluster cations with HF is reported on in this article. Cross sections for the reaction of mass-selected boron ͑B n ϩ , n ϭ2 -14͒ and boron monohydride ͑B n H ϩ , nϭ4, 7, and 10͒ cluster ions with HF are reported for collision energies from 0.1 to 10 eV. The reaction proceeds via a chemically bound intermediate complex, and the major product channels involve elimination of BF or H from the B n HF ϩ intermediate. Both reactivity and product branching depend strongly on cluster size. Reactivity at low energies generally decreases with increasing size, with the appearance of significant bottlenecks to reaction. The effect of adding a hydrogen atom to the reactant clusters was examined for several cluster sizes. In contrast to the boron oxides, hydrogenation of elemental boron cluster ions has little effect on reactivity with HF, suggesting that H does not compete effectively for HF binding sites. The results provide a sensitive test for the accuracy of ab initio calculations on B n ϩ and B n H ϩ and B n F ϩ , and the calculations provide insight into the reaction mechanism and effects of cluster structure on reactivity.

Vibrations in the B4 rhombic structure

“…1 They have been the subject of numerous experimental [2][3][4][5][6][7][8][9] and theoretical [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] investigations. 1 They have been the subject of numerous experimental [2][3][4][5][6][7][8][9] and theoretical [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24]…”

A phase-space-compressing, mass-selecting beamline for hyperthermal, focused ion beam deposition

“…This conclusion is based on our gas-phase scattering studies of metal, semimetal, and metal-oxide cluster ions, using laser ablation, laser vaporization, and sputtering sources. 30,[32][33][34][35][36]38,[40][41][42][43][44][45][46][47]61 In some of those experiments, a high resolution mass spectrometer 62 was used, capable of resolving M n mϩ (m/n nonintegral͒ for clusters containing up to several hundred atoms.…”

“…28,29 We have used a similar approach to collect and thermalize metal cluster ions produced in external sputter and laser ablation sources, generating beams for gas-phase scattering experiments. [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47] More recently, Gerlich and co-workers have used a cryogenic rf trap to cool and study subthermal energy collisions of ions from an external source. 48,49 In the experiments just mentioned, the trap geometry was optimized for cooling the translational and internal energies of the ions.…”

Structural and energetic exploration of a boron‐rich sulfide cluster B6S

“…Boron‐related cluster chemistry is a highly interesting current topic of theoretical and experimental research owing to their intriguing physical and chemical properties 1–7. Numerous pure boron cluster cations have been characterized or generated by the mass spectrum and laser vaporization to explore their chemical reactivity and fragmentation properties 8–14. Very recently, the structural and electronic properties and chemical bonding of a series of pure boron cluster anions have been investigated by using photoelectron spectroscopy in combination with quantum chemical calculations 15–23.…”