[MPy]+ and [MxPy]- Clusters Generated by Laser Ablation and Investigated by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

P. F. Greenwood, I. G. Dance, K. J. Fisher, G. D. Willett

Research output: Contribution to journalArticle

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Abstract

Laser (1064 nm) ablation of pressed mixtures of red phosphorus with powders of the metals cobalt or nickel generates positive ions [MPy]+ (y = 2,4,6,8) and negative ions [MxPy]-, monitored by Fourier transform ion cyclotron resonance (FTICR) mass spectrometry. At least 110 negative ions have been identified, more for Co than for Ni. The ions [MxPy]- are distributed through the range 2 ≤ x ≤ 16, 4 ≤ y ≤ 17, with [CoxP8]- (x = 2, 3, 4, 5), [CoxP10]- (x = 5, 6, 7), [NixP6]- (x = 4, 5, 7, 8), and [NixP8]- (x = 2, 3, 4, 6, 7) as more abundant ions. The best negative ion spectra are obtained with 10:1 M/P mixtures, and high laser powers. The preponderance of even numbers of P atoms suggests that P2 units are bound to the metals, and this is supported by the collisional dissociation of [MPy]+ ions (M = Co and Ni, y = 2, 4, 6) where loss of P2 is the major pathway. For both [CoP8]+ and [NiP8]+ initial loss of P4 is important. The reactions of [MP2]+, [MP4]+ and [MP8]+ with σ-ligands ammonia and methanol, and π-ligands C2H2, C2H4 and C6H6, involve addition and substitution processes.

Original languageEnglish
Pages (from-to)6288-6294
Number of pages7
JournalInorganic Chemistry
Volume37
Issue number24
Publication statusPublished - 1 Dec 1998

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Cyclotron resonance
Laser ablation
cyclotron resonance
laser ablation
Mass spectrometry
Fourier transforms
mass spectroscopy
negative ions
Ions
Negative ions
ions
Metals
Ligands
ligands
High power lasers
Ablation
Cobalt
Nickel
positive ions
Ammonia

Cite this

@article{f46560c84a74423e97d5a8eb110d66fa,
title = "[MPy]+ and [MxPy]- Clusters Generated by Laser Ablation and Investigated by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry",
abstract = "Laser (1064 nm) ablation of pressed mixtures of red phosphorus with powders of the metals cobalt or nickel generates positive ions [MPy]+ (y = 2,4,6,8) and negative ions [MxPy]-, monitored by Fourier transform ion cyclotron resonance (FTICR) mass spectrometry. At least 110 negative ions have been identified, more for Co than for Ni. The ions [MxPy]- are distributed through the range 2 ≤ x ≤ 16, 4 ≤ y ≤ 17, with [CoxP8]- (x = 2, 3, 4, 5), [CoxP10]- (x = 5, 6, 7), [NixP6]- (x = 4, 5, 7, 8), and [NixP8]- (x = 2, 3, 4, 6, 7) as more abundant ions. The best negative ion spectra are obtained with 10:1 M/P mixtures, and high laser powers. The preponderance of even numbers of P atoms suggests that P2 units are bound to the metals, and this is supported by the collisional dissociation of [MPy]+ ions (M = Co and Ni, y = 2, 4, 6) where loss of P2 is the major pathway. For both [CoP8]+ and [NiP8]+ initial loss of P4 is important. The reactions of [MP2]+, [MP4]+ and [MP8]+ with σ-ligands ammonia and methanol, and π-ligands C2H2, C2H4 and C6H6, involve addition and substitution processes.",
author = "Greenwood, {P. F.} and Dance, {I. G.} and Fisher, {K. J.} and Willett, {G. D.}",
year = "1998",
month = "12",
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language = "English",
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[MPy]+ and [MxPy]- Clusters Generated by Laser Ablation and Investigated by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry. / Greenwood, P. F.; Dance, I. G.; Fisher, K. J.; Willett, G. D.

In: Inorganic Chemistry, Vol. 37, No. 24, 01.12.1998, p. 6288-6294.

Research output: Contribution to journalArticle

TY - JOUR

T1 - [MPy]+ and [MxPy]- Clusters Generated by Laser Ablation and Investigated by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry

AU - Greenwood, P. F.

AU - Dance, I. G.

AU - Fisher, K. J.

AU - Willett, G. D.

PY - 1998/12/1

Y1 - 1998/12/1

N2 - Laser (1064 nm) ablation of pressed mixtures of red phosphorus with powders of the metals cobalt or nickel generates positive ions [MPy]+ (y = 2,4,6,8) and negative ions [MxPy]-, monitored by Fourier transform ion cyclotron resonance (FTICR) mass spectrometry. At least 110 negative ions have been identified, more for Co than for Ni. The ions [MxPy]- are distributed through the range 2 ≤ x ≤ 16, 4 ≤ y ≤ 17, with [CoxP8]- (x = 2, 3, 4, 5), [CoxP10]- (x = 5, 6, 7), [NixP6]- (x = 4, 5, 7, 8), and [NixP8]- (x = 2, 3, 4, 6, 7) as more abundant ions. The best negative ion spectra are obtained with 10:1 M/P mixtures, and high laser powers. The preponderance of even numbers of P atoms suggests that P2 units are bound to the metals, and this is supported by the collisional dissociation of [MPy]+ ions (M = Co and Ni, y = 2, 4, 6) where loss of P2 is the major pathway. For both [CoP8]+ and [NiP8]+ initial loss of P4 is important. The reactions of [MP2]+, [MP4]+ and [MP8]+ with σ-ligands ammonia and methanol, and π-ligands C2H2, C2H4 and C6H6, involve addition and substitution processes.

AB - Laser (1064 nm) ablation of pressed mixtures of red phosphorus with powders of the metals cobalt or nickel generates positive ions [MPy]+ (y = 2,4,6,8) and negative ions [MxPy]-, monitored by Fourier transform ion cyclotron resonance (FTICR) mass spectrometry. At least 110 negative ions have been identified, more for Co than for Ni. The ions [MxPy]- are distributed through the range 2 ≤ x ≤ 16, 4 ≤ y ≤ 17, with [CoxP8]- (x = 2, 3, 4, 5), [CoxP10]- (x = 5, 6, 7), [NixP6]- (x = 4, 5, 7, 8), and [NixP8]- (x = 2, 3, 4, 6, 7) as more abundant ions. The best negative ion spectra are obtained with 10:1 M/P mixtures, and high laser powers. The preponderance of even numbers of P atoms suggests that P2 units are bound to the metals, and this is supported by the collisional dissociation of [MPy]+ ions (M = Co and Ni, y = 2, 4, 6) where loss of P2 is the major pathway. For both [CoP8]+ and [NiP8]+ initial loss of P4 is important. The reactions of [MP2]+, [MP4]+ and [MP8]+ with σ-ligands ammonia and methanol, and π-ligands C2H2, C2H4 and C6H6, involve addition and substitution processes.

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