Collision-induced dissociation of positive and negative copper oxide cluster ions generated by direct laser desorption/ionization of copper oxide

Gord, James R.; Bemish, Raymond J.; Freiser, Ben S.

doi:10.1016/0168-1176(90)80055-8

Cited by 32 publications

(37 citation statements)

References 61 publications

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“…The results obtained for CuO in both the positive and negative ion modes using LA are consistent with previous time-of-flight laser microprobe mass spectrometry (ToF-LMMS) 15,33,50 or LA-FTICRMS 28,33,51 experiments. Mass spectra have been reported in a previous paper.…”

Section: Cuosupporting

confidence: 91%

“…This is consistent with previous studies. 28,51 An odd-even alternation is also observed, but it is less pronounced than in the positive ion detection mode. Moreover, highly reduced anions having a high Cu/O ratio are observed.…”

Section: Cuomentioning

confidence: 83%

“…The stability of a cluster ion in the gas phase depends on two parameters, firstly its electronic configuration (species with a closed valence shell are more stable than species with an open valence shell) 42,50,51 and secondly its 3D structure. It is often reported that compact and symmetric structures such as, for example, C 60 , 58 -60 Ti 8 C 12 , or Ti 14 C 13 , 61 are particularly stable.…”

Section: Influence Of Ion Stabilitymentioning

confidence: 99%

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Laser ablation and secondary ion mass spectrometry of inorganic transition‐metal compounds. Part I: comparison between static ToF‐SIMS and LA‐FTICRMS

Aubriet¹,

Poleunis²,

Müller³

et al. 2006

J. Mass Spectrom.

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Most of the first-row transition-metal oxides, M(A)O(B) (M = Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn) were examined by static secondary ion mass spectrometry (s-SIMS) and laser ablation/ionization Fourier transform ion cyclotron resonance mass spectrometry (LA-FTICRMS). Positive and negative ions show strong correlation between the studied oxide and the detected cluster ions. Specific M(x)O(y) (+/-) species were systematically observed with both MS techniques for each investigated M(A)O(B) transition-metal oxide. Moreover, the ion composition and ion distribution are greatly dependent on the ionization technique. Laser ablation (LA)/ionization leads to larger cluster ions (ionic species with nearly hundred atoms were in particular detected for Sc2O3 and Y2O3 oxides), whereas hydrogenated, dihydrogenated, and sometimes trihydrogenated species were observed in s-SIMS. However, the ion distribution for a given M(x)O(y) (+/-) ion series (i.e. ions including the same number of metal atoms M) generally presented important similarities in both techniques.Finally, it was demonstrated that the chemical state of metal atoms in the observed ionic species is closely dependent on the metal electronic valence shell. High valence states (+III, +IV, +V, and +VI) are favored for metals with a less-than-half full valence shell configuration, whereas for other first-row transition metals (manganese, iron, cobalt, nickel, copper and zinc) lower metal valence states (0, +I or, +II) are involved.

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Section: Cuosupporting

confidence: 91%

Section: Cuomentioning

confidence: 83%

Section: Influence Of Ion Stabilitymentioning

confidence: 99%

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Laser ablation and secondary ion mass spectrometry of inorganic transition‐metal compounds. Part I: comparison between static ToF‐SIMS and LA‐FTICRMS

Aubriet¹,

Poleunis²,

Müller³

et al. 2006

J. Mass Spectrom.

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“…The selected ions are subsequently accelerated and allowed to collide with neutral reagent gas atoms or molecules that can cause fragmentation of the excited ions. CID experiments may, therefore, provide information with regard to bond dissociation energies and ion stabilities [5,6]. The ejection-acceleration process can be repeated several times, resulting in the so-called consecutive or tandem CID experiments [4].…”

Section: Introductionmentioning

confidence: 99%

Determination of bond dissociation energies using mass spectrometry

El-Nakat

Ghanem

Yammine

et al. 2006

Int J of Quantum Chemistry

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ABSTRACT:Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR/ MS) offers the opportunity for gas phase cluster formation reactions at very low pressures and at temperatures that are different from room temperature. Reactions take place with single positive-charge metal ions that are normally ϩ2, ϩ3, ϩ4, etc., charged in solution. The ions formed are detected by measuring the current induced by their cyclotron rotation, but they cannot be physically separated and collected. Collisioninduced dissociation (CID) is widely used for ion-structure determination via the fragmentation of the excited ions. CID study aims to determine the relationship between the V pp [peak-to-peak voltage of the radiofrequency (rf) pulse] and the massto-charge (m/z) ratio, which will be used for the calculation of the center-of-mass translational kinetic energy (Ek cm ) of the excited ion under investigation. CID studies are restricted to stable ions with relatively high abundance. Nevertheless, with the evolution of computational chemistry, such problems can be overcome whereby CID calculations will be used to provide the substantial parameters for computer software, such as the Gaussian 03 program, for the structure determination of the less stable Ni x S y Ϫ anions. The latter constitutes the core for our current research.

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“…The method of LDI, where no matrix is necessary, can be used successfully to generate gas-phase clusters, which, then can be immediately characterised using mass spectrometry [2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Phenylcopper(I) clusters in the gas phase obtained by laser desorption/ionization from bis(dibenzoylmethane)copper(II)

et al. 2010

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It has been demonstrated that phenylcopper(I)-containing clusters are generated in the gas phase from bis(dibenzoylmethane) copper(II) (Cu(dbm)2) by laser desorption/ ionization (LDI) method. For example, the [Cu5dbm2(C6H5)2]+ ion can be considered as consisting of two Cudbm molecules, two CuC6H5 molecules and a Cu+ cation. The [Cu5(C6H5)4]+ ion can be considered as phenylcopper(I) cluster (consisting of four phenylcopper molecules) ionized by additional Cu+ cation. Results from MS/MS (tandem mass spectrometry) experiments have confirmed the presence of phenylcopper molecules in the analyzed clusters. Ease of preparation of dibenzoylmethane-metal complexes and straightforward method to obtain LDI mass spectra offer a wide range of possibilities to study similar organometallic clusters in the gas phase.

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Collision-induced dissociation of positive and negative copper oxide cluster ions generated by direct laser desorption/ionization of copper oxide

Cited by 32 publications

References 61 publications

Laser ablation and secondary ion mass spectrometry of inorganic transition‐metal compounds. Part I: comparison between static ToF‐SIMS and LA‐FTICRMS

Laser ablation and secondary ion mass spectrometry of inorganic transition‐metal compounds. Part I: comparison between static ToF‐SIMS and LA‐FTICRMS

Determination of bond dissociation energies using mass spectrometry

Phenylcopper(I) clusters in the gas phase obtained by laser desorption/ionization from bis(dibenzoylmethane)copper(II)

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