Journal ArticleDOI
Gas Phase Ion Chemistry of Transition Metal Clusters: Production, Reactivity, and Catalysis
TLDR
A review on the use of mass spectrometry to examine the gas phase ion chemistry of metal clusters is presented in this article, where the chemistry of other bare and ligated metal clusters, including mixed metal dimer ions, is examined.Abstract:
This review focuses on the use of mass spectrometry to examine the gas phase ion chemistry of metal clusters. Ways of forming gas phase clusters are briefly overviewed and then the gas phase chemistry of silver clusters is discussed to illustrate the concepts of “magic numbers” and how reactivity can be size dependent. The chemistry of other bare and ligated metal clusters is examined, including mixed metal dimer ions as models for microalloys. Metal clusters that catalyze gas phase chemical reactions such as the oxidation of CO and organic substrates are reviewed. Finally the interface between nanotechnology and mass spectrometry is also considered.read more
Citations
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Journal ArticleDOI
Atomically Precise Clusters of Noble Metals: Emerging Link between Atoms and Nanoparticles
TL;DR: Luminescence in the visible region, especially by clusters protected with proteins, with a large Stokes shift, has been used for various sensing applications, down to a few tens of molecules/ions, in air and water.
Journal ArticleDOI
Gas-phase catalysis by atomic and cluster metal ions: the ultimate single-site catalysts.
Diethard K. Bohme,Helmut Schwarz +1 more
TL;DR: This Review describes how transfer of oxygen atoms, bond activation, and coupling of fragments can be mediated by atomic or cluster metal ions, and improves the understanding of the intrinsic operation of a practical catalyst at a strictly molecular level.
Journal ArticleDOI
Chemistry with Methane: Concepts Rather than Recipes
TL;DR: Four seemingly simple transformations related to the chemistry of methane are addressed from mechanistic and conceptual points of view: metal-mediated dehydrogenation to form metal carbene complexes, the hydrogen-atom abstraction step in the oxidative dimerization of methane, the mechanisms of the CH(4)→CH(3)OH conversion, and the initial bond scission.
Journal ArticleDOI
Selective activation of alkanes by gas-phase metal ions.
Jana Roithová,Detlef Schröder +1 more
TL;DR: The development and the state-of-art of experimental and theoretical methods for the investigation of model reactions for alkane activation in the gas phase are summarized and the synthesis of HCN is referred to as a reasonably simple example of how large-scale technical processes can be investigated in microscopic models.
Journal ArticleDOI
Thermal hydrogen-atom transfer from methane: the role of radicals and spin states in oxo-cluster chemistry.
TL;DR: The focus of this Minireview concerns the role that the intrinsic properties of gaseous oxo-clusters play to permit HAT reactivity from saturated hydrocarbons at ambient conditions.
References
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Journal ArticleDOI
C 60 : Buckminsterfullerene
Harold W. Kroto,Harold W. Kroto,James R. Heath,Sean C. O'Brien,Robert F. Curl,Richard E. Smalley +5 more
TL;DR: In this article, the authors proposed a truncated icosahedron, a polygon with 60 vertices and 32 faces, 12 of which are pentagonal and 20 hexagonal.
Journal ArticleDOI
Solid C60: a new form of carbon
TL;DR: In this article, a new form of pure, solid carbon has been synthesized consisting of a somewhat disordered hexagonal close packing of soccer-ball-shaped C60 molecules.
Journal ArticleDOI
Onset of Catalytic Activity of Gold Clusters on Titania with the Appearance of Nonmetallic Properties
Mika Valden,X. Lai,D. W. Goodman +2 more
TL;DR: Results suggest that supported clusters, in general, may have unusual catalytic properties as one dimension of the cluster becomes smaller than three atomic spacings.
Journal ArticleDOI
Electronic Shell Structure and Abundances of Sodium Clusters
Walter D. Knight,Keith Clemenger,Walt A. de Heer,Winston A. Saunders,Mei-Yin Chou,Marvin L. Cohen +5 more
TL;DR: In this paper, a mass spectra for sodium clusters of $N$ atoms per cluster, produced in a supersonic expansion with argon carrier gas, is presented. The spectra show large peaks or steps at $N=8, 20, 40, 58, \mathrm{and} 92$.
Journal ArticleDOI
Two-State Reactivity as a New Concept in Organometallic Chemistry§
TL;DR: The present analysis is based on studies of transition metals under idealized conditions, and several recent reports imply that TSR is by no means confined to the gas phase.
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Gas-phase catalysis by atomic and cluster metal ions: the ultimate single-site catalysts.
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