Structure and Dynamics in Metal-Containing Clusters PDF Download
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Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Gas phase clusters were produced composed of a metal ion bound to one or more molecular "ligands" (e.g., water, nitrogen, acetylene, methanol, etc.). These gas phase complexes were studied with mass-selected laser photodissociation spectroscopy and laser photoelectron spectroscopy (ZEKE) . These studies determine the structures and energetics of these clusters and they probe the dynamics of nascent solvation processes. Other metal clusters and metal-organic complexes were produced in the gas phase and evaluated for their potential for isolation in macroscopic quantities. Mass spectrometry and laser photodissociation measurements were employed for metal carbides, metal-C60 complexes and complexes of metal with polyaromatic hydrocarbons. These studies provide detailed experimental data which can be compared to theory to improve the overall understanding of metal-molecular interactions.
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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Book Description
Gas phase clusters were produced composed of a metal ion bound to one or more molecular "ligands" (e.g., water, nitrogen, acetylene, methanol, etc.). These gas phase complexes were studied with mass-selected laser photodissociation spectroscopy and laser photoelectron spectroscopy (ZEKE) . These studies determine the structures and energetics of these clusters and they probe the dynamics of nascent solvation processes. Other metal clusters and metal-organic complexes were produced in the gas phase and evaluated for their potential for isolation in macroscopic quantities. Mass spectrometry and laser photodissociation measurements were employed for metal carbides, metal-C60 complexes and complexes of metal with polyaromatic hydrocarbons. These studies provide detailed experimental data which can be compared to theory to improve the overall understanding of metal-molecular interactions.
Author: L.J. Farrugia
Publisher: Springer Science & Business Media
ISBN: 9401101337
Category : Science
Languages : en
Pages : 365
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Book Description
The analogy between the chemistry of molecular transition metal clusters and the processes of chemisorption and catalysis at metal surfaces (the Cluster Surface analogy) has for a number of years provided an interplay between experimental and theoretical inorganic and physical chemists. This collaborative approach has born fruit in the use of well defined modes of metal-ligand bonding in discrete molecular clusters, models for metal-ligand binding on surfaces. Some of the key topics discussed in The Synergy between Dynamics and Reactivity at Clusters and Surfaces are: (1) Mechanisms of the fluxional behaviour in clusters in the liquid phase and the connections with diffusion processes on extended surfaces. The role of metal-metal bond breaking in diffusion. (2) Analogies in the structure of chemisorbed species and related ligands on metallic clusters. (3) Analogies between benzene surface chemistry on extended metal surfaces and on metal surfaces in molecular cluster compounds with particular reference to structural distortions. (4) The role of mobile precursors for dissociation of chemisorption on extended metals and on clusters. Are there analogies in the ligand attachment during cluster compound synthesis? (5) The role of defect sites on metal surfaces in catalyzing chemical reactions and the connection to the special bonding properties of sites on metal clusters having lowest metal-metal coordination. (6) The size of metal clusters needed to mimic surface phenomena on bulk metal surfaces. Different sites needed for different phenomena.
Author: Karl-Heinz Meiwes-Broer
Publisher: Springer Science & Business Media
ISBN: 3642571697
Category : Science
Languages : en
Pages : 315
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Book Description
Due to the interaction with the contact medium, the properties of clusters may change or even disappear. Thus the physics of cluster-on-surface systems -- the main subject of this book -- is of fundamental importance. The book addresses a wide audience, from the newcomer to the expert. Starting from fundamental concepts of adsorbate-surface interactions, the modification of electronic properties through electron confinement, and concepts of cluster production, it elucidates the distinct properties of the new metallic nanostructures.
Author: James I. Penman
Publisher:
ISBN:
Category : Metal clusters
Languages : en
Pages : 348
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Book Description
Author: Zhixun Luo
Publisher: Springer Nature
ISBN: 9811597049
Category : Science
Languages : en
Pages : 267
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Book Description
This book discusses current techniques and instrumentation for cluster chemistry. It addresses both the experimental and theoretical aspects of gas-phase metal cluster reactivities, especially those pertaining to pollution removal, energetic reactions and corrosion and anticorrosion. These metal cluster systems have attracted enormous interest as they display a completely new class of physical, chemical, electronic, magnetic and catalytic properties. As these properties change with size and composition, it can thus be understood how their nature evolves from atoms to bulk solids. The book offers readers a basic understanding of the structural chemistry and reactivity of metal clusters in both gas-phase and wet chemistry. Further, the lessons they learn here regarding metal cluster chemistry will prepare researchers for the study of condensed phase dynamics that pertain to wet chemical synthesis, soft-landing deposition and cluster assembly.
Author: Pierre Braunstein
Publisher: Wiley-VCH
ISBN:
Category : Science
Languages : en
Pages : 568
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Book Description
Metal cluster chemistry is at the cutting edge between molecular and solid-state chemistry and has therefore had a great impact on the researchers working on organic, coordination, and solid-state chemistry, catalysis, physics, and materials science. The development of new sophisticated synthetic techniques has led to enormous progress in the synthesis of this diverse class of compounds. The number of clusters is growing rapidly, since the possible variations in the metal and ligand sphere are numerous. Modern bonding theories, such as the isolobal principle, have allowed a better understanding of the structures and properties of metal clusters, and thus paved the way for the usage of these versatile materials. Catalysis and nanomaterials are just two of the very promising application-oriented fields. Seventy six contributions, written by world experts in this research field, provide extensive coverage of different aspects of cluster chemistry, ranging from synthesis, structure determination, and dynamics to applications. Up-to-date information, including an impressive collection of structural data and illustrations, extensive coverage of the most important publications of the last decade, and many more features make this three-volume set a complete single-source guide for all researchers working in the area of cluster chemistry.
Author: Nicholas Thomas Wilson
Publisher:
ISBN:
Category : Copper
Languages : en
Pages : 324
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Book Description
Author: Karsten Andrae
Publisher:
ISBN: 9783897003958
Category : Metal clusters
Languages : en
Pages : 106
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Book Description
Clusters occupy the region between atoms and bulk and hence are valuable tools for the understanding of macroscopic properties. A main topic of this work is the time evolution of small and of medium size positively charged sodium clusters. In the sense of a pump- and probe experiment, clusters are exposed to a laser field. After the first pulse, called the pump pulse, another time-shifted probe pulse is sent to the cluster. It is found that the time-evolution of the rms-radius or the quadrupole deformation are accessible with the electronic dipol signal and the amount of emitted electrons. Furthermore spinpolarized clusters are investigated. Moreover we see hints that the bonding type is more covalent than metallic. This has similarities to the trends in (spinsaturated) magnesium clusters where small samples are rather covalent.
Author:
Publisher: Elsevier
ISBN: 0444635025
Category : Technology & Engineering
Languages : en
Pages : 394
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Book Description
Protected Metal Clusters: From Fundamentals to Applications surveys the fundamental concepts and potential applications of atomically precise metal clusters protected by organic ligands. As this class of materials is now emerging as a result of breakthroughs in synthesis and characterization that have taken place over the last few years, the book provides the first reference with a focus on these exciting novel nanomaterials, explaining their formation, and how, and why, they play an important role in the future of molecular electronics, catalysis, sensing, biological imaging, and medical diagnosis and therapy. - Surveys the fundamental concepts and potential applications of atomically precise metal clusters protected by organic ligands. - Provides well-organized, tutorial style chapters that are ideal for teaching and self-study - In-depth descriptions by top scientists in the field - Presents the state-of-the art of protected metal clusters and their future prospects
Author: P.J. Reynolds
Publisher: Elsevier
ISBN: 1483297527
Category : Science
Languages : en
Pages : 422
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Book Description
This book attempts to answer why there is so much interest in clusters. Clusters occur on all length scales, and as a result occur in a variety of fields. Clusters are interesting scientifically, but they also have important consequences technologically. The division of the book into three parts roughly separates the field into small, intermediate, and large-scale clusters. Small clusters are the regime of atomic and molecular physics and chemistry. The intermediate regime is the transitional regime, with its characteristics including the onset of bulk-like behavior, growth and aggregation, and the beginning of materials properties. Large-scale clusters reflect more condensed-matter and materials science aspects and it is in this regime that fractals make their most dramatic appearance. This well-integrated and pedagogical overview of the wide field of clusters in which both theoretical and experimental work is covered, will be of interest not only to students, advanced undergraduates and graduate students, but also to researchers in the various subfields surveyed.
