Results 221 to 230 of about 288,566 (269)

The structures of transition metal-transition metal alloys

Journal of Solid State Chemistry, 1984
Abstract A structure map using the average electron count and d orbital energy difference as indices is used to sort transition metal alloys of stoichiometry AB . The gross features of the map are mimicked by tight-binding calculations. The inclusion of s orbitals on the metal atoms appear to be important in the determination of alloy structure ...
Jeremy K. Burdett, Timothy J. McLarnan
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The transition metal hexafluorides

Dalton Transactions, 2009
The nine transition metal hexafluorides present a unique series of closely related compounds. Deviations from octahedral structures are influenced by Jahn-Teller effects and spin orbit coupling. The most pronounced chemical behaviour is the increasing electron affinity in the direction WF(6)--> PtF(6) and MoF(6)--> RuF(6), so that with PtF(6) and RuF(6)
Matthias Johann, Molski, Konrad, Seppelt
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Critical size for a metal-nonmetal transition in transition-metal clusters

Physical Review B, 1994
Based on a tight-binding Friedel model for the density of d-electron states, we investigate the critical size for the metal-nonmetal transition in transition-metal clusters. An analytic equation for the critical size has been introduced for the cluster with close-packed structure. At the critical point (about 30--50 atoms), the density of states of the
, Zhao, , Chen, , Wang
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Photocurrent Generation with Transition Metal Nitrides and Transition Metal Carbides

2018 20th International Conference on Transparent Optical Networks (ICTON), 2018
Photoexcited hot carriers in metals can be injected into adjacent semiconductors to collect sub-bandgap photons. In the current work, we experimentally demonstrate that transition metal nitrides and transition metal carbides can act as metals and generate hot electrons by optical illumination similar to metals.
Satoshi Ishii, Satish L. Shinde, Tadaaki Nagao   +2 more
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Density functional theory for transition metals and transition metal chemistry

Physical Chemistry Chemical Physics, 2009
We introduce density functional theory and review recent progress in its application to transition metal chemistry. Topics covered include local, meta, hybrid, hybrid meta, and range-separated functionals, band theory, software, validation tests, and applications to spin states, magnetic exchange coupling, spectra, structure, reactivity, and catalysis,
Christopher J, Cramer, Donald G, Truhlar
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Electronic Transitions in Metals and Insulator-Metal Transitions

1973
In this chapter we take up transitions which change the electrical properties of metals or compounds by establishing a new ground state for the system. Changes in physical rather than chemical properties are involved in these transitions, in contrast to the events discussed in later chapters.
H. G. Drickamer, C. W. Frank
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Transition Metals

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Donald J. Darensbourg, Cesar G. Ortiz
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Adsorption of Transition Metal Atoms on a Transition Metal Substrate

Journal of Vacuum Science and Technology, 1972
The binding energy of transition atoms adsorbed on a transition metal of the same series is studied in a tight binding model using a moment’s expansion technique. The general trends of the variation of the binding energy with the number of adatom d electrons are similar for all the substrates.
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Transition metals

2013
This chapter assesses the d-block elements, which form Groups 3–11 and are collectively often referred to as the transition metals. The common feature of these elements is the presence of a partially filled d sub-shell. It is the presence of this partly filled shell which is responsible for most of the special properties which set the transition metals
James Keeler, Peter Wothers
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Transition metal nitroprussides: Crystal and electronic structure, and related properties

Coordination Chemistry Reviews, 2021
Leslie Reguera, Y Avila, E Reguera
exaly