نتایج جستجو برای: transition metals polyanion

تعداد نتایج: 321260  

Journal: :Dalton transactions 2015
Long Zhang Tao Yan Ying-Feng Han F Ekkehardt Hahn Guo-Xin Jin

A series of complexes of novel chelating thione-alkene S(η(2)-C[double bond, length as m-dash]C)S tridentate ligands bound to late transition metals (Ir, Rh, Pd) were isolated and characterised. Counter-anions play an important role in the binding of the alkene moiety to the metals. Different solvents were observed to affect the stability of the rhodium complexes.

2016
Stefania Ferrari Maria Cristina Mozzati Marco Lantieri Gabriele Spina Doretta Capsoni Marcella Bini

Improving cathode materials is mandatory for next-generation Li-ion batteries. Exploring polyanion compounds with high theoretical capacity such as the lithium metal orthosilicates, Li2MSiO4 is of great importance. In particular, mixed silicates represent an advancement with practical applications. Here we present results on a rapid solid state synthesis of mixed Li2(FeMnCo)SiO4 samples in a wi...

2004
Francesco Faglioni William A. Goddard

We determined the binding energy of hydrogen to the closest packed surface for all nine group VIII transition metals as a function of surface coverage using quantum mechanics ~density functional theory with the generalized gradient approximation! with periodic boundary conditions. The study provides a systematic comparison of the most stable surfaces of the nine group VIII transition metals, le...

2010
Ralph G. Nuzzo Sharon L. Haynie Michael E. Wilson George M. Whitesides

Acylation of bis[2-(diphenylphosphino)ethyl]amine provides a flexible synthesis of functionalized chelating diphosphines. This t.uitiott off"rs a route to diphosphine complexes of transition metals having a wide r?n-ge of structures and physical properties and especially to water-soluble complexes. The aqueous solubility of the free ligands and of ttre compleres prepared from them depend on the...

2002

LLE Review, Volume 91 125 Introduction The transition metal–hydrogen systems have been intensively researched for many years because of the various applications of these systems. A large hydrogen solubility in some transition metals allows their use for safe and high-capacity hydrogen storage.1,2 At the other end of the spectrum, hydrogen ingress at low concentrations can induce mechanical degr...

1995
Pushpa Mahalingam Huimin Liu David S. Dandy

This paper presents a brief discussion of the phenomena associated with chemisorption of hydrocarbon species on transition metals during diamond chemical vapor deposition. The concepts relevant to the surface energetics are summarized, and the methods developed for the calculation of surface chemisorption energies are reviewed. Chemisorption energies of methyl radicals on transition metals are ...

Journal: :The Journal of chemical physics 2005
Francesco Faglioni William A Goddard

We determined the binding energy of hydrogen to the closest packed surface for all nine group VIII transition metals as a function of surface coverage using quantum mechanics (density functional theory with the generalized gradient approximation) with periodic boundary conditions. The study provides a systematic comparison of the most stable surfaces of the nine group VIII transition metals, le...

2012
SANGEETA SAHU

Transition metal ion has been receiving a great attention in the recent years, as the high concentration of toxic metal ions. This paper deals with short review and to study the various types of transition metals present in waste water released from Pulp and Paper effluents. These are being constantly poured into the environment, which result in the long lasting bio-hazards in the aquatic eco-s...

Journal: :Neuro endocrinology letters 2006
John G Ionescu Jan Novotny Vera Stejskal Anette Lätsch Eleonore Blaurock-Busch Marita Eisenmann-Klein

OBJECTIVES High levels of transition metals such as iron, nickel, chromium, copper, and lead are closely related to free radical generation, lipid peroxidation, formation of DNA strand breaks, and tumor growth in cellular systems. In order to determine the correlation to malignant growth in humans, we investigated the accumulation of heavy metals in 20 breast cancer biopsies and compared the fi...

Journal: :Journal of The Electrochemical Society 2022

Abstract It is a privilege for me to write the brief perspective on transition of John B. Goodenough from Oxford University Texas at Austin (UT Austin). While most people will tend retire, transitioned UT age 64 in 1986 and has been making phenomenal contributions during past 35 years, with genuine passion science profound impact society large. To highlight few, include following: chemistry phy...

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