Metal-metal-bonded zirconium-ruthenium and zirconium-iron complexes

1983 ◽  
Vol 105 (3) ◽  
pp. 665-667 ◽  
Author(s):  
Charles P. Casey ◽  
Richard F. Jordan ◽  
Arnold L. Rheingold
Keyword(s):  
Iron Complexes ◽  
Metal Metal

Vanadium–iron complexes featuring metal–metal multiple bonds

2013 ◽  
Vol 4 (9) ◽  
pp. 3557 ◽  
Author(s):  
Subramaniam Kuppuswamy ◽  
Tamara M. Powers ◽  
Jeremy P. Krogman ◽  
Mark W. Bezpalko ◽  
Bruce M. Foxman ◽  
...  
Keyword(s):  
Iron Complexes ◽  
Multiple Bonds ◽  
Metal Metal ◽  
Vanadium Iron

Metal−Hydride Bond Activation and Metal−Metal Interaction in Dinuclear Iron Complexes with Linking Dinitriles:  A Synthetic, Electrochemical, and Theoretical Study

2002 ◽  
Vol 41 (24) ◽  
pp. 6456-6467 ◽  
Author(s):  
Ana I. F. Venâncio ◽  
Maxim L. Kuznetsov ◽  
M. Fátima C. Guedes da Silva ◽  
Luísa M. D. R. S. Martins ◽  
João J. R. Fraústo da Silva ◽  
...  
Keyword(s):  
Metal Hydride ◽  
Bond Activation ◽  
Theoretical Study ◽  
Iron Complexes ◽  
Metal Interaction ◽  
Dinuclear Iron ◽  
Metal Metal

Competing metal-metal bonding in heterometallic complexes of gold and mercury. Synthesis of contrasting iron-gold-gold-iron and iron-mercury-iron complexes

1992 ◽  
Vol 31 (18) ◽  
pp. 3685-3687 ◽  
Author(s):  
Pierre Braunstein ◽  
Michael Knorr ◽  
Antonio Tiripicchio ◽  
Marisa Tiripicchio Camellini
Keyword(s):  
Iron Complexes ◽  
Heterometallic Complexes ◽  
Metal Bonding ◽  
Metal Metal

ChemInform Abstract: METAL-METAL-BONDED ZIRCONIUM-RUTHENIUM AND ZIRCONIUM-IRON COMPLEXES

1983 ◽  
Vol 14 (21) ◽  
Author(s):  
C. P. CASEY ◽  
R. F. JORDAN ◽  
A. L. RHEINGOLD
Keyword(s):  
Iron Complexes ◽  
Metal Metal

Tuning Metal–Metal Interactions through Reversible Ligand Folding in a Series of Dinuclear Iron Complexes

2019 ◽  
Vol 58 (18) ◽  
pp. 12234-12244 ◽  
Author(s):  
Shaoguang Zhang ◽  
Qiuran Wang ◽  
Laura M. Thierer ◽  
Alexander B. Weberg ◽  
Michael R. Gau ◽  
...  
Keyword(s):  
Iron Complexes ◽  
Metal Interactions ◽  
Dinuclear Iron ◽  
Metal Metal

Quasiperiodic interfaces: HREM observations of grain and phase boundaries

1990 ◽  
Vol 48 (4) ◽  
pp. 332-333
Author(s):  
K. L. Merkle
Keyword(s):  
Atomic Structure ◽  
Direct Determination ◽  
Lattice Parameter ◽  
Atomic Scale ◽  
Misfit Dislocations ◽  
Oxide Systems ◽  
Atomic Structures ◽  
Periodic Arrays ◽  
Parameter Ratio ◽  
Metal Metal

The atomic structures of internal interfaces have recently received considerable attention, not only because of their importance in determining many materials properties, but also because the atomic structure of many interfaces has become accessible to direct atomic-scale observation by modem HREM instruments. In this communication, several interface structures are examined by HREM in terms of their structural periodicities along the interface.It is well known that heterophase boundaries are generally formed by two low-index planes. Often, as is the case in many fcc metal/metal and metal/metal-oxide systems, low energy boundaries form in the cube-on-cube orientation on (111). Since the lattice parameter ratio between the two materials generally is not a rational number, such boundaries are incommensurate. Therefore, even though periodic arrays of misfit dislocations have been observed by TEM techniques for numerous heterophase systems, such interfaces are quasiperiodic on an atomic scale. Interfaces with misfit dislocations are semicoherent, where atomically well-matched regions alternate with regions of misfit. When the misfit is large, misfit localization is often difficult to detect, and direct determination of the atomic structure of the interface from HREM alone, may not be possible.

Metal-Metal Cooperative Bond Activation by Heterobimetallic Alkyl, Aryl, and Acetylide PtII/CuI Complexes

2020 ◽  
Author(s):  
Shubham Deolka ◽  
Orestes Rivada Wheelaghan ◽  
Sandra Aristizábal ◽  
Robert Fayzullin ◽  
Shrinwantu Pal ◽  
...  
Keyword(s):  
Alkyl Group ◽  
Bond Activation ◽  
Bond Cleavage ◽  
Terminal Alkyne ◽  
Alkyl Aryl ◽  
Metal Metal ◽  
The Stability ◽  
Selective Formation ◽  
Organoplatinum Compounds

We report selective formation of heterobimetallic PtII/CuI complexes that demonstrate how facile bond activation processes can be achieved by altering reactivity of common organoplatinum compounds through their interaction with another metal center. The interaction of the Cu center with Pt center and with a Pt-bound alkyl group increases the stability of PtMe2 towards undesired rollover cyclometalation. The presence of the CuI center also enables facile transmetalation from electron-deficient tetraarylborate [B(ArF)4]- anion and mild C-H bond cleavage of a terminal alkyne, which was not observed in the absence of an electrophilic Cu center. The DFT study indicates that the role of Cu center acts as a binding site for alkyne substrate, while activating its terminal C-H bond.

Functional Gradient Transparent Conducting Oxide Nanowire Arrays as Monophasic Schottky-Barrier Free Memristors for Bipolar Linear Switching

2020 ◽  
Author(s):  
Thomas Herzog ◽  
Naomi Weitzel ◽  
Sebastian Polarz
Keyword(s):  
Schottky Barrier ◽  
Data Storage ◽  
Tin Oxide ◽  
Transparent Conducting Oxide ◽  
Electrical Potential ◽  
High Resistance State ◽  
Nanowire Arrays ◽  
Metal Metal ◽  
Resistance State ◽  
Barrier Free

<div><div><div><p>One of the fascinating properties of metal-semiconductor Schottky-barriers, which has been observed for some material combinations, is memristive behavior. Memristors are smart, since they can reversibly switch between a low resistance state and a high resistance state. The devices offer a great potential for advanced computing and data storage, including neuromorphic networks and resistive random-access memory. However, as for many other cases, the presence of a real interface (metal - metal oxide) has numerous disadvantages. The realization of interface-free, respectively Schottky-barrier free memristors is highly desirable. The aim of the current paper is the generation of nanowire arrays with each nanorod possessing the same crystal phase (Rutile) and segments only differing in composition. The electric conductivity is realized by segments made of highly-doped antimony tin oxide (ATO) transitioning into pure tin oxide (TO). Complex nanoarchitectures are presented, which include ATO-TO, ATO-TO-ATO nanowires either with a stepwise distribution of antimony or as a graded functional material. The electrical characterization of the materials reveals that the introduction of memristive properties in such structures is possible. The special features observed in voltage-current (IV) curves are correlated to the behavior of mobile oxygen vacancies (VO..) at different values of applied electrical potential.</p></div></div></div>

ДИНИТРОЗИЛЬНЫЕ КОМПЛЕКСЫ ЖЕЛЕЗА C ТИОЛСОДЕРЖАЩИМИ ЛИГАНДАМИ ПРЕДСТАВЛЕНЫ В ЖИВЫХ ОРГАНИЗМАХ В ОСНОВНОМ ИХ БИЯДЕРНОЙ ФОРМОЙ

2020 ◽  
Vol 65 (6) ◽  
pp. 1142-1153
Author(s):  
В.Д. Микоян ◽  
◽  
Е.Н. Бургова ◽  
Р.Р. Бородулин ◽  
А.Ф. Ванин ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Sodium Nitrite ◽  
Iron Complexes ◽  
Paramagnetic Resonance ◽  
First Case ◽  
Dinitrosyl Iron ◽  
Electron Paramagnetic ◽  
Dinitrosyl Complexes

The number of mononitrosyl iron complexes with diethyldithiocarbamate, formed in the liver of mice in vivo and in vitro after intraperitoneal injection of binuclear dinitrosyl iron complexes with N-acetyl-L-cysteine or glutathione, S-nitrosoglutathione, sodium nitrite or the vasodilating drug Isoket® was assessed by electron paramagnetic resonance (EPR). The number of the said complexes, in contrast to the complexes, formed after nitrite or Isoket administration, the level of which sharply increased after treatment of liver preparations with a strong reducing agent - dithionite, did not change in the presence of dithionite. It was concluded that, in the first case, EPR-detectable mononitrosyl iron complexes with diethyldithiocarbamate in the absence and presence of dithionite appeared as a result of the reaction of NO formed from nitrite with Fe2+-dieth- yldithiocarbamate and Fe3+-diethyldithiocarbamate complexes, respectively. In the second case, mononitrosyl iron complexes with diethyldithiocarbamate appeared as a result of the transition of iron-mononitosyl fragments from ready-made iron-dinitrosyl groups of binuclear dinitrosyl complexes, which is three to four times higher than the content of the mononuclear form of these complexes in the tissue...

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