Binary Dioxygen Complexes of Nickel; Infrared Spectroscopic Evidence for Ni(O2) and (O2)Ni(O2) in Low Temperature Matrices

1972 ◽  
Vol 50 (22) ◽  
pp. 3746-3747 ◽  
Author(s):  
H. Huber ◽  
G. A. Ozin
Keyword(s):  
Low Temperature ◽  
Transition Metal ◽  
Nickel Atom ◽  
Isotope Substitution ◽  
Warm Up ◽  
Spectroscopic Evidence ◽  
Variable Concentration ◽  
Diffusion Controlled ◽  
Argon Matrices ◽  
And Diffusion

The cocondensation reaction of nickel atoms with oxygen or dilute oxygen–argon matrices at 4.2–10 °K gives rise to the first examples of binary transition metal dioxygen complexes. Variable concentration and diffusion controlled warm up studies and 16O2, 16O18O, 18O2 isotope substitution studies establish the stoichiometries of the dioxygen complexes of nickel to be Ni(O2) and (O2)Ni(O2). Both complexes have the dioxygen molecule(s) coordinated to the nickel atom in a "sideways" fashion.

"Sideways" Bonded Dinitrogen in Matrix Isolated Cobalt Dinitrogen, CoN2

1973 ◽  
Vol 51 (4) ◽  
pp. 637-640 ◽  
Author(s):  
G. A. Ozin ◽  
A. Vander Voet
Keyword(s):  
Transition Metal ◽  
Metal Atom ◽  
Infrared Spectra ◽  
Transition Metal Atom ◽  
Spectroscopic Evidence ◽  
Isotopic Species ◽  
Argon Matrices

Infrared spectra are reported for matrix isolated cobalt dinitrogen isotopic species, Co14N2, Co14N15N and Co15N2, formed in the cocondensation reaction of atomic cobalt with dilute nitrogen–argon matrices at 10°K. The data provide the first unambiguous spectroscopic evidence for a dinitrogen molecule bonded in a "sideways" fashion to a transition metal atom.

Transition metal sulfide-laminated copper wire for flexible hybrid supercapacitor

2020 ◽  
Vol 44 (42) ◽  
pp. 18489-18495
Author(s):  
Swati J. Patil ◽  
R. B. Pujari ◽  
Tian-Feng Hou ◽  
Dong-Weon Lee
Keyword(s):  
Transition Metal ◽  
Copper Wire ◽  
Metal Sulfide ◽  
Hybrid Supercapacitor ◽  
Metal Sulphide ◽  
Transition Metal Sulfide ◽  
Diffusion Controlled ◽  
And Diffusion ◽  
Dark Blue

The CV profiles of transition metal sulphide electrodes on a Cu-wire (a), and (b) capacitive (light to dark: blue and red) and diffusion-controlled (dark: blue and red) contributions of the hybrid Cu@CoS/NiCo2S4 and Cu@ZnCo2S4 electrodes.

Binary Dioxygen Complexes of Nickel, Palladium, and Platinum, M(O2) and (O2)M(O2), in Low Temperature Matrices

1973 ◽  
Vol 51 (16) ◽  
pp. 2722-2736 ◽  
Author(s):  
H. Huber ◽  
W. Klotzbücher ◽  
G. A. Ozin ◽  
A. Vander Voet
Keyword(s):  
Positive Charge ◽  
Isotopic Substitution ◽  
Normal Coordinate ◽  
Gaseous Oxygen ◽  
Warm Up ◽  
Partial Positive Charge ◽  
Diffusion Controlled ◽  
Bond Stretching ◽  
Bond Strengths ◽  
And Diffusion

The cocondensation reactions of nickel, palladium, and platinum atoms with gaseous oxygen or dilute oxygen–argon mixtures at 4.2–10 °K give rise to binary transition metal dioxygen complexes. Variable concentration and diffusion controlled warm up studies, 16O/18O isotopic substitution studies, normal coordinate and isotope intensity calculations establish the complexes to be of the types M(O2) and (O2)M(O2). Both the mono- and bisdioxygen complexes contain the dioxygen molecules coordinated to the metal atom in a side-on fashion, with a unique D2d "spiro"-type structure favored for the bis-complexes. Frequency and bond stretching force constant trends within the series of complexes are examined and suggest that the O—O and M—O values increase with increasing coordination number, and thus with an increase in partial positive charge on the metal. This trend in O—O stretching frequencies is not in accord with the evaluation of metal–dioxygen bond strengths as based on the degree of reversibility of dioxygen coordination.

LOW-TEMPERATURE TRANSITION METAL-SEMICONDUCTOR IN CdCr2Se4 SINGLE CRYSTALS DOPED WITH INDIUM AND GALLIUM

1980 ◽  
Vol 41 (C5) ◽  
pp. C5-155-C5-156 ◽  
Author(s):  
T. G. Aminov ◽  
K. P. Below ◽  
V. T. Kalinnikov ◽  
L. I. Koroleva ◽  
L. N. Tovmasjan
Keyword(s):  
Low Temperature ◽  
Transition Metal ◽  
Single Crystals ◽  
Temperature Transition

New low-temperature synthesis of transition-metal sulfides

1988 ◽  
Vol 27 (16) ◽  
pp. 2804-2808 ◽  
Author(s):  
Michael J. Martin ◽  
Guo Hua Qiang ◽  
Donald M. Schleich
Keyword(s):  
Low Temperature ◽  
Transition Metal ◽  
Metal Sulfides ◽  
Transition Metal Sulfides ◽  
Low Temperature Synthesis ◽  
Temperature Synthesis

Crystal chemistry of transition metal diarsenates M 2As2O7 (M = Mn, Co, Ni, Zn): variants of the thortveitite structure

2010 ◽  
Vol 66 (6) ◽  
pp. 603-614 ◽  
Author(s):  
Matthias Weil ◽  
Berthold Stöger
Keyword(s):  
Crystal Structure ◽  
Low Temperature ◽  
Transition Metal ◽  
Basic Structure ◽  
Structure Type ◽  
Ambient Conditions ◽  
Modulated Structure ◽  
Triclinic Crystal System ◽  
Space Groups ◽  
Unit Cells

The structures of the 3d divalent transition-metal diarsenates M 2As2O7 (M = Mn, Co, Ni, Zn) can be considered as variants of the monoclinic (C2/m) thortveitite [Sc2Si2O7] structure type with a ≃ 6.7, b ≃ 8.5, c ≃ 4.7 Å, α ≃ 90, β ≃ 102, γ ≃ 90° and Z = 2. Co2As2O7 and Ni2As2O7 are dimorphic. Their high-temperature (β) polymorphs adopt the thortveitite aristotype structure in C2/m, whereas their low-temperature (α) polymorphs are hettotypes and crystallize with larger unit cells in the triclinic crystal system in space groups P\bar 1 and P1, respectively. Mn2As2O7 undergoes no phase transition and likewise adopts the thortveitite structure type in C2/m. Zn2As2O7 has an incommensurately modulated crystal structure [C2/m(α,0,γ)0s] with q = [0.3190 (1), 0, 0.3717 (1)] at ambient conditions and transforms reversibly to a commensurately modulated structure with Z = 12 (I2/c) below 273 K. The Zn phase resembles the structures and phase transitions of Cr2P2O7. Besides descriptions of the low-temperature Co2As2O7, Ni2As2O7 and Zn2As2O7 structures as five-, three- and sixfold superstructures of the thortveitite-type basic structure, the superspace approach can also be applied to descriptions of all the commensurate structures. In addition to the ternary M 2As2O7 phases, the quaternary phase (Ni,Co)2As2O7 was prepared and structurally characterized. In contrast to the previously published crystal structure of the mineral petewilliamsite, which has the same idealized formula and has been described as a 15-fold superstructure of the thortveitite-type basic structure in space group C2, synthetic (Ni,Co)2As2O7 can be considered as a solid solution adopting the α-Ni2As2O7 structure type. Differences of the two structure models for (Ni,Co)2As2O7 are discussed.

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