A diarylethene annulated isomer as a highly-conductive molecular wire evaluated by the exchange interaction between two nitroxides

2020 ◽  
Vol 56 (16) ◽  
pp. 2447-2450
Author(s):  
Youki Sumiya ◽  
Kenji Higashiguchi ◽  
Kenji Matsuda
Keyword(s):  
Exchange Interaction ◽  
Molecular Wire ◽  
Strong Exchange ◽  
Strong Exchange Interaction ◽  
Imino Nitroxide

Bis(imino nitroxide) bridged by a diarylethene annulated isomer was found to show a strong exchange interaction, suggesting the use of the annulated isomer as a highly-conductive molecular wire.

scholarly journals Hydrodynamic theory of magnets with strong exchange interaction

1997 ◽  
Vol 23 (7) ◽  
pp. 522-533 ◽  
Author(s):  
A. A. Isayev ◽  
M. Yu. Kovalevsky ◽  
S. V. Peletminsky
Keyword(s):  
Exchange Interaction ◽  
Hydrodynamic Theory ◽  
Strong Exchange ◽  
Strong Exchange Interaction

Paramagnetic resonance in palladium and platinum group compounds

1953 ◽  
Vol 219 (1139) ◽  
pp. 526-542 ◽  
Keyword(s):  
Magnetic Properties ◽  
Exchange Interaction ◽  
Hyperfine Structure ◽  
Resonance Method ◽  
Paramagnetic Resonance ◽  
Strong Exchange ◽  
Platinum Group ◽  
Van Vleck ◽  
Strong Exchange Interaction

The paramagnetic resonance method has been applied to investigate the magnetic properties of complexes containing elements of the 4 d and 5 d groups. It is shown that the resonance results, and such information as is available from susceptibility measurements, can be accounted for to a good approximation by assuming that there are either covalent σ -bonds or very strong electrostatic bonds in the complex (Van Vleck 1935). In the case of d 5 complexes, however, accurate measurements of the spectroscopic splitting factors show small discrepancies with this theory. Furthermore, an anomalous hyperfine structure is observed for the complex [IrCl 6 ] 2- , which displays lines arising not only from the Ir nucleus, but also from the surrounding Cl nuclei. These effects are ascribed to the presence of weak π -bonds, in addition to σ -bonds, in the complex (Stevens 1953). In magnetically concentrated salts of the 5 d group, it is found that there is strong exchange interaction between paramagnetic neighbours.

Electron Paramagnetic Resonance of Three-Spin Nitroxide−Copper(II)−Nitroxide Clusters Coupled by a Strong Exchange Interaction

2006 ◽  
Vol 110 (7) ◽  
pp. 2315-2317 ◽  
Author(s):  
Matvey V. Fedin ◽  
Sergey L. Veber ◽  
Igor A. Gromov ◽  
Victor I. Ovcharenko ◽  
Renad Z. Sagdeev ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Exchange Interaction ◽  
Paramagnetic Resonance ◽  
Strong Exchange ◽  
Electron Paramagnetic ◽  
Strong Exchange Interaction

Low-dimensional compounds containing cyanido groups. Part XXXV. Structure, spectral, thermal and magnetic properties of a binuclear CuII–biquinoline complex with bridging and terminal dicyanamide ligands

2018 ◽  
Vol 74 (11) ◽  
pp. 1469-1476
Author(s):  
Ivan Potočňák ◽  
Oleksandr Bukrynov ◽  
Katarína Ráczová ◽  
Erik Čižmár ◽  
Svitlana Vitushkina ◽  
...  
Keyword(s):  
Density Functional ◽  
Magnetic Measurements ◽  
Density Functional Theory Calculations ◽  
Crystal Structure Analysis ◽  
Axial Position ◽  
Functional Theory ◽  
Air Atmosphere ◽  
Strong Exchange ◽  
Low Dimensional ◽  
Strong Exchange Interaction

From the system CuCl2–biq–NaN(CN)2 (biq is 2,2′-biquinoline), the binuclear molecular complex bis(μ-dicyanamido-κ2 N 1:N 5)bis[(2,2′-biquinoline-κ2 N,N′)(dicyanamido-κN 1)copper(II)], [Cu2(C2N3)4(C18H12N2)2] or [Cu2(biq)2(dca)2(μ1,5-dca)2] (1) [dca is dicyanamide, N(CN)2 −] was isolated and characterized by crystal structure analysis, and spectral, thermal and magnetic measurements. IR spectroscopy confirmed the presence of the biq and dca ligands in 1. Its solid-state structure consists of discrete centrosymmetric binuclear copper(II) units with double end-to-end dca bridges. Each CuII atom is in a distorted square-pyramidal environment with the equatorial plane formed by two nitrile N atoms from bridging dca groups, one of the two N atoms of the chelate biq molecule and one nitrile N atom from a terminal dca ligand, whereas the second biq N atom occupies the axial position. Thermal decomposition of 1 in an air atmosphere proceeds gradually, with copper(I) cyanide being the final decomposition product. Magnetic measurements revealed the formation of alternating spin chains and a relatively strong exchange interaction within the binuclear units was also confirmed by Broken Symmetry DFT (density functional theory) calculations.

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