Decacyclene Radical Anions Showing Strong Low‐energy Intramolecular Absorption and Magnetic Coupling of Spins in a Hexagonal Network

2020 ◽  
Vol 15 (17) ◽  
pp. 2689-2695
Author(s):  
Dmitri V. Konarev ◽  
Aleksey V. Kuzmin ◽  
Salavat S. Khasanov ◽  
Alexander F. Shestakov ◽  
Akihiro Otsuka ◽  
...  
Keyword(s):  
Magnetic Coupling ◽  
Low Energy ◽  
Radical Anions ◽  
Hexagonal Network

Magnetic Coupling and Optical Properties of theS6-Dodecakis(trifluoromethyl)fullerene Radical Anions in the Layered Salt (PPN+)[C60(CF3)12.−]

2014 ◽  
Vol 20 (18) ◽  
pp. 5380-5387 ◽  
Author(s):  
Dmitri V. Konarev ◽  
Natalia A. Romanova ◽  
Roman A. Panin ◽  
Alexey A. Goryunkov ◽  
Sergey I. Troyanov ◽  
...  
Keyword(s):  
Optical Properties ◽  
Magnetic Coupling ◽  
Radical Anions

scholarly journals cis-Thioindigo (TI) – a new ligand with accessible radical anion and dianion states. Strong magnetic coupling in the {[TI-(μ2-O),(μ-O)]Cp*Cr}2dimers

2017 ◽  
Vol 46 (41) ◽  
pp. 14365-14372 ◽  
Author(s):  
Dmitri V. Konarev ◽  
Salavat S. Khasanov ◽  
Alexander F. Shestakov ◽  
Alexey M. Fatalov ◽  
Mikhail S. Batov ◽  
...  
Keyword(s):  
Spin State ◽  
Radical Anion ◽  
Magnetic Coupling ◽  
Coordination Complex ◽  
Radical Anions ◽  
First Time

A coordination complex containing thioindigo (TI2−) dianions and Cr3+with a highS= 3/2 spin state and salt {cryptand[2,2,2](Na+)}(TI˙−) (2) with paramagnetic TI˙−radical anions have been studied for the first time.

Strong magnetic coupling of spins in Fe(ii) dimers with differently charged thioindigo ligands

2020 ◽  
Vol 49 (23) ◽  
pp. 7692-7696 ◽  
Author(s):  
Dmitri V. Konarev ◽  
Alexey V. Kuzmin ◽  
Mikhail S. Batov ◽  
Salavat S. Khasanov ◽  
Akihiro Otsuka ◽  
...  
Keyword(s):  
High Spin ◽  
Radical Anion ◽  
Magnetic Coupling ◽  
Coordination Complex ◽  
Radical Anions ◽  
Oxygen Atoms

Coordination complex of iron(ii) with radical anion and dianion of thioindigo {[2.2.2]cryptand(K+)}2{FeII(TI˙−)(TI2−)}2·2C6H4Cl2 (1) is obtained. Complex has two high-spin FeII centers separated by oxygen atoms, and two TI˙− radical anions coordinated to FeII.

Optical and magnetic properties of trans-indigo˙− radical anions. Magnetic coupling between trans-indigo˙− (S = 1/2) mediated by intermolecular hydrogen N–H⋯OC bonds

2019 ◽  
Vol 43 (19) ◽  
pp. 7350-7354 ◽  
Author(s):  
Dmitri V. Konarev ◽  
Leokadiya V. Zorina ◽  
Mikhail S. Batov ◽  
Salavat S. Khasanov ◽  
Akihiro Otsuka ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Coupling ◽  
Radical Anions ◽  
Optical And Magnetic Properties

Reduction of trans-indigo yields salt {cryptand[2.2.2](K+)}6{trans-indigo}7·5.5C6H4Cl2 (1). The trans-indigo˙− radical anions are bonded by intermolecular hydrogen N–H⋯OC bonds of 2.11–2.17 Å.

Conformational Studies of the Benzophenone and Thiobenzophenone Radical Anions

1972 ◽  
Vol 50 (9) ◽  
pp. 1427-1429 ◽  
Author(s):  
F. C. Adam ◽  
Leon J. Aarons
Keyword(s):  
Spin Density ◽  
Energy Barrier ◽  
Reasonable Agreement ◽  
Low Energy ◽  
Radical Anions ◽  
Conformational Studies ◽  
Density Distributions ◽  
Planar Form ◽  
Repulsion Potential ◽  
Phenyl Rings

A conformational energy map is calculated for the anions of benzophenone and thiobenzophenone, using a Bartell repulsion potential. A low energy configuration is obtained in which the phenyl rings are counterrotated by 30° from the planar form. The energy barrier to concerted rotation is also calculated and found to be in reasonable agreement with the findings of Takeshita and Hirota for the oxyketyl. Spin density distributions are also given.

Magnetic coupling and low-energy excitations inNdGa2studied by ESR

1999 ◽  
Vol 60 (10) ◽  
pp. 7346-7351 ◽  
Author(s):  
J. Dolinšek ◽  
D. Arčon ◽  
P. Cevc ◽  
Z. Jagličić ◽  
Z. Trontelj ◽  
...  
Keyword(s):  
Magnetic Coupling ◽  
Low Energy

Perpendicular Magnetic Coupling in Fe/NiO/Fe(001) Trilayers Studied by Spin Polarized Low Energy Electron Microscopy

2004 ◽  
Vol 10 (S02) ◽  
pp. 508-509
Author(s):  
Marco Portalupi ◽  
Gey-Hong Gweon ◽  
Chris Jozwiak ◽  
Jeff Graf ◽  
A K Schmid ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Magnetic Coupling ◽  
Low Energy ◽  
Energy Electron ◽  
Spin Polarized ◽  
Low Energy Electron

Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia, USA, August 1–5, 2004.

Dissociated Σ=27 boundaries in silicon

1988 ◽  
Vol 46 ◽  
pp. 624-625
Author(s):  
A. Garg ◽  
W.A.T. Clark ◽  
J.P. Hirth
Keyword(s):  
Electron Diffraction ◽  
Local Minimum ◽  
Boundary Energy ◽  
Coincidence Site Lattice ◽  
Boundary Plane ◽  
Low Energy ◽  
Theoretical Understanding ◽  
Site Lattice ◽  
Kikuchi Pattern ◽  
Analysis Techniques

In the last twenty years, a significant amount of work has been done in the theoretical understanding of grain boundaries. The various proposed grain boundary models suggest the existence of coincidence site lattice (CSL) boundaries at specific misorientations where a periodic structure representing a local minimum of energy exists between the two crystals. In general, the boundary energy depends not only upon the density of CSL sites but also upon the boundary plane, so that different facets of the same boundary have different energy. Here we describe TEM observations of the dissociation of a Σ=27 boundary in silicon in order to reduce its surface energy and attain a low energy configuration.The boundary was identified as near CSL Σ=27 {255} having a misorientation of (38.7±0.2)°/[011] by standard Kikuchi pattern, electron diffraction and trace analysis techniques. Although the boundary appeared planar, in the TEM it was found to be dissociated in some regions into a Σ=3 {111} and a Σ=9 {122} boundary, as shown in Fig. 1.

Transfer optics for high spatial resolution electron spectroscopy

1988 ◽  
Vol 46 ◽  
pp. 666-667
Author(s):  
G. G. Hembree ◽  
Luo Chuan Hong ◽  
P.A. Bennett ◽  
J.A. Venables
Keyword(s):  
Magnetic Field ◽  
Scanning Transmission Electron Microscope ◽  
Low Energy ◽  
Objective Lens ◽  
State University ◽  
Arizona State University ◽  
Initial Field ◽  
Resolution Electron ◽  
Scanning Transmission ◽  
Low Energy Electrons

A new field emission scanning transmission electron microscope has been constructed for the NSF HREM facility at Arizona State University. The microscope is to be used for studies of surfaces, and incorporates several surface-related features, including provision for analysis of secondary and Auger electrons; these electrons are collected through the objective lens from either side of the sample, using the parallelizing action of the magnetic field. This collimates all the low energy electrons, which spiral in the high magnetic field. Given an initial field Bi∼1T, and a final (parallelizing) field Bf∼0.01T, all electrons emerge into a cone of semi-angle θf≤6°. The main practical problem in the way of using this well collimated beam of low energy (0-2keV) electrons is that it is travelling along the path of the (100keV) probing electron beam. To collect and analyze them, they must be deflected off the beam path with minimal effect on the probe position.

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