Experimental and Theoretical Study of Dynamic Structural Transformations between Sensing Copper(II)-Uracil Antiferromagnetic and Metamagnetic Coordination Compounds

2020 ◽  
Vol 20 (8) ◽  
pp. 5097-5107
Author(s):  
Noelia Maldonado ◽  
Josefina Perles ◽  
José Ignacio Martínez ◽  
Carlos J. Gómez-García ◽  
María-Luisa Marcos ◽  
...  
Keyword(s):  
Coordination Compounds ◽  
Theoretical Study ◽  
Structural Transformations

Physical Analysis of Structural Transformation in Ge-Incorporated a-SbxSe100-x System

2011 ◽  
Vol 316-317 ◽  
pp. 45-53 ◽  
Author(s):  
Sunanda Sharda ◽  
Neha Sharma ◽  
Pankaj Sharma ◽  
Vineet Sharma
Keyword(s):  
Structural Transformation ◽  
Chalcogenide Glasses ◽  
Theoretical Study ◽  
Far Infrared ◽  
Structural Transformations ◽  
Physical Parameters ◽  
Physical Analysis ◽  
Melt Quenching ◽  
Structural Environment ◽  
Rigidity Percolation

Chalcogenide glasses are suitable for far-infrared and imaging applications. In the present study, Sb10Se90-xGex (x=0, 19, 21, 23, 25, 27) system has been chosen to study structural transformations via physical parameters. Bulk samples with x = 0, 19, 21, 23, 25 and 27 have been prepared using the melt-quenching technique. A theoretical study of the ternary glass system revealed that there was a significant change in the structural environment of the system due to rigidity percolation, which took place as Se was replaced by Ge, and hence resulted in changes in other physical parameters of the system.

Effects of the Au(I)-Au(I) closed-shell attraction on the electronic and phosphorescent properties in a series of coordination compounds: A theoretical study

2011 ◽  
Vol 111 (15) ◽  
pp. 4378-4388 ◽  
Author(s):  
Jesús Muñiz ◽  
Enrique Sansores ◽  
J. A. Reyes-nava ◽  
V.-H. Ramos-sanchez ◽  
Alfredo Olea
Keyword(s):  
Coordination Compounds ◽  
Theoretical Study ◽  
Closed Shell

scholarly journals Chelate ring stacking interactions in the supramolecular assemblies of Zn(ii)and Cd(ii) coordination compounds: a combined experimental and theoretical study

CrystEngComm ◽  
2017 ◽  
Vol 19 (10) ◽  
pp. 1389-1399 ◽  
Author(s):  
Farhad Akbari Afkhami ◽  
Ali Akbar Khandar ◽  
Ghodrat Mahmoudi ◽  
Waldemar Maniukiewicz ◽  
Atash V. Gurbanov ◽  
...  
Keyword(s):  
Coordination Compounds ◽  
Theoretical Study ◽  
Chelate Ring ◽  
Supramolecular Assemblies ◽  
Stacking Interactions ◽  
Π Interactions

We report seven Zn(ii)/Cd(ii) complexes with picolinoyl/isonicotinoyl hydrazone based ligands exhibiting relevant chelate–π interactions.

Structural Transformation of a Germanium Σ=13 (510) [001] Tilt Grain Boundary under the Electron Beam

1990 ◽  
Vol 48 (1) ◽  
pp. 52-53 ◽  
Author(s):  
Jean-Luc Rouvière ◽  
Alain Bourret
Keyword(s):  
Electron Microscopy ◽  
High Resolution ◽  
Grain Boundary ◽  
Structural Transformation ◽  
Mirror Symmetry ◽  
High Resolution Electron Microscopy ◽  
Structural Transformations ◽  
Covalent Bonds ◽  
Resolution Electron ◽  
Tilt Grain Boundary

The possible structural transformations during the sample preparations and the sample observations are important issues in electron microscopy. Several publications of High Resolution Electron Microscopy (HREM) have reported that structural transformations and evaporation of the thin parts of a specimen could happen in the microscope. Diffusion and preferential etchings could also occur during the sample preparation.Here we report a structural transformation of a germanium Σ=13 (510) [001] tilt grain boundary that occurred in a medium-voltage electron microscopy (JEOL 400KV).Among the different (001) tilt grain boundaries whose atomic structures were entirely determined by High Resolution Electron Microscopy (Σ = 5(310), Σ = 13 (320), Σ = 13 (510), Σ = 65 (1130), Σ = 25 (710) and Σ = 41 (910), the Σ = 13 (510) interface is the most interesting. It exhibits two kinds of structures. One of them, the M-structure, has tetracoordinated covalent bonds and is periodic (fig. 1). The other, the U-structure, is also tetracoordinated but is not strictly periodic (fig. 2). It is composed of a periodically repeated constant part that separates variable cores where some atoms can have several stable positions. The M-structure has a mirror glide symmetry. At Scherzer defocus, its HREM images have characteristic groups of three big white dots that are distributed on alternatively facing right and left arcs (fig. 1). The (001) projection of the U-structure has an apparent mirror symmetry, the portions of good coincidence zones (“perfect crystal structure”) regularly separate the variable cores regions (fig. 2).

Sign in / Sign up

Export Citation Format

Share Document