EFFECT OF THE ION MOTION AT LOW ELECTRON DENSITIES ON THE PROFILES OF THE LINES 4471 Å AND 4922 Å OF HeI

1979 ◽  
Vol 40 (C7) ◽  
pp. C7-81-C7-82
Author(s):  
C. Fleurier ◽  
G. Coulaud ◽  
J. Chapelle
Keyword(s):  
Electron Densities ◽  
Ion Motion

Dynamics of Ion Locking in Doubly Polymerized Ionic Liquids

2020 ◽  
Author(s):  
Swati Arora ◽  
Julisa Rozon ◽  
Jennifer Laaser
Keyword(s):  
Dielectric Constant ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Ion Pairs ◽  
Polymer Chains ◽  
Ion Motion ◽  
Charged Species ◽  
Broadband Dielectric Spectroscopy ◽  
Covalently Linked ◽  
Insight Into

<div>In this work, we investigate the dynamics of ion motion in “doubly-polymerized” ionic liquids (DPILs) in which both charged species of an ionic liquid are covalently linked to the same polymer chains. Broadband dielectric spectroscopy is used to characterize these materials over a broad frequency and temperature range, and their behavior is compared to that of conventional “singly-polymerized” ionic liquids (SPILs) in which only one of the charged species is attached to the polymer chains. Polymerization of the DPIL decreases the bulk ionic conductivity by four orders of magnitude relative to both SPILs. The timescales for local ionic rearrangement are similarly found to be approximately four orders of magnitude slower in the DPILs than in the SPILs, and the DPILs also have a lower static dielectric constant. These results suggest that copolymerization of the ionic monomers affects ion motion on both the bulk and the local scales, with ion pairs serving to form strong physical crosslinks between the polymer chains. This study provides quantitative insight into the energetics and timescales of ion motion that drive the phenomenon of “ion locking” currently under investigation for new classes of organic electronics.</div>

scholarly journals Accuracy of electron densities obtained via Koopmans-compliant hybrid functionals

2018 ◽  
Vol 2 (4) ◽  
Author(s):  
A. R. Elmaslmane ◽  
J. Wetherell ◽  
M. J. P. Hodgson ◽  
K. P. McKenna ◽  
R. W. Godby
Keyword(s):  
Electron Densities ◽  
Hybrid Functionals

Numerical analysis of trajectories in a Cassinian ion trap of second order with trap door ion inlet

2021 ◽  
Vol 27 (1) ◽  
pp. 3-12
Author(s):  
Bjoern Raupers ◽  
Hana Medhat ◽  
Juergen Grotemeyer ◽  
Frank Gunzer
Keyword(s):  
Ion Trap ◽  
Ion Traps ◽  
Second Order ◽  
Resolving Power ◽  
Periodic Pattern ◽  
Ion Motion ◽  
Trap Door ◽  
Mass Resolving Power ◽  
Long Time ◽  
The Fourier Transform

Ion traps like the Orbitrap are well known mass analyzers with very high resolving power. This resolving power is achieved with help of ions orbiting around an inner electrode for long time, in general up to a few seconds, since the mass signal is obtained by calculating the Fourier Transform of the induced signal caused by the ion motion. A similar principle is applied in the Cassinian Ion Trap of second order, where the ions move in a periodic pattern in-between two inner electrodes. The Cassinian ion trap has the potential to offer mass resolving power comparable to the Orbitrap with advantages regarding the experimental implementation. In this paper we have investigated the details of the ion motion analyzing experimental data and the results of different numerical methods, with focus on increasing the resolving power by increasing the oscillation frequency for ions in a high field ion trap. In this context the influence of the trap door, a tunnel through which the ions are injected into the trap, on the ion velocity becomes especially important.

Molecular fingerprints based on Jacobi expansions of electron densities

2021 ◽  
Vol 140 (2) ◽  
Author(s):  
Rafael López ◽  
Frank Martínez ◽  
José Manuel García de la Vega
Keyword(s):  
Electron Densities ◽  
Molecular Fingerprints ◽  
Jacobi Expansions

Visualization of two-body electron densities and wave functions of magnetic molecules

1999 ◽  
Vol 75 (4-5) ◽  
pp. 645-654 ◽  
Author(s):  
D. Yamaki ◽  
Y. Kitagawa ◽  
H. Nagao ◽  
M. Nakano ◽  
Y. Yoshioka ◽  
...  
Keyword(s):  
Wave Functions ◽  
Electron Densities ◽  
Magnetic Molecules

λ21-cm Interstellar HI Profiles, Critical Ionization Velocities, and Derived Electron Densities

2021 ◽  
pp. 1-10
Author(s):  
Gerrit L. Verschuur ◽  
Joan T. Schmelz ◽  
Mahboubeh Asgari-Targhi
Keyword(s):  
Electron Densities
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