Coupling of ethanolamine ammonia-lyase protein and solvent dynamics characterized by the temperature-dependence of EPR spin probe mobility and dielectric permittivity

2021 ◽  
Vol 154 (17) ◽  
pp. 175101
Author(s):  
Alina Ionescu ◽  
Wei Li ◽  
Benjamen Nforneh ◽  
Kurt Warncke
Keyword(s):  
Dielectric Permittivity ◽  
Temperature Dependence ◽  
Spin Probe ◽  
Solvent Dynamics

Temperature dependence of molecular motions in the polyurethane-based membranes studied with paramagnetic spin probe

Polymer ◽  
2005 ◽  
Vol 46 (8) ◽  
pp. 2461-2471 ◽  
Author(s):  
A. Wolińska-Grabczyk ◽  
W. Bednarski ◽  
A. Jankowski ◽  
S. Waplak
Keyword(s):  
Temperature Dependence ◽  
Spin Probe ◽  
Molecular Motions

scholarly journals Crystal Structure and Dielectric Property of Endohedral Lithium Fullerene

2014 ◽  
Vol 70 (a1) ◽  
pp. C195-C195
Author(s):  
Shinobu Aoyagi ◽  
Kunihisa Sugimoto ◽  
Hiroshi Okada ◽  
Norihisa Hoshino ◽  
Tomoyuki Akutagawa
Keyword(s):  
Crystal Structure ◽  
Phase Transition ◽  
Dielectric Property ◽  
Low Temperature ◽  
Dielectric Permittivity ◽  
Single Crystal ◽  
Temperature Dependence ◽  
Structure Analysis ◽  
X Ray ◽  
Dielectric Phase

Endohedral lithium fullerene Li+@C60 can have a dielectric polarization by the off-centered location of the Li+ cation inside the C60 cage. The x-ray structure analysis of the PF6– salt [Li@C60](PF6) revealed that the Li+ cation occupies two off-centered equivalent positions at 20 K and hence the crystal is non-polar [1]. The disordered structure at low temperature is explained by a static orientation disorder of polar Li+@C60 cations and/or a dynamic tunneling of the Li+ cation inside the C60 cage. The Li+ tunneling would be suppressed by an intermolecular interaction at lower temperature and a dielectric phase transition might be induced. We reveal the dielectric property and crystal structure of [Li@C60](PF6) below 20 K in this study. The temperature dependence of the dielectric permittivity was measured for the single crystal down to 9 K. The dielectric permittivity increases with decreasing temperature according to the Curie-Weiss law. Such a behavior was also observed in H2O@C60 crystal but not in empty C60 crystal [2]. No dielectric phase transition was observed in H2O@C60 down to 8 K. In contrast, a dielectric anomaly suggesting a phase transition was observed in [Li@C60](PF6) around 18 K. The single-crystal x-ray diffraction experiment below 20 K was also performed at SPring-8 BL02B1. The crystal has a cubic structure at 20 K [1]. The temperature dependence of the cubic lattice constant shows no anomaly around 18 K. However, diffraction peaks that are forbidden for the given structure appear below 18 K. Thus the crystal symmetry is lowered by the dielectric phase transition. We present the result of the crystal structure analysis of the newly discovered low-temperature phase.

scholarly journals Correlation between Electron Mobility and Static Dielectric Permittivity of n-InSb

Open Physics ◽  
2015 ◽  
Vol 13 (1) ◽  
Author(s):  
K. Alfaramawi
Keyword(s):  
Elastic Scattering ◽  
Dielectric Permittivity ◽  
Temperature Dependence ◽  
Electron Mobility ◽  
Donor Concentration ◽  
Scattering Mechanisms ◽  
Static Dielectric Permittivity ◽  
The Difference ◽  
High Donor

AbstractDirect analytical calculations of the static dielectric permittivity-dependent electron mobility due to different elastic scattering mechanisms for n-type InSb were carried out. The calculated static dielectric permittivity increases by increasing of donor concentration. The temperature dependence of the electron mobility from 10 K up to 300 K has been demonstrated. Generally, the electron mobility shows peak behavior in this range of temperatures. The direct correlation between the electron mobility and the static dielectric permittivity at 300 K was investigated. The dependence of the electron mobility on donor concentration was discussed both when the static dielectric permittivity is assumed to be varying and when it is assumed to be a constant. The difference in behavior was noticed particularly at high donor concentrations.

Temperature dependence of amplitudes of libration motion of guest spin-probe molecules in organic glasses

1999 ◽  
Vol 110 (16) ◽  
pp. 8150-8154 ◽  
Author(s):  
S. V. Paschenko ◽  
Yu. V. Toropov ◽  
S. A. Dzuba ◽  
Yu. D. Tsvetkov ◽  
A. Kh. Vorobiev
Keyword(s):  
Temperature Dependence ◽  
Spin Probe ◽  
Probe Molecules ◽  
Organic Glasses ◽  
Libration Motion
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