scholarly journals Reduction and Accumulation of Gold(III) byMedicago sativaAlfalfa Biomass:  X-ray Absorption Spectroscopy, pH, and Temperature Dependence

2000 ◽  
Vol 34 (20) ◽  
pp. 4392-4396 ◽  
Author(s):  
J. L. Gardea-Torresdey ◽  
K. J. Tiemann ◽  
G. Gamez ◽  
K. Dokken ◽  
Irene Cano-Aguilera ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Absorption Spectroscopy ◽  
X Ray ◽  
X Ray Absorption

scholarly journals The Electronic Structure Signature of the Spin Cross-Over Transition of [Co(dpzca)2]

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Xin Zhang ◽  
Sai Mu ◽  
Yang Liu ◽  
Jian Luo ◽  
Jian Zhang ◽  
...  
Keyword(s):  
Magnetic Susceptibility ◽  
Electronic Structure ◽  
Temperature Dependence ◽  
Absorption Spectroscopy ◽  
Spin State ◽  
Density Functional ◽  
Correlation Energy ◽  
High Spin State ◽  
X Ray ◽  
X Ray Absorption

Abstract The unoccupied electronic structure of the spin crossover molecule cobalt (II) N-(2-pyrazylcarbonyl)-2-pyrazinecarboxamide, [Co(dpzca)2] was investigated, using X-ray absorption spectroscopy (XAS) and compared with magnetometry (SQUID) measurements. The temperature dependence of the XAS and molecular magnetic susceptibility χmT are in general agreement for [Co(dpzca)2], and consistent with density functional theory (DFT). This agreement of magnetic susceptibility and X-ray absorption spectroscopy provides strong evidence that the changes in magnetic moment can be ascribed to changes in electronic structure. Calculations show the choice of Coulomb correlation energy U has a profound effect on the electronic structure of the low spin state, but has little influence on the electronic structure of the high spin state. In the temperature dependence of the XAS, there is also evidence of an X-ray induced excited state trapping for [Co(dpzca)2] at 15 K.

An X-ray absorption spectroscopy study of the pressure and temperature dependence of ZnBr2aqueous supercritical solutions

2001 ◽  
Vol 8 (2) ◽  
pp. 178-181 ◽  
Author(s):  
Y. Calzavara ◽  
V. Simonet ◽  
J. L. Hazemann ◽  
R. Argoud ◽  
O. Geaymond ◽  
...  
Keyword(s):  
Temperature Dependence ◽  
Absorption Spectroscopy ◽  
Spectroscopy Study ◽  
X Ray ◽  
Supercritical Solutions ◽  
X Ray Absorption

X-RAY ABSORPTION SPECTROSCOPY STUDY OF Cu-BASED METHANOL CATALYSTS. 2. REDUCED STATE

1986 ◽  
Vol 47 (C8) ◽  
pp. C8-237-C8-242 ◽  
Author(s):  
B. S. CLAUSEN ◽  
B. LENGELER ◽  
B. S. RASMUSSEN ◽  
W. NIEMANN ◽  
H. TOPSØE
Keyword(s):  
Absorption Spectroscopy ◽  
Spectroscopy Study ◽  
X Ray ◽  
X Ray Absorption ◽  
Reduced State
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