X-ray absorption and X-ray excited optical luminescence (XEOL) studies of KAu(CN)2 at the C, N and K K-edge and the Au L3-edge—comparison with density functional theory (DFT) calculation

2005 ◽  
Vol 144-147 ◽  
pp. 811-815 ◽  
Author(s):  
P.-S.G. Kim ◽  
Y.-F. Hu ◽  
Y.M. Yiu ◽  
T.K. Sham
Keyword(s):  
Density Functional Theory ◽  
Density Functional ◽  
Dft Calculation ◽  
Functional Theory ◽  
X Ray ◽  
Optical Luminescence ◽  
X Ray Absorption

Electronic, magnetic, vibrational, and X-ray spectroscopy of inverse full-Heusler Fe2IrSi alloy

2021 ◽  
Author(s):  
Lalrinkima ◽  
C. E. Ekuma ◽  
T. C. Chibueze ◽  
L. A. Fomin ◽  
I. V. Malikov ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Absorption Spectroscopy ◽  
Density Functional ◽  
Functional Theory ◽  
X Ray ◽  
X Ray Absorption ◽  
Full Heusler

The electronic, magnetic, structural, vibrational, and X-ray absorption spectroscopy of inverse full-Heusler Fe2IrSi alloy has been studied from density functional theory (DFT). The XA-phase with FM-configuration is the most stable one, structurally and thermodynamically.

scholarly journals Copper-catalyzed aerobic oxidative coupling: From ketone and diamine to pyrazine

2015 ◽  
Vol 1 (9) ◽  
pp. e1500656 ◽  
Author(s):  
Kun Wu ◽  
Zhiliang Huang ◽  
Xiaotian Qi ◽  
Yingzi Li ◽  
Guanghui Zhang ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Oxidative Coupling ◽  
Density Functional ◽  
Coupling Reaction ◽  
Density Functional Theory Calculations ◽  
Radical Species ◽  
Functional Theory ◽  
X Ray ◽  
Oxidative Coupling Reaction ◽  
X Ray Absorption

Copper-catalyzed aerobic oxidative C–H/N–H coupling between simple ketones and diamines was developed toward the synthesis of a variety of pyrazines. Various substituted ketones were compatible for this transformation. Preliminary mechanistic investigations indicated that radical species were involved. X-ray absorption fine structure experiments elucidated that the Cu(II) species 5 coordinated by two N atoms at a distance of 2.04 Å and two O atoms at a shorter distance of 1.98 Å was a reactive one for this aerobic oxidative coupling reaction. Density functional theory calculations suggested that the intramolecular coupling of cationic radicals was favorable in this transformation.

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