Gas-Phase Valence-Electron Photoemission Spectroscopy Using Density Functional Theory

2014 ◽  
pp. 137-191 ◽  
Author(s):  
Leeor Kronik ◽  
Stephan Kümmel
Keyword(s):  
Density Functional Theory ◽  
Gas Phase ◽  
Density Functional ◽  
Valence Electron ◽  
Photoemission Spectroscopy ◽  
Functional Theory ◽  
Electron Photoemission

Exploring chemistry features of favipiravir in octanol/water solutions

2021 ◽  
pp. 1-12
Author(s):  
Halimeh Rajabzadeh ◽  
Ayla Sharafat ◽  
Maryam Abbasi ◽  
Maryam Eslami Gharaati ◽  
Iraj Alipourfard
Keyword(s):  
Density Functional Theory ◽  
Gas Phase ◽  
Partition Coefficients ◽  
Density Functional ◽  
Water Solution ◽  
Peptide Group ◽  
Functional Theory ◽  
Water Solutions ◽  
Group Rotations ◽  
Heterocyclic Structure

Favipiravir (Fav) has become a well-known drug for medication of patients by appearance of COVID-19. Heterocyclic structure and connected peptide group could make changes for Fav yielding different features from those required features. Therefore, it is indeed a challenging task to prepare a Fav compound with specific features of desired function. In this work, existence of eight Fav structures by tautomeric formations and peptide group rotations were obtained using density functional theory (DFT) optimization calculations. Gas phase, octanol solution, and water solution were employed to show impact of solution on features of Fav besides obtaining partition coefficients (LogP) for Fav compounds. Significant impacts of solutions were seen on features of Fav with the obtained LogP order: Fav-7 >  Fav-8 >  Fav-4 >  Fav-3 >  Fav-2 >  Fav-5 >  Fav-1 >  Fav-6. As a consequence, internal changes yielded significant impacts on features of Fav affirming its carful medication of COVID-19 patients.

scholarly journals Lattice Location of Deuterium in Plasma and Gas Charged Mg Doped GaN

1999 ◽  
Vol 595 ◽  
Author(s):  
W. R. Wampler ◽  
J. C. Barbour ◽  
C. H. Seager ◽  
S. M. Myers ◽  
A. F. Wright ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Gas Phase ◽  
Density Functional ◽  
Lattice Relaxation ◽  
Functional Approach ◽  
Functional Theory ◽  
Ion Channeling ◽  
Total Energies ◽  
Lattice Locations ◽  
Mg Doped

AbstractWe have used ion channeling to examine the lattice configuration of deuterium in Mg doped GaN grown by MOCVD. The deuterium is introduced by exposure to gas phase or ECR plasmas. A density functional approach including lattice relaxation, was used to calculate total energies for various locations and charge states of hydrogen in the wurtzite Mg doped GaN lattice. Results of channeling measurements are compared with channeling simulations for hydrogen at lattice locations predicted by density functional theory.

scholarly journals Ab Initio and Density Functional Theory Reinvestigation of Gas-Phase Sulfuric Acid Monohydrate and Ammonium Hydrogen Sulfate

2006 ◽  
Vol 110 (22) ◽  
pp. 7178-7188 ◽  
Author(s):  
Theo Kurtén ◽  
Markku R. Sundberg ◽  
Hanna Vehkamäki ◽  
Madis Noppel ◽  
Johanna Blomqvist ◽  
...  
Keyword(s):  
Density Functional Theory ◽  
Sulfuric Acid ◽  
Ab Initio ◽  
Gas Phase ◽  
Density Functional ◽  
Hydrogen Sulfate ◽  
Functional Theory ◽  
Ammonium Hydrogen ◽  
Ammonium Hydrogen Sulfate
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