Browsing Chemistry & Biochemistry by Title
Now showing items 12-31 of 41
Delocalized water and fluoride contributions to Dyson orbitals for electron detachment from the hydrated fluoride anion
(2021-01-26)
The experimental vertical electron detachment energy VEDE of aqueous fluoride, F− H2O , is
approximately 9.8 eV, but spectral assignment is complicated by interference between F− 2p and
H2O 1b1 orbitals. The electronic ...
Dependence of the multipole moments, static polarizabilities, and static hyperpolarizabilities of the hydrogen molecule on the H-H separation in the ground singlet state
(2020-06-25)
In this work, we provide values for the quadrupole moment Theta, the hexadecapole moment Phi, the dipole polarizability alpha, the quadrupole polarizability C, the dipole-octopole polarizability E, the second dipole ...
Direct ΔMBPT(2) method for ionization potentials, electron affinities, and excitation energies using fractional occupation numbers
(2020-01-16)
A direct method (D-ΔMBPT(2)) to calculate second-order ionization potentials (IPs), electron affinities (EAs), and excitation energies is developed. The ΔMBPT(2) method is defined as the correlated extension of the ΔHF ...
Double Rydberg anions with solvated ammonium kernels: Electron binding energies and Dyson orbitals
(2020-03-10)
Ab initio electron-propagator calculations on the electron detachment energies and associated Dyson orbitals of NnH3n+1- for n = 1-5 confirm the assignment of low-energy peaks in anion photoelectron spectra to double Rydberg ...
Efficient evaluation of analytic Fukui functions
(2021-01-26)
An efficient method for the analytic evaluation of Fukui functions is proposed. Working equations
are derived and numerical results are used to validate the method on medium size set of molecules.
In addition to the ...
Electron binding energies and Dyson orbitals of Al(5)O(m)(-) (m=3,4,5) and Al(5)O(5)H(2)(-)
(2021-01-26)
Photoelectron spectra of Al5Om
− m=3–5 and of the anion produced by the dissociative adsorption
of a water molecule by Al5O4
− are interpreted with density-functional geometry optimizations and
electron-propagator ...
Electron propagator and coupled-cluster calculations on the photoelectron spectra of thiouracil and dithiouracil anions
(2021-01-26)
Electron affinities, vertical electron detachment energies, and isomerization energies of 4-thiouracil, 2-thiouracil, and 2,4-dithiouracil and their valence anions have been calculated with ab initio electron propagator ...
Electron propagator calculations on C-60 and C-70 photoelectron spectra
(2021-01-26)
Vertical ionization energies of C60 and C70 fullerenes are calculated with semidirect implementations
of electron propagator methods and a triple- plus polarization basis set. These predictions are in
close agreement ...
Eukaryotic N-Glycosylation Occurs via the Membrane-anchored C-terminal Domain of the Stt3p Subunit of Oligosaccharyltransferase
(2020-07-24)
N-Glycosylation is an essential and highly conserved protein
modification. In eukaryotes, it is catalyzed by a multisubunit
membrane-associated enzyme, oligosaccharyltransferase (OT).
We report the high resolution ...
Excitation energies, photoionization cross sections, and asymmetry parameters of the methyl and silyl radicals
(2020-01-16)
Vertical excitation energies of the methyl and silyl radicals were inferred from ab initio electron
propagator calculations on the electron affinities of CH3
+ and SiH3
+. Photoionization cross sections
and angular ...
First-order symmetry-adapted perturbation theory for multiplet splittings
(2020-06-25)
We present a symmetry-adapted perturbation theory (SAPT) for the interaction of two high-spin open-shell molecules (described by their restricted open-shell Hartree-Fock determinants) resulting in low-spin states of the ...
A generalized any-particle propagator theory: Prediction of proton affinities and acidity properties with the proton propagator
(2020-01-16)
We have recently extended the electron propagator theory to the treatment of any type of particle
using an Any-Particle Molecular Orbital (APMO) wavefunction as reference state. This approach,
called APMO/PT, has been ...
Highly accurate potential energy surface for the He-H-2 dimer
(2020-01-16)
A new highly accurate interaction potential is constructed for the He–H2 van der Waals complex. This
potential is fitted to 1900 ab initio energies computed at the very large-basis coupled-cluster level
and augmented by ...
Integral approximations in ab initio, electron propagator calculations
(2021-01-26)
Treatments of interelectronic repulsion that avoid four-center integrals have been incorporated in ab
initio, electron-propagator calculations with diagonal self-energy matrices. Whereas the formal
scaling of arithmetic ...
The interaction-induced dipole of H-2-H: New ab initio results and spherical tensor analysis
(2020-04-08)
We present numerical results for the dipole induced by interactions between a hydrogen molecule and a hydrogen atom, obtained from finite-field calculations in an aug-cc-pV5Z basis at the unrestricted coupled-cluster level ...
Interpretation of the photoelectron spectra of superalkali species: Li3O and Li3O-
(2020-10-02)
The present paper deals with the interpretation of the photoelectron spectrum of the Li3O-. After several failed attempts to attribute all of the observed peaks in the experimental spectrum to anionic species, neutral ...
Interpretation of the photoelectron spectra of superalkali species: Na3O and Na3O-
(2020-08-20)
Recently measured photoelectron spectra of the Na3O- anion have been interpreted with the aid of ab initio electron propagator calculations. As in the case of the Li3O-, we propose that the photoionization of ground and ...
OH3- and O2H5- double Rydberg anions: Predictions and comparisons with NH4- and N2H7-
(2021-01-26)
A low barrier in the reaction pathway between the double Rydberg isomer of OH3
− and a
hydride-water complex indicates that the former species is more difficult to isolate and characterize
through anion photoelectron ...
On the accuracy of explicitly correlated coupled-cluster interaction energies - have orbital results been beaten yet?
(2020-08-20)
The basis set convergence of weak interaction energies for dimers of noble gases helium through
krypton is studied for six variants of the explicitly correlated, frozen geminal coupled-cluster singles, doubles, and ...
Partial photoionization cross sections of and Rydberg radicals
(2021-01-26)
ammonium and oxonium Rydberg radicals from the outermost, occupied orbitals of their respective
ground states are reported. These properties are known to be relevant in photoelectron dynamics
studies. For the present ...