Zobrazeno 1 - 10
of 114
pro vyhledávání: '"M. Allavena"'
Publikováno v:
The Journal of Chemical Physics. 115:6827-6833
Careful calculations are performed to obtain the radial density–density response function for the He and the Be series. This is also done along the adiabatic connection of the density functional theory (as the system evolves from the real, physical
Publikováno v:
Journal of Molecular Structure. 484:145-159
A molecular mechanics method using interaction potentials fitted on “Symmetry Adapted Perturbation Theory” calculations is applied to the determination of some structural and vibrational properties of interacting CO and CO 2 species, either in ga
Publikováno v:
The Journal of Physical Chemistry A. 103:2766-2774
Three different model clusters simulating the acid site in zeolites are employed to explore the stability of the hydrogen bonded adsorption complex and silyl−ether addition compounds on adsorption of the carbonyls formaldehyde, acetaldehyde, and ac
Publikováno v:
Journal of Molecular Structure. 450:69-78
The structure of the CO:H 2 O complex and its isomers have been determined by using the molecular mechanics procedure. The parameters used in atomic pair potentials construction are derived by fitting on ab initio perturbation calculations of atomic
Publikováno v:
Chemical Physics Letters. 288:538-544
Catalytic activity changes resulting from Si>Al substitution modelled by corresponding ab initio cluster calculations have been compared with analogous perturbational values obtained from an atomic multipole expansion. Preliminary results indicate th
Publikováno v:
The Journal of Chemical Physics. 105:10092-10098
In a previous work, experimental evidence for different conformations of the weakly bonded CO:CO2 complex has been given in argon matrices, from the analysis of FTIR absorption spectra. A spontaneous interconversion occurs between a high frequency fo
Publikováno v:
Chemical Physics Letters. 262:321-328
The principal components and orientation of the principal axes of the 13C chemical shielding. 14N electric field gradient and CN dipolar tensors of the nitrile group of the 1 : 1 stoichiometric acetonitrile-H-ZSM-5 adsorption complex have been determ
Autor:
M. Allavena, David White, J. Sepa, and R. J. Gorte, E. M. Evleth, E. Kassab, Chi-Wan Lee, and H. Jessri
Publikováno v:
The Journal of Physical Chemistry. 100:18515-18523
The principal components of the carbonyl carbon chemical shift tensor of the hydrogen-bonded 1:1 stoichiometric acetone−H−ZSM-5 adsorption complex have been determined from an analysis of 13C NMR spectra of static and magic angle sample spinning
Publikováno v:
The Journal of Physical Chemistry. 98:13189-13194
Publikováno v:
Journal of Molecular Structure. 325:85-93
A survey of recent results on proton transfer in zeolites obtained by ab initio calculations is given. The dependence of the results on the methodological procedures used are discussed, in particular the role of the cluster model which mimics the zeo