1
|
Ramírez-Solís A, Zicovich-Wilson CM, Hernández-Lamoneda R, Ochoa-Calle AJ. Antiferromagnetic vs. non-magnetic ε phase of solid oxygen. Periodic density functional theory studies using a localized atomic basis set and the role of exact exchange. Phys Chem Chem Phys 2017; 19:2826-2833. [PMID: 28067364 DOI: 10.1039/c6cp07445f] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The question of the non-magnetic (NM) vs. antiferromagnetic (AF) nature of the ε phase of solid oxygen is a matter of great interest and continuing debate. In particular, it has been proposed that the ε phase is actually composed of two phases, a low-pressure AF ε1 phase and a higher pressure NM ε0 phase [Crespo et al., Proc. Natl. Acad. Sci. U. S. A., 2014, 111, 10427]. We address this problem through periodic spin-restricted and spin-polarized Kohn-Sham density functional theory calculations at pressures from 10 to 50 GPa using calibrated GGA and hybrid exchange-correlation functionals with Gaussian atomic basis sets. The two possible configurations for the antiferromagnetic (AF1 and AF2) coupling of the 0 ≤ S ≤ 1 O2 molecules in the (O2)4 unit cell were studied. Full enthalpy-driven geometry optimizations of the (O2)4 unit cells were done to study the pressure evolution of the enthalpy difference between the non-magnetic and both antiferromagnetic structures. We also address the evolution of structural parameters and the spin-per-molecule vs. pressure. We find that the spin-less solution becomes more stable than both AF structures above 50 GPa and, crucially, the spin-less solution yields lattice parameters in much better agreement with experimental data at all pressures than the AF structures. The optimized AF2 broken-symmetry structures lead to large errors of the a and b lattice parameters when compared with experiments. The results for the NM model are in much better agreement with the experimental data than those found for both AF models and are consistent with a completely non-magnetic (O2)4 unit cell for the low-pressure regime of the ε phase.
Collapse
Affiliation(s)
- A Ramírez-Solís
- Depto. de Física, Centro de Investigación en Ciencias, IICBA. Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca, Morelos 62209, Mexico.
| | - C M Zicovich-Wilson
- Depto. de Física, Centro de Investigación en Ciencias, IICBA. Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Cuernavaca, Morelos 62209, Mexico.
| | - R Hernández-Lamoneda
- Centro de Investigaciones Químicas, IICBA. Universidad Autónoma del Estado de Morelos, Mexico
| | - A J Ochoa-Calle
- Departamento de Ciencias Físicas, Universidad EAFIT, Carrera 49 No. 7 Sur-50, Medellín, Colombia
| |
Collapse
|
2
|
Salustro S, Nöel Y, Zicovich-Wilson CM, Olivero P, Dovesi R. The V + I defects in diamond: An ab initio investigation of the electronic structure, of the Raman and IR spectra, and of their possible recombination. J Chem Phys 2016; 145:184701. [DOI: 10.1063/1.4966635] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Affiliation(s)
- S. Salustro
- Dipartimento di Chimica, Università di Torino and NIS (Nanostructured Interfaces and Surfaces) Centre, Via P. Giuria 5, 10125 Torino, Italy
| | - Y. Nöel
- Institut des Sciences de la Terre de Paris (UMR 7193 UPMC-CNRS), UPMC, Sorbonne Université, Paris, France
| | - C. M. Zicovich-Wilson
- Centro de Investigación en Ciencias-(IICBA), Universidad Autónoma del Estado de Morelos, Av. Universidad, 1001, Col. Chamilpa, 62209 Cuernavaca (MOR), Mexico
| | - P. Olivero
- Dipartimento di Fisica and NIS (Nanostructured Interfaces and Surfaces) Centre, Università di Torino, Via P. Giuria 1, 10125 Torino, Italy
| | - R. Dovesi
- Dipartimento di Chimica, Università di Torino and NIS (Nanostructured Interfaces and Surfaces) Centre, Via P. Giuria 5, 10125 Torino, Italy
| |
Collapse
|
3
|
Ochoa-Calle AJ, Zicovich-Wilson CM, Hernández-Lamoneda R, Ramírez-Solís A. Understanding the ε and ζ High-Pressure Solid Phases of Oxygen. Systematic Periodic Density Functional Theory Studies Using Localized Atomic Basis. J Chem Theory Comput 2015; 11:1195-205. [PMID: 26579768 DOI: 10.1021/acs.jctc.5b00017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The experimentally characterized ε and ζ phases of solid oxygen are studied by periodic Hartree-Fock (HF) and Density Functional Theory calculations at pressures from 10 to 160 GPa using different types of exchange-correlation functionals with Gaussian atomic basis sets. Full geometry optimizations of the monoclinic C2/m (O2)4 unit cell were done to study the evolution of the structural and electronic properties with pressure. Vibrational calculations were performed at each pressure. While periodic HF does not predict the ε-ζ phase transition in the considered range, Local Density approximation and Generalized Gradient approximation methods predict too low transition pressures. The performance of hybrid functional methods is dependent on the amount of non-local HF exchange. PBE0, M06, B3PW91, and B3LYP approaches correctly predict the structural and electronic changes associated with the phase transition. GGA and hybrid functionals predict a pressure range where both phases coexist, but only the latter type of methods yield results in agreement with experiment. Using the optimized (O2)4 unit cell at each pressure we show, through CASSCF(8,8) calculations, that the greater accuracy of the optimized geometrical parameters with increasing pressure is due to a decreasing multireference character of the unit cell wave function. The mechanism of the transition from the non-conducting to the conducting ζ phase is explained through the Electron Pair Localization Function, which clearly reveals chemical bonding between O2 molecules in the ab crystal planes belonging to different unit cells due to much shorter intercell O2-O2 distances.
Collapse
Affiliation(s)
- A J Ochoa-Calle
- Departamento de Física, Centro de Investigación en Ciencias, Universidad Autónoma del Estado de Morelos , Av. Universidad 1001, Cuernavaca, Morelos 62209, México
| | - C M Zicovich-Wilson
- Departamento de Física, Centro de Investigación en Ciencias, Universidad Autónoma del Estado de Morelos , Av. Universidad 1001, Cuernavaca, Morelos 62209, México
| | - R Hernández-Lamoneda
- Centro de Investigaciones Quı́micas, Universidad Autónoma del Estado de Morelos , Av. Universidad 1001, Cuernavaca, Morelos 62209, México
| | - A Ramírez-Solís
- Departamento de Física, Centro de Investigación en Ciencias, Universidad Autónoma del Estado de Morelos , Av. Universidad 1001, Cuernavaca, Morelos 62209, México
| |
Collapse
|
4
|
Zicovich-Wilson CM, Kirtman B, Civalleri B, Ramírez-Solís A. Periodic density functional theory calculations for 3-dimensional polyacetylene with empirical dispersion terms. Phys Chem Chem Phys 2010; 12:3289-93. [DOI: 10.1039/b918539a] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
5
|
Ramírez-Solís A, Kirtman B, Bernal-Jáquez R, Zicovich-Wilson CM. Periodic density functional theory studies of Li-doped polythiophene: Dependence of electronic and structural properties on dopant concentration. J Chem Phys 2009; 130:164904. [DOI: 10.1063/1.3109079] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
6
|
Zicovich-Wilson CM, Torres FJ, Pascale F, Valenzano L, Orlando R, Dovesi R. Ab initiosimulation of the IR spectra of pyrope, grossular, and andradite. J Comput Chem 2008; 29:2268-78. [DOI: 10.1002/jcc.20993] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|
7
|
Demichelis R, Noel Y, Zicovich-Wilson CM, Roetti C, Valenzano L, Dovesi R. Ab-initioquantum mechanical study of akdalaite (5Al2O3· H2O): structure and vibrational spectrum. ACTA ACUST UNITED AC 2008. [DOI: 10.1088/1742-6596/117/1/012013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
8
|
Valenzano L, Noël Y, Orlando R, Zicovich-Wilson CM, Ferrero M, Dovesi R. Ab initio vibrational spectra and dielectric properties of carbonates: magnesite, calcite and dolomite. Theor Chem Acc 2007. [DOI: 10.1007/s00214-006-0213-2] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
9
|
Abstract
The structure and cohesive energy of crystalline urea have been investigated at the ab initio level of calculation. The performance of different Hamiltonians in dealing with a hydrogen-bonded molecular crystal as crystalline urea is assessed. Detailed calculations carried out by adopting both HF and some of the most popular DFT methods in solid-state chemistry are reported. Local, gradient-corrected, and hybrid functionals have been adopted: SVWN, PW91, PBE, B3LYP, and PBE0. First, a 6-31G(d,p) basis set has been adopted, and then the basis set dependence of computed results has been investigated at the B3LYP level. All calculations were carried out by using a development version of the periodic ab initio code CRYSTAL06, which allows full optimization of lattice parameters and atomic coordinates. With the 6-31G(d,p) basis set, structural features are well reproduced by hybrid methods and GGA. LDA gives lattice parameters and hydrogen-bond distances that are too small relative to experiment, while at the HF level the opposite trend is observed. Results show that hybrid methods are more accurate than HF and both LDA and GGA functionals, with a trend in the computed properties similar to that of hydrogen-bonded molecular complexes. When BSSE and ZPE are taken into account, all methods, except LDA, give computed cohesive energies that are underestimated with respect to the experimental sublimation enthalpy. Dispersion energy, not properly taken into account by DFT methods, plays a crucial role. Such a deficiency also affects dramatically the computed crystalline structure, especially when large basis sets are adopted. We show that this is an artifact due to the BSSE. Indeed, with small basis sets the BSSE gives an extra-binding that compensates for the missing dispersion forces, thus yielding structures in fortuitous agreement with experiment.
Collapse
Affiliation(s)
- B Civalleri
- Dipartimento di Chimica IFM and NIS Centre of Excellence, Università di Torino, Via P. Giuria 7, 10125 Torino, Italy.
| | | | | |
Collapse
|
10
|
Ramírez-Solís A, Zicovich-Wilson CM, Kirtman B. Periodic Hartree-Fock and density functional theory calculations for Li-doped polyacetylene chains. J Chem Phys 2006; 124:244703. [PMID: 16821992 DOI: 10.1063/1.2208363] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We have performed periodic restricted Hartree-Fock/6-31G** and B3LYP6-31G** density functional theory calculations on Li-doped trans-polyacetylene at various dopant concentrations, using C(2m)H(2m)Li2 unit cells (m = 7-14). Except for maintaining P1 rod symmetry the geometry was completely optimized for both uniform and nonuniform doping structures. In addition to geometry we obtain atomic charges, along with soliton formation and dopant binding energies, as well as band structures and densities of states. A thorough analysis of the band structure and density of states, as a function of dopant concentration, is presented. We also characterize the complex nature of the binding interaction between Li and the polyacetylene chain.
Collapse
Affiliation(s)
- A Ramírez-Solís
- Departamento de Física, Facultad de Ciencias, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos 62210, Mexico.
| | | | | |
Collapse
|
11
|
Ugliengo * P, Busco C, Civalleri B, Zicovich-Wilson CM. Carbon monoxide adsorption on alkali and proton-exchanged chabazite: anab-initioperiodic study using the CRYSTAL code. Mol Phys 2005. [DOI: 10.1080/00268970500180865] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
|
12
|
Esteves PM, Araújo CL, Horta BAC, Alvarez LJ, Zicovich-Wilson CM, Ramírez-Solís A. The Isobutylene−Isobutane Alkylation Process in Liquid HF Revisited. J Phys Chem B 2005; 109:12946-55. [PMID: 16852607 DOI: 10.1021/jp051567a] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Details on the mechanism of HF catalyzed isobutylene-isobutane alkylation were investigated. On the basis of available experimental data and high-level quantum chemical calculations, a detailed reaction mechanism is proposed taking into account solvation effects of the medium. On the basis of our computational results, we explain why the density of the liquid media and stirring rates are the most important parameters to achieve maximum yield of alkylate, in agreement with experimental findings. The ab initio Car-Parrinello molecular dynamics calculations show that isobutylene is irreversibly protonated in the liquid HF medium at higher densities, leading to the ion pair formation, which is shown to be a minimum on the potential energy surface after optimization using periodic boundary conditions. The HF medium solvates preferentially the fluoride anion, which is found as solvated [FHF](-) or solvated F(-.)(HF)(3). On the other hand, the tert-butyl cation is weakly solvated, where the closest HF molecules appear at a distance of about 2.9 Angstrom with the fluorine termination of an HF chain.
Collapse
Affiliation(s)
- P M Esteves
- Instituto de Química, Universidade Federal do Rio de Janeiro, Cidade Universitaria CT Bloco A, 21949-900, Rio de Janeiro, Brazil.
| | | | | | | | | | | |
Collapse
|
13
|
Pascale F, Zicovich-Wilson CM, López Gejo F, Civalleri B, Orlando R, Dovesi R. The calculation of the vibrational frequencies of crystalline compounds and its implementation in the CRYSTAL code. J Comput Chem 2004; 25:888-97. [PMID: 15011261 DOI: 10.1002/jcc.20019] [Citation(s) in RCA: 415] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The problem of numerical accuracy in the calculation of vibrational frequencies of crystalline compounds from the hessian matrix is discussed with reference to alpha-quartz (SiO(2)) as a case study and to the specific implementation in the CRYSTAL code. The Hessian matrix is obtained by numerical differentiation of the analytical gradient of the energy with respect to the atomic positions. The process of calculating vibrational frequencies involves two steps: the determination of the equilibrium geometry, and the calculation of the frequencies themselves. The parameters controlling the truncation of the Coulomb and exchange series in Hartree-Fock, the quality of the grid used for the numerical integration of the Exchange-correlation potential in Density Functional Theory, the SCF convergence criteria, the parameters controlling the convergence of the optimization process as well as those controlling the accuracy of the numerical calculation of the Hessian matrix can influence the obtained vibrational frequencies to some extent. The effect of all these parameters is discussed and documented. It is concluded that with relatively economical computational conditions the uncertainty related to these parameters is smaller than 2-4 cm(-1). In the case of the Local Density Approximation scheme, comparison is possible with recent calculations performed with a Density Functional Perturbation Theory method and a plane-wave basis set.
Collapse
Affiliation(s)
- F Pascale
- Laboratoire de Pétrologie, Modélisation de Matériaux et Processus, Université Pierre et Marie Curie, 4, Place Jussieu, 75232 Paris cedex 05, France
| | | | | | | | | | | |
Collapse
|
14
|
Zicovich-Wilson CM, Pascale F, Roetti C, Saunders VR, Orlando R, Dovesi R. Calculation of the vibration frequencies of ?-quartz: The effect of Hamiltonian and basis set. J Comput Chem 2004; 25:1873-81. [PMID: 15376250 DOI: 10.1002/jcc.20120] [Citation(s) in RCA: 249] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The central-zone vibrational spectrum of alpha-quartz (SiO2) is calculated by building the Hessian matrix numerically from the analytical gradients of the energy with respect to the atomic coordinates. The nonanalytical part is obtained with a finite field supercell approach for the high-frequency dielectric constant and a Wannier function scheme for the evaluation of Born charges. The results obtained with four different Hamiltonians, namely Hartree-Fock, DFT in its local (LDA) and nonlocal gradient corrected (PBE) approximation, and hybrid B3LYP, are discussed, showing that B3LYP performs far better than LDA and PBE, which in turn provide better results than HF, as the mean absolute difference from experimental frequencies is 6, 18, 21, and 44 cm(-1), respectively, when a split valence basis set containing two sets of polarization functions is used. For the LDA results, comparison is possible with previous calculations based on the Density Functional Perturbation Theory and usage of a plane-wave basis set. The effects associated with the use of basis sets of increasing size are also investigated. It turns out that a split valence plus a single set of d polarization functions provides frequencies that differ from the ones obtained with a double set of d functions and a set of f functions on all atoms by on average less than 5 cm(-1).
Collapse
Affiliation(s)
- C M Zicovich-Wilson
- Facultad de Ciencias, Universidad Autónoma del Estado de Morelos, Av. Universidad 1001, Col. Chamilpa, 62210 Cuernavaca (Morelos), Mexico
| | | | | | | | | | | |
Collapse
|
15
|
Zicovich-Wilson CM, Viruela P, Corma A. Formation of Surface Methoxy Groups on H-Zeolites from Methanol. A Quantum Chemical Study. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100035a029] [Citation(s) in RCA: 71] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
16
|
Zicovich-Wilson CM, Corma A, Viruela P. Electronic Confinement of Molecules in Microscopic Pores. A New Concept Which Contributes to the Explanation of the Catalytic Activity of Zeolites. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100093a030] [Citation(s) in RCA: 121] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
17
|
Viruela-Martin P, Zicovich-Wilson CM, Corma A. Ab initio molecular orbital calculations of the protonation of propylene and isobutene by acidic hydroxyl groups of isomorphously substituted zeolites. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100153a047] [Citation(s) in RCA: 80] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
18
|
Márquez F, Zicovich-Wilson CM, Corma A, Palomares E, García H. Naphthalene Included within All-Silica Zeolites: Influence of the Host on the Naphthalene Photophysics. J Phys Chem B 2001. [DOI: 10.1021/jp012095c] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- F. Márquez
- Instituto de Tecnología Química, Universidad Politécnica de Valencia, CSIC Av. De los Naranjos s/n, 46022, Valencia, Spain
| | - C. M. Zicovich-Wilson
- Instituto de Tecnología Química, Universidad Politécnica de Valencia, CSIC Av. De los Naranjos s/n, 46022, Valencia, Spain
| | - A. Corma
- Instituto de Tecnología Química, Universidad Politécnica de Valencia, CSIC Av. De los Naranjos s/n, 46022, Valencia, Spain
| | - E. Palomares
- Instituto de Tecnología Química, Universidad Politécnica de Valencia, CSIC Av. De los Naranjos s/n, 46022, Valencia, Spain
| | - H. García
- Instituto de Tecnología Química, Universidad Politécnica de Valencia, CSIC Av. De los Naranjos s/n, 46022, Valencia, Spain
| |
Collapse
|
19
|
Boronat M, Zicovich-Wilson CM, Viruela P, Corma A. Cluster and periodic calculations of the ethene protonation reaction catalyzed by theta-1 zeolite: influence of method, model size, and structural constraints. Chemistry 2001; 7:1295-303. [PMID: 11322557 DOI: 10.1002/1521-3765(20010316)7:6<1295::aid-chem1295>3.0.co;2-s] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The protonation of ethene by three different acid sites of theta-1 zeolite was theoretically studied to analyze the extent and relevance of the following aspects of heterogeneous catalysis: the local geometry of the Brønsted acid site in a particular zeolite, the size of the cluster used to model the catalyst, the degree of geometry relaxation around the active site, and the effects related to medium- and long-range interactions between the reaction site and its environment. It has been found that while the reaction energy is very sensitive to the local geometry of the site, the activation energy is mainly affected by the methodology used and by electrostatic effects on account of the carbocationic nature of the transition state.
Collapse
Affiliation(s)
- M Boronat
- Instituto de Tecnología Química UPV-CSIC Universidad Politécnica de Valencia, Spain.
| | | | | | | |
Collapse
|
20
|
Zicovich-Wilson CM, Corma A. Modifying the Catalytic Activity of Ti-Zeolites by Isomorphic Substitution of Si by Ge Atoms. A Periodic Quantum-Chemical Study. J Phys Chem B 2000. [DOI: 10.1021/jp993585w] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- C. M. Zicovich-Wilson
- Instituto de Tecnología Química, Universidad Poltécnica de ValenciaC. S. I. C., Avenida Naranjos s/n, 46022 Valencia, Spain
| | - A. Corma
- Instituto de Tecnología Química, Universidad Poltécnica de ValenciaC. S. I. C., Avenida Naranjos s/n, 46022 Valencia, Spain
| |
Collapse
|
21
|
Affiliation(s)
- C. M. Zicovich-Wilson
- Instituto de Tecnologia Química, U.P.V.-C.S.I.C, Av. Naranjos s/n, 46022 Valencia, Spain, and Dipartimento di Chimica IFM, Università di Torino, via P. Giuria 5, I-10125 Torino, Italy
| | - R. Dovesi
- Instituto de Tecnologia Química, U.P.V.-C.S.I.C, Av. Naranjos s/n, 46022 Valencia, Spain, and Dipartimento di Chimica IFM, Università di Torino, via P. Giuria 5, I-10125 Torino, Italy
| | - A. Corma
- Instituto de Tecnologia Química, U.P.V.-C.S.I.C, Av. Naranjos s/n, 46022 Valencia, Spain, and Dipartimento di Chimica IFM, Università di Torino, via P. Giuria 5, I-10125 Torino, Italy
| |
Collapse
|
22
|
Affiliation(s)
- C. M. Zicovich-Wilson
- Department of Inorganic, Physical and Materials Chemistry, University of Torino, via P. Giuria 5, I-10125 Torino, Italy
| | - R. Dovesi
- Department of Inorganic, Physical and Materials Chemistry, University of Torino, via P. Giuria 5, I-10125 Torino, Italy
| |
Collapse
|