Pedro A Enriquez

Pedro A Enriquez
University of La Rioja | UNIRIOJA · Chemistry

BsC , MSc, PhD Chemistry

About

25
Publications
2,186
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782
Citations
Additional affiliations
January 1993 - present
University of La Rioja
Position
  • Lecturer of Physical Chemistry

Publications

Publications (25)
Conference Paper
Full-text available
La cinética química es una rama esencial de la Química Física que analiza a qué velocidad ocurren las reacciones químicas, qué factores influyen en dicha velocidad y cuáles son los posibles mecanismos que explican cuánto tardan en suceder dichas transformaciones. No es hasta 2º de Bachillerato cuando el alumnado se sumerge en el estudio de la cinét...
Poster
Full-text available
Obtaining an atomic or molecular spectrum in the laboratory is a very interesting activity for chemistry and physics students at secondary and tertiary level. In this way, students: - Gain experience in the use of spectroscopic techniques in chemistry, physics and related sciences. - Through experience it helps them to integrate some fundamental bu...
Article
Full-text available
A new set of six accurate ab initio potential energy surfaces (PESs) is presented for the first three singlet and triplet states of LiH2+ (1,21A', 11A'', 1,23A', and 13A'' states, where four of them are investigated for the first time), which have allowed new detailed studies gaining a global view on this interesting system. These states are releva...
Poster
Full-text available
La obtención de un espectro atómico o molecular en el laboratorio de prácticas es una actividad muy interesante para los alumnos de Química y Física. Por una parte, se muestra un ejemplo de cómo se utilizan las técnicas de espectroscopia aplicada en disciplinas de la Química y la Física. Por otra parte, es una experiencia didáctica ideal para intro...
Chapter
Full-text available
En los proyectos PID-13 2017/2018 y PID-41 2018/19, nuestro equipo desarrolló e implementó materiales para la formación de los estudiantes del Máster de Profesorado en el uso de los teléfonos inteligentes como una herramienta didáctica para el desarrollo de prácticas de laboratorio. La pandemia provocada por el nuevo virus SARS-CoV-2 nos hizo plant...
Conference Paper
Full-text available
El proyecto eNCLaUsTrA2 que presentamos en esta comunicación surge de la reflexiones que realizamos durante la preparación y desarrollo de las prácticas de laboratorio de la asignatura Complementos de Formación Disciplinar (esp. Física y Química) del Máster en Profesorado. En el curso 2020-21, consecuencia de las medidas sanitarias adoptadas debido...
Article
The dynamics of the O(3P) + CH4(X1A1) →OH(X2∏) + CH3(X2A”1) reaction and its isotopic variant with CD4 was studied at several collision energies (Ecol) of experimental interest, using the quasiclassical trajectory (QCT) method on the ground potential energy surface (GHMS PES). This ab initio analytical PES, previously developed using the O-X-(CX3)...
Article
The O((3)P) + CH(4) reaction has been investigated using the quasi-classical trajectory (QCT) method and an ab initio pseudotriatomic potential energy surface (PES). This has been mainly motivated by very recent experiments which support the reliability of the triatomic modeling even at high collision energy (<E(col)> = 64 kcal mol(-1)). The QCT re...
Book
Full-text available
Curso de introducción a la programación en Fortran 90.
Article
Reaction cross-section, product energy and angular distributions for the OH+D2→HOD+D reaction have been calculated using the quasiclassical trajectory method with the recently developed YZCL2 potential energy surface at 0.28 eV collision energy. Although the calculated cross-section, σr=0.077±0.002 Å2, underestimates the experimental value, σr=0.22...
Article
We studied the effects of collision energy (ET) on the dynamics of the title reaction using the quasiclassical trajectory method on an analytical triatomic potential energy surface that we had derived for this system. We compared the dependence of the scalar and two-vector properties of the reaction on ET with experimental data and obtained a quite...
Article
The full characterization of the nascent OH(X(2)Pi, nu'', N'', J', Lambda") state distributions for the O(D-1) + C2H6 --> OH + C2H5 reaction has been experimentally performed using the laser-induced fluorescence technique to probe the nu" = 0-4 levels of the OH molecules. This thorough study has been carried out for the first time using the N2O pho...
Article
The full characterization of the OH(, v″=0–3, N″, J″, Λ″) product state distributions for the reaction was experimentally performed using the laser-induced fluorescence (LIF) technique. Statistical spin–orbit distributions were obtained, while some preference for the formation of the Π(A′) Λ-doublet level was observed. The rovibrational populations...
Article
A study of the collision energy effects on the dynamics of the title reaction was performed using the quasi-classical trajectories (QCT) method and an analytical triatomic potential energy surface recently derived by our group. Scalar and two-vector properties of the reaction were analysed in terms of the collision energy. The results obtained can...
Article
Full-text available
The influence of the collision energy (E T) on the O( 1D) + RH → OH(X 2H) + R (RH = CH 4, C 2H 6, and C 3H 8) reaction dynamics has been studied, using the N 2O photodissociation at 193 nm as O( 1D) precursor (〈E T〉 = 0.403 eV) and probing the OH v″ = 0 and 1 levels by LIF. A triatomic QCT study of the reaction with CH 4 on a fully ab initio based...
Article
The influence of the collision energy (E-T) on the O(D-1) + RH --> OH(X(2)Pi) + R (RH = CH4, C2H6, and C3H8) reaction dynamics has been studied, using the N2O photodissociation at 193 nm as O(D-1) precursor ([E-T] = 0.403 eV) and probing the OH v " = 0 and 1 levels by LIF. A triatomic QCT study of the reaction with CH4 on a fully ab initio based an...
Article
The dynamics of the O(1D)+N2O→NO+NO reaction has been studied using the quasiclassical trajectory (QCT) method on three different triatomic LEPS (London–Eyring–Polanyi–Sato) potential energy surfaces (PES) model. The NO present in the target N2O molecule has been treated as an atom of 30.0 a.m.u. On the basis of the experimental vibrational distrib...
Article
This paper concerns the semiclassical description, calculation and measurement of angular momentum polarization in the products of elementary gas‐phase bimolecular reactions. A unified, semiclassical treatment of the centre‐of‐mass correlated (k,k′,j′) angular distribution involving the reagent and product relative velocity and the product angular...
Article
The application of polarised, Doppler-resolved laser-induced fluorescence (LIF) probing of the products scattered from photon-induced ‘half-collision’(photodissociation) and ‘full-collision’(bimolecular reaction) processes is developed to include the velocity dependence of their stereodynamics. Fourier-transform inversion procedures are used to der...
Article
This paper, which is the companion to the experimental paper (M. Brouard, S. P. Duxon, P. A. Enriquez and J. P. Simons, J. Chem. Soc., Faraday Trans., 1993, 89, 1435) in this issue, is divided into two parts. In the first, equations for the laboratory (LAB) velocity distribution of products generated via photoionitiated bimolecular reaction are pre...
Article
Velocity‐aligned, superthermal O(1D) atoms generated via the photodissociation of N2O have been employed to investigate the stereodynamics of the title reaction. The power of this experimental technique, when coupled with Doppler‐resolved, polarized laser‐induced fluorescence probing of the reaction products, is demonstrated by reference to the spe...
Article
The secondary reaction of velocity aligned, superthermal atoms generated via molecular photodissociation can lead to aligned secondary reaction products. Their vector properties and their quantum state distributions can be measured by using Doppler resolved, polarized laser probe techniques. A simple LAB → CM transformation can thus be used to dete...
Article
Velocity-aligned, superthermal atoms generated via polarised molecular photodissociation have been used to investigate vector correlations of bimolecular reactions. Doppler-resolved, polarised laser-probe techniques can measure correlations between k (the reagents' relative-velocity vectors), k′ (the reaction products' velocity vectors) and J′ (the...
Article
The secondary reaction of velocity aligned, superthermal atoms generated via molecular photodissociation can lead to aligned secondary reaction products. Their vector properties and their quantum safe distributions can be measured by using Doppler resolved, polarized laser probe techniques. A simple LAB â CM transformation can thus be used to deter...
Article
Full-text available
The state resolved stereodynamics of bimolecular reactions can be probed using velocity aligned photofragments as reagents, and polarised, Doppler resolved laser detection techniques for the products. The new strategy and its application to the reaction O(1D) + N2O→ NO + NO are outlined.

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